medical-codes-mcp-server

Added value: +{
+  "description": "Input codes not processed because the reply reached its byte budget, in request order and as sent. Re-call with these as codes and the same system and includeHierarchy, until no deferred comes back. Absent when every code was processed.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Previous value: -"Machine-readable failure mode. Declared by this tool: `no_codes_found`: None of the requested codes resolved — in any bundled system, or in the explicit `system` when one is given. The message names each code another bundled system holds and each code present in more than one system, with those systems. `ambiguous_system`: Every requested code is present in more than one bundled system and no `system` was given; `candidateSystems` lists the union of those systems. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `no_codes_found`: None of the requested codes resolved — in any bundled system, or in the explicit `system` when one is given. The message names each code another bundled system holds and each code present in more than one system, with those systems, and each ICD-10-PCS section value, bare integer, value in ICD-9-CM form, and NDC among the misses. `ambiguous_system`: Every requested code is present in more than one bundled system and no `system` was given; `candidateSystems` lists the union of those systems. Other values are possible when a failure originates below the handler."

Previous value: -"Immediate child codes (present only when includeHierarchy is true)."New value: +"Immediate child codes (present only when includeHierarchy is true). For an ICD-10-PCS table row, the complete codes that begin with it."

Previous value: -"True when the code is a non-billable category/header (ICD-10-CM) rather than a leaf code."New value: +"True when the code is a non-billable header with codes below it — an ICD-10-CM category, a HCPCS range bucket, or a three-character ICD-10-PCS table row — rather than a leaf code."

Previous value: -"True when the code has more immediate children than `children` carries — the list was capped at the server cap (present only when includeHierarchy is true). Retrieve the full child list with medcode_browse_hierarchy or medcode_map_codes (children) for this code."New value: +"True when the code has more immediate children than `children` carries — the list was capped at the server cap (present only when includeHierarchy is true). Retrieve the full child list with medcode_map_codes (children) for this code, passing its `system`, or medcode_browse_hierarchy outside ICD-10-PCS."

Previous value: -"True when the code is a non-billable category/header (ICD-10-CM) rather than a leaf code."New value: +"True when the code is a non-billable header with codes below it — an ICD-10-CM category, a HCPCS range bucket, or a three-character ICD-10-PCS table row — rather than a leaf code."

Previous value: -"Immediate parent code (present only when includeHierarchy is true). Null at a root."New value: +"Immediate parent code, always one medcode_get_code decodes (present only when includeHierarchy is true): an ICD-10-CM code padded with the placeholder X names the nearest code above the padding (`S82.66XA` → `S82.66`), and a complete ICD-10-PCS code names its three-character table row (`0DTJ4ZZ` → `0DT`). Null at a root — an ICD-10-CM category, a HCPCS range bucket, an ICD-10-PCS table row — and for RxNorm."

Previous value: -"Why it could not be resolved (absent from every bundled system — for a bare integer, with a note that CPT / HCPCS Level I codes are out of scope — absent from the explicit `system` while another bundled system holds it, which is named, a well-formed NDC nothing maps to, hyphenated or as bare 10/11 digits, an NDC looked up under an explicit `system` that skips the NDC decode, or ambiguous across systems)."New value: +"Why it could not be resolved (absent from every bundled system — for a bare integer, with a note that CPT / HCPCS Level I codes are out of scope, and for a dotted all-digit value in ICD-9-CM form such as \"250.00\", with a note that ICD-9-CM is not bundled — absent from the explicit `system` while another bundled system holds it, which is named, an ICD-10-PCS section value looked up as a code under system ICD10PCS, which is named as that section, a well-formed NDC nothing maps to, hyphenated or as bare 10/11 digits, an NDC looked up under an explicit `system` that skips the NDC decode, or ambiguous across systems)."

Previous value: -"The target concept's RxNorm type, present on `rxcui_to_ingredients`, `rxcui_to_brands`, and `class_to_rxcuis` hits only. A class member may be any drug concept: an ingredient type below, or a drug product — \"SCD\"/\"SBD\" (clinical/branded drug) or \"GPCK\"/\"BPCK\" (generic/branded pack). Otherwise \"IN\" (ingredient), \"PIN\" (precise ingredient — a specific salt, ester, or isomer of an ingredient), \"MIN\" (multiple ingredients — a concept naming a combination, never a substance within it), or \"BN\" (brand name). Ingredient hits mix the first three, so the hit count is not the substance count: a \"MIN\" hit is the grouping concept and never counts, and a \"PIN\" names a form of a substance rather than an extra one — usually alongside the \"IN\" it refines, though two \"PIN\" esters can share a single \"IN\". Counting the \"IN\" hits is the closest reading, and under-counts those shared cases."New value: +"The target concept's RxNorm type, present on `name_to_rxcui`, `ndc_to_rxcui`, `rxcui_to_ingredients`, `rxcui_to_brands`, and `class_to_rxcuis` hits only. A drug-name match or a class member may be any drug concept: an ingredient type or brand name below, or a drug product — \"SCD\"/\"SBD\" (clinical/branded drug) or \"GPCK\"/\"BPCK\" (generic/branded pack), the four an `ndc_to_rxcui` hit always takes. Otherwise \"IN\" (ingredient), \"PIN\" (precise ingredient — a specific salt, ester, or isomer of an ingredient), \"MIN\" (multiple ingredients — a concept naming a combination, never a substance within it), or \"BN\" (brand name). Ingredient hits mix the first three, so the hit count is not the substance count: a \"MIN\" hit is the grouping concept and never counts, and a \"PIN\" names a form of a substance rather than an extra one — usually alongside the \"IN\" it refines, though two \"PIN\" esters can share a single \"IN\". Counting the \"IN\" hits is the closest reading, and under-counts those shared cases."

Previous value: -"Guidance whenever a resolvable source returns no hits, naming which of the two causes applies: it has no edge in the requested direction (a top-level code has no parent; a leaf has no children; ICD-10-PCS codes have no prefix parent; RxNorm concepts have no code hierarchy; no bundled class, or none of the requested `classType`, covers the RXCUI; a class has no direct member), or the `cursor` starts past the last page of a direction that does have results."New value: +"Guidance whenever a resolvable source returns no hits, naming which of the two causes applies: it has no edge in the requested direction (a top-level code has no parent; a leaf has no children; an ICD-10-PCS table row has no parent; RxNorm concepts have no code hierarchy; no bundled class, or none of the requested `classType`, covers the RXCUI; a class has no direct member), or the `cursor` starts past the last page of a direction that does have results."

Previous value: -"True when the code is a billable leaf. Null when the system has no billing concept."New value: +"True when the code is a billable leaf. False for headers/categories, non-billable codes, and HCPCS codes whose last valid date has passed. Null when the system has no billing concept."

Previous value: -"Machine-readable failure mode. Declared by this tool: `unknown_code`: The code does not exist in the named or detected system. `ambiguous_system`: The code is present in more than one bundled system and no `system` was given. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `unknown_code`: The code does not exist in the named system, or with no `system` in any bundled system. `ambiguous_system`: The code is present in more than one bundled system and no `system` was given. Other values are possible when a failure originates below the handler."

Previous value: -"Validity status. valid_billable = submit as-is; valid_header/valid_not_billable = needs a more specific code; valid = exists and is current in a system with no billing concept (RxNorm), so there is no billing verdict; terminated = retired."New value: +"Validity status. valid_billable = submit as-is; valid_header/valid_not_billable = needs a more specific code; valid = exists and is current in a system with no billing concept (RxNorm), so there is no billing verdict; terminated = retired — its last valid date has passed."

Previous value: -"Explanation for non-billable/terminated statuses, or null when valid_billable or valid."New value: +"Explanation for non-billable/terminated statuses. On valid_billable, null unless the code is scheduled for termination, when it names the last date the code may be used. Null when valid."

Previous value: -"Machine-readable failure mode. Declared by this tool: `no_codes_found`: None of the requested codes resolved — in any bundled system, or in the explicit `system` when one is given (the message then names any other bundled system that holds a code). Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `no_codes_found`: None of the requested codes resolved — in any bundled system, or in the explicit `system` when one is given. The message names each code another bundled system holds and each code present in more than one system, with those systems. `ambiguous_system`: Every requested code is present in more than one bundled system and no `system` was given; `candidateSystems` lists the union of those systems. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "no_codes_found"
-]New value: +[
+  "no_codes_found",
+  "ambiguous_system"
+]

Previous value: -"True when the code is a billable leaf. False for headers/categories and non-billable codes. Null when the system has no billing concept (RxNorm)."New value: +"True when the code is a billable leaf. False for headers/categories, non-billable codes, and HCPCS codes whose last valid date has passed. Null when the system has no billing concept (RxNorm)."

Previous value: -"True when the code is a billable leaf. False for headers/categories and non-billable codes. Null when the system has no billing concept (RxNorm)."New value: +"True when the code is a billable leaf. False for headers/categories, non-billable codes, and HCPCS codes whose last valid date has passed. Null when the system has no billing concept (RxNorm)."

Previous value: -"Release/version identifier baked into this build, e.g. \"ICD-10-CM FY2026\"."New value: +"Release/version identifier baked into this build, e.g. \"ICD-10-CM FY2027\"."

Previous value: -"Machine-readable failure mode. Declared by this tool: `field_not_applicable`: A `system`, `classType`, `limit`, or `cursor` was sent on a direction that does not use it. `no_mapping`: The source value did not resolve to any bundled code, drug, or class. `direction_unavailable`: A drug-crosswalk direction was requested but this build carries no RxNorm tables, or a class direction was requested but it carries no RxClass class layer. `ambiguous_system`: The source code is present in more than one system and no `system` was given. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `field_not_applicable`: A `system`, `classType`, `limit`, or `cursor` was sent on a direction that does not use it. `no_mapping`: The source value did not resolve to a bundled code, drug, or class the direction reads. The rxcui_to_* directions read RxNorm concepts only, and their miss names any other bundled system that holds the value. `direction_unavailable`: A drug-crosswalk direction was requested but this build carries no RxNorm tables, or a class direction was requested but it carries no RxClass class layer. `ambiguous_system`: The source code is present in more than one system and no `system` was given. Other values are possible when a failure originates below the handler."

Previous value: -"When true, return only billable leaf codes (exclude headers/categories). RxNorm has no billing concept, so this excludes every RxNorm concept."New value: +"When true, return only billable leaf codes (exclude headers/categories and HCPCS codes whose last valid date has passed). RxNorm has no billing concept, so this excludes every RxNorm concept."

Previous value: -"True when the code is a billable leaf. Null when the system has no billing concept (RxNorm)."New value: +"True when the code is a billable leaf. False for headers/categories, non-billable codes, and HCPCS codes whose last valid date has passed. Null when the system has no billing concept (RxNorm)."

Previous value: -[
-  {
-    "not": {
-      "required": [
-        "error"
-      ]
-    },
-    "required": [
-      "systems"
-    ]
-  },
-  {
-    "required": [
-      "error"
-    ]
-  }
-]New value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "systems",
+      "classLayer"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "classCount": {
+          "description": "RxClass class nodes bundled, including hierarchy nodes with no direct member.",
+          "type": "number"
+        },
+        "edgeCount": {
+          "description": "Drug–class edges bundled, across every source.",
+          "type": "number"
+        },
+        "sourceUrl": {
+          "description": "The RxClass API the layer was fetched from.",
+          "type": "string"
+        },
+        "sources": {
+          "description": "One entry per bundled RxClass source.",
+          "items": {
+            "additionalProperties": false,
+            "description": "Provenance for one bundled RxClass source.",
+            "properties": {
+              "classCount": {
+                "description": "Classes this source asserts at least one bundled edge to.",
+                "type": "number"
+              },
+              "edgeCount": {
+                "description": "Drug–class edges this source contributes.",
+                "type": "number"
+              },
+              "fetchedAt": {
+                "description": "ISO 8601 date the RxClass snapshot was fetched — how current the class edges are.",
+                "type": "string"
+              },
+              "source": {
+                "description": "The RxClass source, as class hits carry it in `source`: MEDRT, FDASPL, FMTSME, VA, RXNORM (DEA schedules), or CDC (CVX).",
+                "type": "string"
+              },
+              "version": {
+                "description": "The release RxClass reports for this source, or null when it publishes none.",
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "source",
+              "version",
+              "classCount",
+              "edgeCount",
+              "fetchedAt"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        }
+      },
+      "required": [
+        "classCount",
+        "edgeCount",
+        "sourceUrl",
+        "sources"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "The RxClass drug-class layer the rxcui_to_classes and class_to_rxcuis directions of medcode_map_codes read — not a code system, so it has no entry in `systems`. Null when this build carries no class layer."
+}

Previous value: -"One entry per bundled code system, in canonical order."New value: +"One entry per bundled code system, in canonical order — the systems the `system` inputs of the other tools accept."

Previous value: -"ISO 8601 timestamp when this system was last baked."New value: +"ISO 8601 timestamp of this system’s data. For ICD-10-CM, ICD-10-PCS, and HCPCS, the time the index was built from the release named in `releaseId`. For RxNorm, which publishes no release label, the date the RxNav snapshot was fetched — how current its drug data is, unchanged by a rebuild from the same snapshot."

Added value: +{
+  "description": "For rxcui_to_classes and class_to_rxcuis only: keep only classes of this RxClass type — EPC (FDA established pharmacologic class), MOA (mechanism of action), PE (physiologic effect), PK (pharmacokinetics), TC (therapeutic category), CHEM (chemical structure), DISEASE (diseases the drug may treat, prevent, diagnose, or induce, or is contraindicated with), VA (VA drug class, recorded almost only on drug products), SCHEDULE (DEA controlled-substance schedule, recorded on drug products only), CVX (CDC vaccine code). Omit for every type. Rejected on every other direction.",
+  "enum": [
+    "EPC",
+    "MOA",
+    "PE",
+    "PK",
+    "TC",
+    "CHEM",
+    "DISEASE",
+    "VA",
+    "SCHEDULE",
+    "CVX"
+  ],
+  "type": "string"
+}

Previous value: -"Opaque continuation token from a previous response's `nextCursor`, for the paginated directions only (children, name_to_rxcui, rxcui_to_ndc). Omit for the first page; an empty string counts as omitted. A non-empty cursor on any other direction is rejected."New value: +"Opaque continuation token from a previous response's `nextCursor`, for the paginated directions only (children, name_to_rxcui, rxcui_to_ndc, rxcui_to_classes, class_to_rxcuis). Omit for the first page; an empty string counts as omitted. A non-empty cursor on any other direction is rejected."

Previous value: -"What to map to. parents/children return the immediate parent or children only (depth-1) — call iteratively to walk a full path; the rxcui/ndc/name directions are RxNorm drug crosswalks."New value: +"What to map to. parents/children return the immediate parent or children only (depth-1) — call iteratively to walk a full path; the rxcui/ndc/name directions are RxNorm drug crosswalks; rxcui_to_classes and class_to_rxcuis are RxClass drug-class crosswalks."

Previous value: -[
-  "parents",
-  "children",
-  "name_to_rxcui",
-  "ndc_to_rxcui",
-  "rxcui_to_ndc",
-  "rxcui_to_ingredients",
-  "rxcui_to_brands"
-]New value: +[
+  "parents",
+  "children",
+  "name_to_rxcui",
+  "ndc_to_rxcui",
+  "rxcui_to_ndc",
+  "rxcui_to_ingredients",
+  "rxcui_to_brands",
+  "rxcui_to_classes",
+  "class_to_rxcuis"
+]

Previous value: -"The source value: a code (for parents/children), a drug name, an NDC, or an RXCUI. Must not be blank or whitespace-only."New value: +"The source value: a code (for parents/children), a drug name, an NDC, an RXCUI, or an RxClass class ID (for class_to_rxcuis). Must not be blank or whitespace-only."

Previous value: -"Max results per page, for the paginated directions only (children, name_to_rxcui, rxcui_to_ndc). Defaults to MEDCODE_MAX_RESULTS (50), ceiling 200. Rejected on every other direction."New value: +"Max results per page, for the paginated directions only (children, name_to_rxcui, rxcui_to_ndc, rxcui_to_classes, class_to_rxcuis). Defaults to MEDCODE_MAX_RESULTS (50), ceiling 200. Rejected on every other direction."

Previous value: -"For parents/children, force the source code into this system. Omit to auto-detect. The drug directions resolve in RxNorm and accept only \"RXNORM\" (no effect); any other value there is rejected."New value: +"For parents/children, force the source code into this system. Omit to auto-detect. The drug and class directions resolve in RxNorm and accept only \"RXNORM\" (no effect); any other value there is rejected."

Previous value: -"Machine-readable failure mode. Declared by this tool: `field_not_applicable`: A `system`, `limit`, or `cursor` was sent on a direction that does not use it. `no_mapping`: The source value did not resolve to any bundled code. `direction_unavailable`: A drug-crosswalk direction was requested but this build carries no RxNorm tables. `ambiguous_system`: The source code is present in more than one system and no `system` was given. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `field_not_applicable`: A `system`, `classType`, `limit`, or `cursor` was sent on a direction that does not use it. `no_mapping`: The source value did not resolve to any bundled code, drug, or class. `direction_unavailable`: A drug-crosswalk direction was requested but this build carries no RxNorm tables, or a class direction was requested but it carries no RxClass class layer. `ambiguous_system`: The source code is present in more than one system and no `system` was given. Other values are possible when a failure originates below the handler."

Added value: +{
+  "description": "The RxClass class type, on `rxcui_to_classes` and `class_to_rxcuis` hits only — the values the `classType` input takes.",
+  "enum": [
+    "EPC",
+    "MOA",
+    "PE",
+    "PK",
+    "TC",
+    "CHEM",
+    "DISEASE",
+    "VA",
+    "SCHEDULE",
+    "CVX"
+  ],
+  "type": "string"
+}

Previous value: -"The target concept's RxNorm type, present on `rxcui_to_ingredients` and `rxcui_to_brands` hits only: \"IN\" (ingredient), \"PIN\" (precise ingredient — a specific salt, ester, or isomer of an ingredient), \"MIN\" (multiple ingredients — a concept naming a combination, never a substance within it), or \"BN\" (brand name). Ingredient hits mix the first three, so the hit count is not the substance count: a \"MIN\" hit is the grouping concept and never counts, and a \"PIN\" names a form of a substance rather than an extra one — usually alongside the \"IN\" it refines, though two \"PIN\" esters can share a single \"IN\". Counting the \"IN\" hits is the closest reading, and under-counts those shared cases."New value: +"The target concept's RxNorm type, present on `rxcui_to_ingredients`, `rxcui_to_brands`, and `class_to_rxcuis` hits only. A class member may be any drug concept: an ingredient type below, or a drug product — \"SCD\"/\"SBD\" (clinical/branded drug) or \"GPCK\"/\"BPCK\" (generic/branded pack). Otherwise \"IN\" (ingredient), \"PIN\" (precise ingredient — a specific salt, ester, or isomer of an ingredient), \"MIN\" (multiple ingredients — a concept naming a combination, never a substance within it), or \"BN\" (brand name). Ingredient hits mix the first three, so the hit count is not the substance count: a \"MIN\" hit is the grouping concept and never counts, and a \"PIN\" names a form of a substance rather than an extra one — usually alongside the \"IN\" it refines, though two \"PIN\" esters can share a single \"IN\". Counting the \"IN\" hits is the closest reading, and under-counts those shared cases."

Previous value: -"Description of the target when available: the code description for hierarchy hits, the official RxNorm name for the `name_to_rxcui`, `ndc_to_rxcui`, `rxcui_to_ingredients`, and `rxcui_to_brands` drug concepts. Absent for `rxcui_to_ndc`, whose targets are package identifiers with no description of their own."New value: +"Description of the target when available: the code description for hierarchy hits, the official RxNorm name for the `name_to_rxcui`, `ndc_to_rxcui`, `rxcui_to_ingredients`, `rxcui_to_brands`, and `class_to_rxcuis` drug concepts, and the class name for `rxcui_to_classes`. Absent for `rxcui_to_ndc`, whose targets are package identifiers with no description of their own."

Added value: +{
+  "description": "The RxClass relationship between the drug and the class, on `rxcui_to_classes` and `class_to_rxcuis` hits only: has_epc, has_moa, has_pe, has_pk, site_of_metabolism, has_tc, has_ingredient / has_chemical_structure / has_active_metabolites (CHEM), may_treat / may_prevent / may_diagnose / induces (DISEASE), has_vaclass / has_vaclass_extended, has_schedule, isa_cvx. A `ci_` relation (ci_with, ci_moa, ci_pe, ci_chemclass) is a contraindication: the drug is contraindicated with that disease or class — never an indication, and never class membership.",
+  "type": "string"
+}

Previous value: -"Which system or relationship edge produced this hit (e.g. \"ICD10CM\", \"has_ingredient\", \"NDC\")."New value: +"Which system or relationship edge produced this hit (e.g. \"ICD10CM\", \"has_ingredient\", \"NDC\"). On the class directions, the RxClass source asserting the drug–class edge: \"MEDRT\" (VA MED-RT), \"FDASPL\" (FDA structured product labels), \"FMTSME\" (Federal Medication Terminologies), \"VA\" (VA National Formulary classes), \"RXNORM\" (DEA schedules as RxNorm records them), or \"CDC\" (CVX vaccine codes)."

Previous value: -"The code system of the target value, or null when the target is not a system code (e.g. an NDC)."New value: +"The code system of the target value, or null when the target is not a system code (an NDC, or an RxClass class ID)."

Previous value: -"The mapped target value (a code, RXCUI, or NDC)."New value: +"The mapped target value (a code, RXCUI, NDC, or RxClass class ID)."

Added value: +{
+  "description": "On `rxcui_to_classes` hits only: the ingredient RXCUI a drug product inherits this class through — RxClass attaches most classes to ingredients. Absent when the class attaches to the source RXCUI itself. When several ingredients carry the same class, names an ingredient (\"IN\") over its precise ingredient (\"PIN\"), then the lowest RXCUI.",
+  "type": "string"
+}

Previous value: -"Guidance whenever a resolvable source returns no hits, naming which of the two causes applies: it has no edge in the requested direction (a top-level code has no parent; a leaf has no children; ICD-10-PCS codes have no prefix parent; RxNorm concepts have no code hierarchy), or the `cursor` starts past the last page of a direction that does have results."New value: +"Guidance whenever a resolvable source returns no hits, naming which of the two causes applies: it has no edge in the requested direction (a top-level code has no parent; a leaf has no children; ICD-10-PCS codes have no prefix parent; RxNorm concepts have no code hierarchy; no bundled class, or none of the requested `classType`, covers the RXCUI; a class has no direct member), or the `cursor` starts past the last page of a direction that does have results."

Previous value: -"Paginated directions (children, name_to_rxcui, rxcui_to_ndc) only: true when more results exist beyond this page."New value: +"Paginated directions (children, name_to_rxcui, rxcui_to_ndc, rxcui_to_classes, class_to_rxcuis) only: true when more results exist beyond this page."

Previous value: -"True when the code is a billable leaf."New value: +"True when the code is a billable leaf. Null when the system has no billing concept."

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

Previous value: -"True only when status is valid_billable."New value: +"True only when status is valid_billable. Null when status is valid — the system has no billing concept."

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

Previous value: -"Validity status. valid_billable = submit as-is; valid_header/valid_not_billable = needs a more specific code; terminated = retired."New value: +"Validity status. valid_billable = submit as-is; valid_header/valid_not_billable = needs a more specific code; valid = exists and is current in a system with no billing concept (RxNorm), so there is no billing verdict; terminated = retired."

Previous value: -[
-  "valid_billable",
-  "valid_not_billable",
-  "valid_header",
-  "terminated"
-]New value: +[
+  "valid_billable",
+  "valid_not_billable",
+  "valid_header",
+  "valid",
+  "terminated"
+]

Previous value: -"Explanation for non-billable/terminated statuses, or null when valid_billable."New value: +"Explanation for non-billable/terminated statuses, or null when valid_billable or valid."

Previous value: -"Force every code to be looked up in this system. Omit to auto-detect per code."New value: +"Force every code to be looked up in this system, which also skips the NDC decode. Omit to auto-detect per code."

Previous value: -"Machine-readable failure mode. Declared by this tool: `no_codes_found`: None of the requested codes exist in any bundled system. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `no_codes_found`: None of the requested codes resolved — in any bundled system, or in the explicit `system` when one is given (the message then names any other bundled system that holds a code). Other values are possible when a failure originates below the handler."

Previous value: -"True when the code is a billable leaf. False for headers/categories and non-billable codes."New value: +"True when the code is a billable leaf. False for headers/categories and non-billable codes. Null when the system has no billing concept (RxNorm)."

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

Previous value: -"Chapter/range bucket the code belongs to, or null when not applicable."New value: +"Chapter/range bucket the code belongs to, or null when not applicable. For RxNorm, the concept term type (IN, PIN, MIN, BN, SCD, SBD, GPCK, BPCK)."

Previous value: -"True when the code is a billable leaf. False for headers/categories and non-billable codes."New value: +"True when the code is a billable leaf. False for headers/categories and non-billable codes. Null when the system has no billing concept (RxNorm)."

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

Previous value: -"Chapter/range bucket the code belongs to, or null when not applicable."New value: +"Chapter/range bucket the code belongs to, or null when not applicable. For RxNorm, the concept term type (IN, PIN, MIN, BN, SCD, SBD, GPCK, BPCK)."

Previous value: -"Official short/abbreviated description, or null when none is on record."New value: +"Official short/abbreviated description, or null when none is on record. Always null for RxNorm, which publishes a single name."

Previous value: -"The system that answered, echoed for chaining: \"ICD10CM\", \"ICD10PCS\", \"HCPCS\", or \"RXNORM\"."New value: +"The system that answered: \"ICD10CM\", \"ICD10PCS\", \"HCPCS\", or \"RXNORM\". Pass it as `system` to medcode_check_code, or to medcode_map_codes on a parents/children walk; the map_codes drug directions accept only \"RXNORM\", which they need no `system` to reach."

Previous value: -"Official short/abbreviated description, or null when none is on record."New value: +"Official short/abbreviated description, or null when none is on record. Always null for RxNorm, which publishes a single name."

Previous value: -"The system that answered, echoed for chaining: \"ICD10CM\", \"ICD10PCS\", \"HCPCS\", or \"RXNORM\"."New value: +"The system that answered: \"ICD10CM\", \"ICD10PCS\", \"HCPCS\", or \"RXNORM\". Pass it as `system` to medcode_check_code, or to medcode_map_codes on a parents/children walk; the map_codes drug directions accept only \"RXNORM\", which they need no `system` to reach."

Previous value: -"Why it could not be resolved (absent from every bundled system, a well-formed NDC nothing maps to, or ambiguous across systems)."New value: +"Why it could not be resolved (absent from every bundled system — for a bare integer, with a note that CPT / HCPCS Level I codes are out of scope — absent from the explicit `system` while another bundled system holds it, which is named, a well-formed NDC nothing maps to, hyphenated or as bare 10/11 digits, an NDC looked up under an explicit `system` that skips the NDC decode, or ambiguous across systems)."

Previous value: -"Opaque continuation token from a previous response's `nextCursor`, for the paginated directions (children, name_to_rxcui, rxcui_to_ndc). Omit for the first page."New value: +"Opaque continuation token from a previous response's `nextCursor`, for the paginated directions only (children, name_to_rxcui, rxcui_to_ndc). Omit for the first page; an empty string counts as omitted. A non-empty cursor on any other direction is rejected."

Previous value: -"Max results per page for the paginated directions (children, name_to_rxcui, rxcui_to_ndc). Defaults to MEDCODE_MAX_RESULTS (50), ceiling 200. Ignored by the point directions."New value: +"Max results per page, for the paginated directions only (children, name_to_rxcui, rxcui_to_ndc). Defaults to MEDCODE_MAX_RESULTS (50), ceiling 200. Rejected on every other direction."

Previous value: -"For parents/children, force the source code into this system. Omit to auto-detect."New value: +"For parents/children, force the source code into this system. Omit to auto-detect. The drug directions resolve in RxNorm and accept only \"RXNORM\" (no effect); any other value there is rejected."

Previous value: -"Machine-readable failure mode. Declared by this tool: `no_mapping`: The source value did not resolve to any bundled code. `direction_unavailable`: A drug-crosswalk direction was requested but this build carries no RxNorm tables. `ambiguous_system`: The source code is present in more than one system and no `system` was given. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `field_not_applicable`: A `system`, `limit`, or `cursor` was sent on a direction that does not use it. `no_mapping`: The source value did not resolve to any bundled code. `direction_unavailable`: A drug-crosswalk direction was requested but this build carries no RxNorm tables. `ambiguous_system`: The source code is present in more than one system and no `system` was given. Other values are possible when a failure originates below the handler."

Previous value: -[
-  "no_mapping",
-  "direction_unavailable",
-  "ambiguous_system"
-]New value: +[
+  "field_not_applicable",
+  "no_mapping",
+  "direction_unavailable",
+  "ambiguous_system"
+]

Previous value: -"Guidance whenever a resolvable source returns no hits, naming which of the two causes applies: it has no edge in the requested direction (a top-level code has no parent; a leaf has no children; ICD-10-PCS codes have no prefix parent), or the `cursor` starts past the last page of a direction that does have results."New value: +"Guidance whenever a resolvable source returns no hits, naming which of the two causes applies: it has no edge in the requested direction (a top-level code has no parent; a leaf has no children; ICD-10-PCS codes have no prefix parent; RxNorm concepts have no code hierarchy), or the `cursor` starts past the last page of a direction that does have results."

Previous value: -"When true, return only billable leaf codes (exclude headers/categories)."New value: +"When true, return only billable leaf codes (exclude headers/categories). RxNorm has no billing concept, so this excludes every RxNorm concept."

Previous value: -"True when the code is a billable leaf."New value: +"True when the code is a billable leaf. Null when the system has no billing concept (RxNorm)."

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

Previous value: -"Chapter/range bucket, or null."New value: +"Chapter/range bucket, or null. For RxNorm, the concept term type (IN, PIN, MIN, BN, SCD, SBD, GPCK, BPCK)."

Previous value: -"Official short description, or null when none is on record."New value: +"Official short description, or null when none is on record. Always null for RxNorm, which publishes a single name."

Previous value: -"Guidance when nothing matched — echoes the query and suggests how to broaden."New value: +"Guidance when nothing matched — echoes the query and suggests how to broaden, or names `billableOnly` as the cause when the searched system has no billing concept."

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

Added value: +[
+  "string",
+  "null"
+]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "kind",
+      "codes",
+      "axes",
+      "truncated",
+      "shown",
+      "cap"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `unknown_node`: The node does not exist in the system — for ICD-10-PCS, also when it uses a character outside the axis alphabet or begins no bundled code. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "unknown_node"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "kind",
-  "codes",
-  "axes",
-  "truncated",
-  "shown",
-  "cap"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "system",
+      "code",
+      "status",
+      "billable",
+      "whyNot"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `unknown_code`: The code does not exist in the named or detected system. `ambiguous_system`: The code is present in more than one bundled system and no `system` was given. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "unknown_code",
+            "ambiguous_system"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "system",
-  "code",
-  "status",
-  "billable",
-  "whyNot"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "found",
+      "notFound"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `no_codes_found`: None of the requested codes exist in any bundled system. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "no_codes_found"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "found",
-  "notFound"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "systems"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode.",
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "systems"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "from",
+      "direction",
+      "resolvedSystem",
+      "hits"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode. Declared by this tool: `no_mapping`: The source value did not resolve to any bundled code. `direction_unavailable`: A drug-crosswalk direction was requested but this build carries no RxNorm tables. `ambiguous_system`: The source code is present in more than one system and no `system` was given. Other values are possible when a failure originates below the handler.",
+          "examples": [
+            "no_mapping",
+            "direction_unavailable",
+            "ambiguous_system"
+          ],
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "from",
-  "direction",
-  "resolvedSystem",
-  "hits"
-]

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +false

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Added value: +[
+  {
+    "not": {
+      "required": [
+        "error"
+      ]
+    },
+    "required": [
+      "codes",
+      "effectiveQuery",
+      "appliedFilters",
+      "truncated",
+      "shown",
+      "cap"
+    ]
+  },
+  {
+    "required": [
+      "error"
+    ]
+  }
+]

Added value: +{
+  "additionalProperties": {},
+  "description": "Present when the call failed. Absent on success.",
+  "properties": {
+    "code": {
+      "description": "JSON-RPC error code for this failure.",
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    },
+    "data": {
+      "additionalProperties": {},
+      "properties": {
+        "reason": {
+          "description": "Machine-readable failure mode.",
+          "type": "string"
+        },
+        "recovery": {
+          "additionalProperties": {},
+          "description": "Actionable next step for the caller.",
+          "properties": {
+            "hint": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "hint"
+          ],
+          "type": "object"
+        },
+        "retryable": {
+          "description": "Whether retrying may succeed.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "message": {
+      "description": "Human-readable description of what went wrong.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "message"
+  ],
+  "type": "object"
+}

Removed value: -[
-  "codes",
-  "effectiveQuery",
-  "appliedFilters",
-  "truncated",
-  "shown",
-  "cap"
-]

Added value: +{
+  "description": "Other bundled systems holding this same code string, present only when there is at least one. The verdict above is for the system this code resolved in; the code is a DIFFERENT code in each system listed here, with its own billability — \"B00\" is the ICD-10-CM category \"Herpesviral [herpes simplex] infections\" and also the ICD-10-PCS table row \"Imaging, Central Nervous System, Plain Radiography\". Re-call with `system` set to one of these values to validate it there.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Previous value: -"Codes to decode (1–50). Mixed systems are fine — each is detected independently. An NDC (hyphenated or 10/11-digit) decodes to its RxNorm product."New value: +"Codes to decode (1–50). Mixed systems are fine — each is detected independently. An NDC decodes to its RxNorm product: hyphenated as 4-4-2, 5-3-2, 5-4-1, or 5-4-2, or as bare 10/11 digits."

Added value: +{
+  "description": "Other bundled systems holding this same code string, present only when there is at least one. The result above is the system this code resolved in; the code is a DIFFERENT code in each system listed here — \"B00\" is the ICD-10-CM category \"Herpesviral [herpes simplex] infections\" and also the ICD-10-PCS table row \"Imaging, Central Nervous System, Plain Radiography\". Re-call with `system` set to one of these values to decode it there.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Previous value: -"Why it could not be resolved (unknown shape, not in the bundled release, or ambiguous)."New value: +"Why it could not be resolved (absent from every bundled system, a well-formed NDC nothing maps to, or ambiguous across systems)."

Previous value: -"Opaque continuation token from a previous response's `nextCursor`, for the paginated directions (children, name_to_rxcui). Omit for the first page."New value: +"Opaque continuation token from a previous response's `nextCursor`, for the paginated directions (children, name_to_rxcui, rxcui_to_ndc). Omit for the first page."

Previous value: -"Max results per page for the paginated directions (children, name_to_rxcui). Defaults to MEDCODE_MAX_RESULTS (50), ceiling 200. Ignored by the point directions."New value: +"Max results per page for the paginated directions (children, name_to_rxcui, rxcui_to_ndc). Defaults to MEDCODE_MAX_RESULTS (50), ceiling 200. Ignored by the point directions."

Added value: +{
+  "description": "Other bundled systems holding the same `from` code string, present only when there is at least one (hierarchy directions only — a drug name, NDC, or RXCUI is not system-scoped). The hits above were walked in `resolvedSystem` alone; the code is a DIFFERENT code with a different hierarchy in each system listed here — \"B00\" is the ICD-10-CM category \"Herpesviral [herpes simplex] infections\" and also the ICD-10-PCS table row \"Imaging, Central Nervous System, Plain Radiography\". Re-call with `system` set to one of these values to walk it there.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Added value: +{
+  "description": "The target concept's RxNorm type, present on `rxcui_to_ingredients` and `rxcui_to_brands` hits only: \"IN\" (ingredient), \"PIN\" (precise ingredient — a specific salt, ester, or isomer of an ingredient), \"MIN\" (multiple ingredients — a concept naming a combination, never a substance within it), or \"BN\" (brand name). Ingredient hits mix the first three, so the hit count is not the substance count: a \"MIN\" hit is the grouping concept and never counts, and a \"PIN\" names a form of a substance rather than an extra one — usually alongside the \"IN\" it refines, though two \"PIN\" esters can share a single \"IN\". Counting the \"IN\" hits is the closest reading, and under-counts those shared cases.",
+  "type": "string"
+}

Previous value: -"Description of the target when available."New value: +"Description of the target when available: the code description for hierarchy hits, the official RxNorm name for the `name_to_rxcui`, `ndc_to_rxcui`, `rxcui_to_ingredients`, and `rxcui_to_brands` drug concepts. Absent for `rxcui_to_ndc`, whose targets are package identifiers with no description of their own."

Previous value: -"Guidance when a resolvable code has no edge in the requested direction (e.g. a top-level code has no parent; a leaf has no children; ICD-10-PCS codes have no prefix parent)."New value: +"Guidance whenever a resolvable source returns no hits, naming which of the two causes applies: it has no edge in the requested direction (a top-level code has no parent; a leaf has no children; ICD-10-PCS codes have no prefix parent), or the `cursor` starts past the last page of a direction that does have results."

Previous value: -"Paginated directions (children, name_to_rxcui) only: true when more results exist beyond this page."New value: +"Paginated directions (children, name_to_rxcui, rxcui_to_ndc) only: true when more results exist beyond this page."

Previous value: -"Restrict to a chapter/range bucket (the value from a code's `chapter` field)."New value: +"Restrict to a chapter/range bucket (the value from a code's `chapter` field). Case-insensitive: surrounding whitespace is trimmed and the value is upper-cased to match how chapters are stored, and `appliedFilters.chapter` echoes the upper-cased value that actually ran. A blank or whitespace-only value carries no filtering intent and is treated as omitted, which the response discloses as `appliedFilters.chapter: null`."

Added value: +[
+  {
+    "const": "",
+    "type": "string"
+  },
+  {
+    "description": "A code whose children to list (ICD-10-CM/HCPCS). ICD-10-PCS supports only top-level Section browsing — a partial PCS code does not expand to next-position axis values.",
+    "minLength": 1,
+    "type": "string"
+  }
+]

Previous value: -"A node to expand. For ICD-10-CM/HCPCS, a code whose children to list. ICD-10-PCS supports only top-level Section browsing (omit `node`) — a partial PCS code does not expand to next-position axis values. Omit for the top level."New value: +"A node to expand — or omit / pass an empty string for the top level. For ICD-10-CM/HCPCS, a code whose children to list; ICD-10-PCS supports only top-level Section browsing. Must not be blank or whitespace-only when provided."

Removed value: -"string"

Previous value: -"The code to validate, with or without dots."New value: +"The code to validate, with or without dots. Must not be blank or whitespace-only."

Previous value: -"A single code to decode (with or without dots), an RXCUI, or an NDC."New value: +"A single code to decode (with or without dots), an RXCUI, or an NDC. Must not be blank or whitespace-only."

Previous value: -"The source value: a code (for parents/children), a drug name, an NDC, or an RXCUI."New value: +"The source value: a code (for parents/children), a drug name, an NDC, or an RXCUI. Must not be blank or whitespace-only."

Previous value: -"Clinical description to match, e.g. \"type 2 diabetes with neuropathy\"."New value: +"Clinical description to match, e.g. \"type 2 diabetes with neuropathy\". Must not be blank or whitespace-only."

Added value: +{
+  "description": "Opaque continuation token from a previous response's `nextCursor`, to fetch the next page of children/entries. Omit for the top of the list.",
+  "type": "string"
+}

Previous value: -"Max entries to return. Defaults to MEDCODE_MAX_RESULTS (50), ceiling 200."New value: +"Max entries per page. Defaults to MEDCODE_MAX_RESULTS (50), ceiling 200."

Previous value: -"The limit that was applied."New value: +"The page size that was applied."

Added value: +{
+  "description": "Opaque token to pass back as `cursor` for the next page. Present only when more entries exist beyond this page.",
+  "type": "string"
+}

Previous value: -"Number of entries returned (codes or axes)."New value: +"Number of entries returned on this page (codes or axes)."

Previous value: -"True when the returned list was capped at the limit."New value: +"True when more entries exist beyond this page."

Added value: +{
+  "description": "True when the code has more immediate children than `children` carries — the list was capped at the server cap (present only when includeHierarchy is true). Retrieve the full child list with medcode_browse_hierarchy or medcode_map_codes (children) for this code.",
+  "type": "boolean"
+}

Added value: +{
+  "description": "Opaque continuation token from a previous response's `nextCursor`, for the paginated directions (children, name_to_rxcui). Omit for the first page.",
+  "type": "string"
+}

Added value: +{
+  "description": "Max results per page for the paginated directions (children, name_to_rxcui). Defaults to MEDCODE_MAX_RESULTS (50), ceiling 200. Ignored by the point directions.",
+  "maximum": 200,
+  "minimum": 1,
+  "type": "integer"
+}

Added value: +{
+  "description": "Paginated directions only: the page size that was applied.",
+  "type": "number"
+}

Added value: +{
+  "description": "Paginated directions only: opaque token to pass back as `cursor` for the next page. Present only when more results exist beyond this page.",
+  "type": "string"
+}

Added value: +{
+  "description": "Paginated directions only: number of hits returned on this page.",
+  "type": "number"
+}

Added value: +{
+  "description": "Paginated directions (children, name_to_rxcui) only: true when more results exist beyond this page.",
+  "type": "boolean"
+}

Added value: +{
+  "description": "Opaque continuation token from a previous response's `nextCursor`, to fetch the next page of the same ranked result set. Omit for the first page.",
+  "type": "string"
+}

Previous value: -"Max codes to return. Defaults to the server's MEDCODE_MAX_RESULTS (50), ceiling 200."New value: +"Max codes per page. Defaults to the server's MEDCODE_MAX_RESULTS (50), ceiling 200."

Previous value: -"The limit that was applied."New value: +"The page size that was applied."

Added value: +{
+  "description": "Opaque token to pass back as `cursor` for the next page. Present only when more matches exist beyond this page.",
+  "type": "string"
+}

Previous value: -"Number of codes returned."New value: +"Number of codes returned on this page."

Previous value: -"True when results were capped at the limit."New value: +"True when more matches exist beyond this page."

Previous value: -"Codes to decode (1–50). Mixed systems are fine — each is detected independently."New value: +"Codes to decode (1–50). Mixed systems are fine — each is detected independently. An NDC (hyphenated or 10/11-digit) decodes to its RxNorm product."

Previous value: -"A single code to decode, with or without dots."New value: +"A single code to decode (with or without dots), an RXCUI, or an NDC."

Previous value: -"A decoded code, optionally with its parent and immediate children."New value: +"A decoded code, optionally with its parent/children and resolution source."

Added value: +{
+  "description": "Resolution provenance when the input was not a direct code: \"NDC\" when an NDC was decoded to its RxNorm product via the NDC↔RxNorm map. Omitted for direct code lookups.",
+  "type": "string"
+}

Previous value: -"What to map to. parents/children return the immediate parent or children only (depth-1) — call iteratively to walk a full path; the rxcui/ndc/name directions are RxNorm drug crosswalks (phase 2)."New value: +"What to map to. parents/children return the immediate parent or children only (depth-1) — call iteratively to walk a full path; the rxcui/ndc/name directions are RxNorm drug crosswalks."

Previous value: -"A node to expand. For ICD-10-CM/HCPCS, a code whose children to list. For ICD-10-PCS, a partial code whose next-position axis values to list. Omit for the top level."New value: +"A node to expand. For ICD-10-CM/HCPCS, a code whose children to list. ICD-10-PCS supports only top-level Section browsing (omit `node`) — a partial PCS code does not expand to next-position axis values. Omit for the top level."

Previous value: -"Valid next-position axis values for a partial PCS code. Empty when kind is \"codes\"."New value: +"The top-level ICD-10-PCS Section axis values (only the Section axis is enumerable). Empty when kind is \"codes\"."

Previous value: -"What to map to. parents/children walk the code hierarchy; the rxcui/ndc/name directions are RxNorm drug crosswalks (phase 2)."New value: +"What to map to. parents/children return the immediate parent or children only (depth-1) — call iteratively to walk a full path; the rxcui/ndc/name directions are RxNorm drug crosswalks (phase 2)."

Added value: +{
+  "description": "Guidance when a resolvable code has no edge in the requested direction (e.g. a top-level code has no parent; a leaf has no children; ICD-10-PCS codes have no prefix parent).",
+  "type": "string"
+}