Search for medical conditions, diseases, and health problems in ICD-11 (International Classification of Diseases, 11th Revision).

Use this tool to:

• Find ICD-11 codes for diagnoses

• Search for diseases by name or keyword

• Look up conditions in multiple languages

Returns matching entities with codes, titles, and relevance scores.

Get detailed information about a specific ICD-11 entity by code or URI.

Use this tool to:

• Get the full definition of a disease

• Retrieve coding notes and exclusions

• Get the official title and synonyms

Provide either an ICD-11 code (e.g., "BA00") or a full foundation URI.

Navigate the ICD-11 hierarchy to find parent or child entities.

Use this tool to:

• Find broader categories (parents) of a condition

• Find specific subtypes (children) of a condition

• Understand the classification structure

Direction 'parents' returns ancestor categories, 'children' returns subcategories.

List all ICD-11 chapters (top-level categories).

Use this tool to:

• Get an overview of ICD-11 structure

• Find which chapter covers a body system or condition type

• Navigate to specific disease categories

ICD-11 has 28 chapters covering all areas of medicine.

Get postcoordination information for an ICD-11 code.

Use this tool to:

• Find available axes for building composite codes

• Check required vs optional postcoordination

• Understand code extension possibilities

Postcoordination allows adding severity, laterality, anatomy, etc.

Search for laboratory tests, clinical observations, and measurements in LOINC (Logical Observation Identifiers Names and Codes).

Use this tool to:

• Find LOINC codes for lab tests (e.g., "glucose", "hemoglobin")

• Search for clinical measurements and vital signs

• Look up diagnostic observations

Returns matching LOINC codes with names, components, and properties.

Get detailed information about a specific LOINC code.

Use this tool to:

• Get the full name and description of a LOINC code

• Find the component, property, timing, and system

• Check the scale type and method

Provide a LOINC number in format "XXXXX-X" (e.g., "2339-0" for Glucose).

Get the list of valid answers for a LOINC questionnaire item.

Use this tool to:

• Find valid response options for survey questions

• Get answer codes for data entry validation

• Look up standardized answer lists

Only applicable to LOINC codes that represent questions with defined answer sets.

Get the structure of a LOINC panel or form.

Use this tool to:

• See all tests included in a panel (e.g., CBC, metabolic panel)

• Get the structure of assessment forms

• Find related observations grouped together

Returns the list of LOINC codes that make up the panel.

Search for drugs in RxNorm (Normalized names for clinical drugs).

Use this tool to:

• Find drug concepts by brand or generic name

• Look up medications for prescribing

• Search for drug formulations

Returns matching drugs with RxCUI identifiers, names, and term types.

Get detailed information about a specific RxNorm concept by RxCUI.

Use this tool to:

• Get the full name and synonyms for a drug

• Check the concept status (active, remapped, etc.)

• View related concepts (ingredients, brands, forms)

Provide an RxCUI (RxNorm Concept Unique Identifier) like "161".

Get active ingredients for a drug by RxCUI.

Use this tool to:

• Find the active ingredients in a medication

• Check for single vs. multiple ingredient products

• Identify the generic components of brand drugs

Returns ingredient RxCUIs and names.

Get therapeutic and pharmacologic classes for a drug.

Use this tool to:

• Find the drug class (e.g., "Beta-blockers", "NSAIDs")

• Identify therapeutic categories

• Look up mechanism of action classifications

Returns class IDs, names, and classification sources.

Map between RxNorm concepts and National Drug Codes (NDC).

Use this tool to:

• Get all NDC codes for a drug (by RxCUI)

• Find the RxCUI for an NDC code

• Cross-reference between coding systems

Provide either an RxCUI to get NDCs, or an NDC to get the RxCUI.

Search for MeSH (Medical Subject Headings) descriptors.

Use this tool to:

• Find MeSH terms for indexing medical literature

• Look up subject headings for PubMed searches

• Find controlled vocabulary terms

Returns matching descriptors with MeSH IDs and labels.

Get detailed information about a MeSH descriptor by ID.

Use this tool to:

• Get the full definition (scope note) of a MeSH term

• View tree numbers showing hierarchy location

• See related concepts and synonyms

Provide a MeSH Descriptor ID like "D015242" (Ofloxacin).

Get the tree hierarchy location(s) for a MeSH descriptor.

Use this tool to:

• See where a term fits in the MeSH hierarchy

• Understand broader/narrower relationships

• Find related terms in the same branch

MeSH tree numbers show the hierarchical path (e.g., C14.280.647 for Myocardial Infarction).

Get allowed qualifiers (subheadings) for a MeSH descriptor.

Use this tool to:

• Find which qualifiers can be combined with a descriptor

• Build precise MeSH search queries

• Understand aspects that can be specified

Qualifiers refine descriptors (e.g., "Diabetes Mellitus/drug therapy").

This tool runs the ICD-10 code as a query string against the ICD-11 search index. The search matches the code against ICD-11 entity titles, definitions, and synonyms; it does not consult any curated ICD-10 → ICD-11 mapping. Results are search hits, not authoritative mappings.

For authoritative ICD-10 → ICD-11 mappings (clinical coding, billing, migration projects), consult the WHO transition tables at https://icd.who.int/browse11/Downloads/Download.

Use this tool for exploratory lookups: confirming a code exists in ICD-11 text, finding ICD-11 entities whose descriptions reference an ICD-10 code, or seeding a manual mapping review. Do not present the results as ICD-10 → ICD-11 equivalents to clinical or billing consumers.

Provide a code like "E11" (Type 2 diabetes) or "I21" (Acute MI).

This tool looks up a LOINC code in NLM Clinical Tables and returns guidance on where to obtain a LOINC → SNOMED CT mapping. It does not perform the mapping.

Direct LOINC → SNOMED CT mappings are not freely available via API. UMLS Metathesaurus contains the relationships but requires an individual UMLS Terminology Services license; the LOINC SNOMED CT Expression Association is published by Regenstrief Institute as part of the LOINC release and requires authenticated download from loinc.org under the LOINC license.

For programmatic LOINC → SNOMED mapping, use UMLS or the LOINC Expression Association files. For interactive lookup, use the SNOMED CT browser available to your organization or the Regenstrief RELMA desktop tool.

Provide a LOINC code like "2339-0" (Glucose) or "718-7" (Hemoglobin).

Search for equivalent terms across multiple medical terminologies.

Use this tool to:

• Find the same concept in different coding systems

• Compare how terminologies represent a concept

• Support terminology mapping and data integration

Searches across: ICD-11, SNOMED CT, LOINC, RxNorm, and MeSH. Set target_terminologies to limit which are searched, or set source_terminology to exclude one (e.g. when you already have a code from that terminology and want equivalents elsewhere). The two combine: source is subtracted from targets.

Look up the WHO ATC (Anatomical Therapeutic Chemical) classification(s) for a drug by name.

Use this tool to:

• Find the ATC code for a medication (e.g., "metformin" → A10BA02)

• Identify the therapeutic and pharmacological class hierarchy

• Cross-reference drugs with their international ATC codes

Returns one entry per ATC code the drug belongs to. A single-ingredient drug typically maps to one substance-level code; combination products map to multiple. ATC codes are international (WHO Collaborating Centre); this tool retrieves them via NLM RxClass.

Look up an ATC code at level 1-4 to get its name and hierarchy level.

Use this tool to:

• Resolve an ATC code (e.g., "A10BA") to its class name ("Biguanides")

• Confirm a code exists in the current ATC index

• Identify the level (anatomical / therapeutic / pharmacological / chemical)

Accepts codes 1-5 characters long: "A" (anatomical), "A10" (therapeutic), "A10B" (pharmacological), "A10BA" (chemical). Substance-level codes (7 chars, e.g., "A10BA02") are not exposed by this endpoint — use atc_classify with the drug name to retrieve the substance code.

List the drugs (substances) that belong to an ATC class.

Use this tool to:

• Enumerate all members of a therapeutic class (e.g., "A10BA" → metformin, phenformin)

• Build a list of drugs sharing a pharmacological mechanism

• Explore an ATC subtree at any level

Each member includes its substance-level (7-char) ATC code via source_atc_code, useful for disambiguation when the queried class is at level 1-4. RxNorm's catalog is US-centric; the ATC class names and codes themselves are international.

Search the Brazilian CID-10 (Classificação Estatística Internacional de Doenças, 10ª Revisão) by Portuguese text.

Use this tool to:

• Find CID-10 codes for Brazilian SUS / ANVISA contexts ("infarto", "diabetes", "tuberculose")

• Look up the official Portuguese (CBCD/USP) translation of a clinical term

• Locate codes for billing, epidemiology, and clinical documentation in Brazil

Returns matches from CID-10 categories (3-char) and/or subcategories (4-char). Search is diacritic-insensitive: typing "infeccoes" matches "infecções". This tool searches the Brazilian Portuguese CID-10 V2008 — for the international ICD-11 (current WHO revision, in English by default), use icd11_search.

Look up a specific CID-10 code and return its Portuguese name.

Use this tool to:

• Resolve a code to its Brazilian description ("I21" → "Infarto agudo do miocárdio")

• Confirm a 3-char category or 4-char subcategory exists in CID-10

• Retrieve gender / cause-of-death restriction flags when applicable

Accepts both dotted ("A00.1") and undotted ("A001") forms; returns the canonical display.

List the 22 chapters of CID-10 with their code ranges and Portuguese titles.

Use this tool to:

• See the top-level structure of CID-10 (chapters I-XXII, e.g., "I. Algumas doenças infecciosas e parasitárias", "IX. Doenças do aparelho circulatório")

• Map a code to its chapter by code range (e.g., I00-I99 → chapter IX)

• Build a navigable table of contents for downstream tooling

Returns 22 entries — CID-10 V2008 has not been updated since 2008.

Get one CID-10 chapter and its constituent groups (e.g., "Chapter IX → I00-I02 Febre reumática aguda, I05-I09 Doenças reumáticas crônicas do coração, ...").

Use this tool to:

• Drill from a chapter into its groups

• Build hierarchical browsers

• Find which group contains a code range

Provide a chapter number (1-22).