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RxNorm (RxNav)

HealthUS

rxnav.nlm.nih.gov

US National Library of Medicine RxNorm drug terminology through the RxNav REST API: resolve drug names to RxCUIs, list concepts and strengths, map concepts to NDCs, fuzzy-match misspelled terms, check NDC status and read ATC/MeSH class memberships.

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Capabilities (9)

GET /v1/data/rxnorm/all-related1 credit

Returns every concept related to an RxCUI grouped by term type: ingredients, brand names, clinical and branded drugs, packs and dose forms.

rxcuirela?
GET /v1/data/rxnorm/approximate-term1 credit

Returns candidate RxCUIs for a misspelled or partial term, each with a match score, rank and the source that produced it.

termmaxEntries?option?accuracy?
GET /v1/data/rxnorm/drugs-by-name1 credit

Returns every RxNorm drug concept matching a name, grouped by term type (ingredient, brand name, clinical drug, pack) with each concept's RxCUI and full name.

namesrclist?
GET /v1/data/rxnorm/ndcs-for-rxcui1 credit

Returns the National Drug Codes that map to one RxCUI, as 11-digit codes without hyphens.

rxcui
GET /v1/data/rxnorm/ndc-status1 credit

Returns the status of an NDC: active or obsolete, whether it maps to RxNorm, and the RxCUI and concept name it resolves to.

ndc
GET /v1/data/rxnorm/properties1 credit

Returns the properties of one RxCUI: its name, term type, synonym, language and suppression flag.

rxcui
GET /v1/data/rxnorm/rxclass-by-drug1 credit

Returns every drug class an ingredient belongs to, with class id, class name, class type (ATC, MeSH, VA, EPC) and relationship.

drugNamerelaSource?rela?
GET /v1/data/rxnorm/rxcui-by-name1 credit

Resolves an exact drug name to its RxNorm concept identifier (RxCUI), returning an empty rxnormId list when the name is ambiguous or unknown.

namesearch?srclist?allsrc?
GET /v1/data/rxnorm/spelling-suggestions1 credit

Returns correctly spelled drug names close to a misspelled name.

name

Licence

The RxNorm Terms of Service separate NLM's own normalized content from the proprietary vocabularies folded into the full release: "The RxNorm terminology normalized names and codes (e.g. RXCUI) within the RxNorm dataset is created by the National Library of Medicine (NLM) and is in the public domain as it is created by the U.S. government. Public domain information may be freely distributed and copied within and outside the U.S., but it is requested that in any subsequent use, NLM be given appropriate acknowledgement. The full RxNorm dataset includes proprietary data from various terminology providers, each with a specific Source Restriction Level (SRL) category. Section 12 of the Unified Language System (UMLS) license agreement describes the categories and specific restrictions on how a terminology can be used." NLM asks for the acknowledgement: "This product uses publicly available data courtesy of the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product." The public-domain grant covers the RxCUIs and normalized names this API primarily returns, so commercial use and redistribution are true; a small number of brand and source-vocabulary strings carried in the response can be subject to the source's SRL, which is why the acknowledgement is passed through.

https://www.nlm.nih.gov/research/umls/rxnorm/docs/termsofservice.html

Attribution

Display this wherever you show the data. It arrives on every response as provenance.attribution_text.

This product uses publicly available data courtesy of the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product.

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