# RxNorm License: restricted (LicenseRef-National-Library-of-Medicine-terms); Mdexa hosting: link-only. a restricted part cannot be separated or the boundary is unstated: strictest part applies Risk flag(s): derived. - Commercial use: Conditional · Derivatives: Unclear · Redistribution: Conditional · File on Mdexa: No - License status: Restricted (LicenseRef-National-Library-of-Medicine-terms) - Mdexa hosting: Link only — License restricted, judged by public rules and checked by a second-pass model. Link only. - Source risk: Derived - Last verified: 2026-11-13 - Card: https://mdexa.com/datasets/rxnorm/ ## Key facts - Domain: Pharmacy and drugs, Standards and terminology - Content type: Terminologies and coding systems - Size: — - Language: English - Modality: Text - Publisher: National Library of Medicine - Year: — ## Commercial use of RxNorm - Commercial use: Conditional. The overall verdict takes the strictest part; the parts carry different licenses, listed below. - License status: Restricted. - Conditions: Keep current - License part: main data — Restricted (LicenseRef-PublicDomain) - License part: RxNorm terminology normalized names and codes (e.g. RXCUI) — Permissive (LicenseRef-PublicDomain) - License part: proprietary data from various terminology providers — Restricted (NOASSERTION) Verdicts record what sources state and are not legal advice. ## RxNorm license evidence a restricted part cannot be separated or the boundary is unstated: strictest part applies - **Terms of use page**: Statement found in snapshot s02 (page) — "The full RxNorm dataset includes government-created and proprietary names and codes for clinical drugs. A free UMLS license is required to download the full RxNorm monthly and weekly releases." — https://www.nlm.nih.gov/research/umls/rxnorm/docs/termsofservice.html (2026-11-12; Page opened) - **Site policy page**: Statement found in snapshot s02 (page) — "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." — https://www.nlm.nih.gov/research/umls/rxnorm/docs/termsofservice.html (2026-11-12; Page opened) - **Site policy page**: Statement found in snapshot s02 (page) — "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." — https://www.nlm.nih.gov/research/umls/rxnorm/docs/termsofservice.html (2026-11-12; Page opened) - **Terms of use page**: Statement found in snapshot s02 (page) — "The full RxNorm dataset includes proprietary data from various terminology providers , each with a specific Source Restriction Level (SRL) category." — https://www.nlm.nih.gov/research/umls/rxnorm/docs/termsofservice.html (2026-11-12; Page opened) - **Terms of use page**: Statement found in snapshot s02 (page) — "make known in a clear and conspicuous manner that the products/services/applications do not reflect the most current/accurate data available from NLM." — https://www.nlm.nih.gov/research/umls/rxnorm/docs/termsofservice.html (2026-11-12; Page opened) - **Site policy page**: Statement found in snapshot s03 (terms-page) — "Works produced by the U.S. government are not subject to copyright protection in the United States. Any such works found on National Library of Medicine (NLM) Web sites may be freely used or reproduced without permission in the U.S." — https://www.nlm.nih.gov/web_policies.html (2026-11-13; Page opened) - **Site policy page**: Statement found in snapshot s03 (terms-page) — "Transmission or reproduction of copyrighted items (beyond that allowed by fair use as defined in the U.S. copyright laws) requires the written permission of the copyright holders." — https://www.nlm.nih.gov/web_policies.html (2026-11-13; Page opened) - **Terms of use page**: Statement found in snapshot s02 (page) — "Section 12 of the Unified Medical Language System (UMLS) license agreement describes the categories and specific restrictions on how a terminology can be used." — https://www.nlm.nih.gov/research/umls/rxnorm/docs/termsofservice.html (2026-11-12; Page opened) - **Upstream terms**: Upstream UMLS Metathesaurus: terms cited from the snapshot of card umls — "LICENSEE is prohibited from distributing the UMLS Metathesaurus or subsets of it, including individual vocabulary sources within the Metathesaurus, except (a) as an integral part of computer applications developed by LICENSEE for a purpose other than redistribution of vocabulary sources contained in" — https://www.nlm.nih.gov/research/umls/knowledge_sources/metathesaurus/release/license_agreement.html (2026-11-13; Page opened) ## Source and lineage — - Derived from: UMLS Metathesaurus ## Known issues with RxNorm - Downloading the full RxNorm monthly and weekly releases requires a free UMLS license. - The full dataset mixes public-domain NLM names and codes with proprietary terminology data that carries source-specific restrictions. ## Preflight Not run (data not ingested). ## Downloading RxNorm and API access Mdexa does not serve files. Original source: - https://www.nlm.nih.gov/research/umls/rxnorm/ - https://www.nlm.nih.gov/research/umls/rxnorm/docs/termsofservice.html ## Citing RxNorm No recommended citation text. - 10.1136/amiajnl-2011-000116 ## Machine-readable - JSON: https://mdexa.com/datasets/rxnorm.json - 2026-11-13 Listed on 2026-11-13. Judged by public rules and checked a second time before listing. ## Continue in this database This record is one of 109 processed and verified records (datasets, data resources and open models). To find others, call `https://mcp.mdexa.com/v1/datasets?q=` or connect the MCP server at `https://mcp.mdexa.com/mcp`; no key is needed for 20 calls per minute. Rows are under 1 KB; an empty result means "not listed". For a list of items, one batch check (free account) returns a report. Guide: /agents.md. Similar records: ATC/DDD Index (https://mdexa.com/datasets/atc-ddd/); DrugCentral (https://mdexa.com/datasets/drugcentral/); openFDA (https://mdexa.com/datasets/openfda/).