Unified Medical Language System
Integrative framework unifying 200+ biomedical vocabularies. Cross-mappings via Metathesaurus with 4M+ concepts.
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Where this one tends to earn its keep.
Map between medical terminologies (ICD↔SNOMED)
Biomedical NLP and text mining
Clinical data warehouse terminology mapping
Cross-vocabulary concept normalization
UMLS-Agreement§3 prohibits distributing the Metathesaurus or subsets of it, including individual vocabulary sources. Useful to this catalog as a licence oracle (its per-source restriction appendix), never as republishable content.
Verified against the licence text on 2026-08-07.
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