Unified Medical Language System® (UMLS®)
New Users
User Education
Knowledge Sources
Implementation Resources
Learn more about the Metathesaurus, the Semantic Network, and the SPECIALIST Lexicon.
- Metathesaurus
- Semantic Network
- SPECIALIST Lexicon and Lexical Tools
- Forthcoming Releases
- DVD
- UMLS Reference Manual
- Step-by-Step Guides for MetamorphoSys
To request a DVD: Sign in to the UTS, click ‘My Profile’. Click on ‘Edit Profile’, check the box, ‘I would like to receive a DVD containing the UMLS data’. Click ‘Save Profile’ to finish. - UMLS Terminology Services (UTS)