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Unified Medical Language System® (UMLS®)

Unified Medical Language System (UMLS)

The UMLS integrates and distributes key terminology, classification and coding standards, and associated resources to promote creation of more effective and interoperable biomedical information systems and services, including electronic health records. More information...
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Access the UMLS

Sign up for a license, download files, and browse UMLS data.

Training and Documentation

View release information and learn how to use the UMLS.

UMLS Community

Learn about UMLS use across diverse organizations.

Related Terminology Resources

Read more about the UMLS and other NLM products.