Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Unified Medical Language System® (UMLS®)

UMLS Quick Start Guide   |  FAQs   |  Customer Support

Please see https://uts.nlm.nih.gov/uts/assets/LicenseAgreement.pdf for the current license agreement.

Last Reviewed: November 17, 2016