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Who Uses Tool
CDS Developer/Steward
Eligible Hospital / Critical Access Hospital
Eligible Professional / Eligible Clinician
Health IT Developer/Vendor
Measure Developer/Steward

The Unified Medical Language System® (UMLS®) is a set of files and software that bring together health and biomedical vocabularies and standards to enable interoperability between computer systems. 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. Software developers can use UMLS® to enhance or develop applications, such as electronic health records, classification tools, dictionaries and language translators. Use of UMLS® allows end users to view codes, synonyms, and definitions used terminologies such as CPT and ICD-10-CM and relationships between concepts. Use requires a free UMLS license.

Unified Medical Language System
Unified Medical Language System®
Unified Medical Language System ®
Last Updated: Dec 06, 2021