Produced by the College of American Pathologists (CAP), SNOMED CT (Systematized Nomenclature of Medicine--Clinical Terms) is a comprehensive clinical terminology formed by the convergence of SNOMED RT® and the United Kingdom's Clinical Terms Version 3 (formerly known as the Read Codes).

SNOMED CT is one of a suite of designated standards for use in U.S. Federal Government systems for the electronic exchange of clinical health information. SNOMED CT is being implemented throughout the National Health Service in the United Kingdom.

The NLM, on behalf of the Department of Health and Human Services, entered into an agreement with CAP for a perpetual license for the core SNOMED CT (in Spanish and English) and ongoing updates. The terms of this license make SNOMED CT available to U.S. users at no cost through the UMLS Metathesaurus.

Additional information about SNOMED CT and its representation in the UMLS Metathesaurus is available: