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NLM - FHIR services on VSAC
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NLM - FHIR Terminology services with the Value Set Authority Center (VSAC)
Base URL: https://cts.nlm.nih.gov/fhir/
NLM continually updates the VSAC FHIR service to conform with the most recent FHIR specification.
The VSAC FHIR home page includes a capability statement and usage examples. You can use all the value sets in the production VSAC repository, and you can use any code system listed in the capability statement.
Users must have an active UMLS License. The APIs use Basic Authentication.