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UMLS API Technical Documentation

Welcome to the UMLS API Technical Documentation.

UMLS REST API

A set of convenient URI patterns and Json output that offer links for important UMLS entities such as CUIs, atoms, and subsets such as the SNOMED CT-> ICD-10-CM map. Code samples are available in the documentation as well as on github.

UMLS SOAP API

The UMLS SOAP API is deprecated as of the 2020AA release. The SOAP API will be discontinued on December 31, 2020. SOAP API users are encouraged to switch to the REST API.