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Unified Medical Language System® (UMLS®)

Metathesaurus - Mapping Projects

How does NLM coordinate its mapping efforts? Learn about the NLM Basic Mapping Project Assumptions.

Current NLM Mappings Efforts

MapNotes
SNOMED CT to ICD-10 This map is maintained by the IHTSDO and is available through the US Edition of SNOMED CT.
SNOMED CT to ICD-10-CM
This map is maintained by NLM and is available through the US Edition of SNOMED CT.
ICD-9-CM Diagnostic Codes to SNOMED CT Map This map is maintained by NLM.
ICD-9-CM Procedure Codes to SNOMED CT Map This map is maintained by NLM.
LOINC to CPT Mapping This mapping is dated 2005 and is not currently maintained.
A newer version is not available.

 

You must have an active UMLS license account to download mapping files. Need an account? Sign up on the UMLS Terminology Services (UTS) Web site.

Last Reviewed: March 31, 2016