Terminologies & Code Systemsarticle · 2 min · updated Oct 14, 2026
The US Edition of SNOMED CT
By Rajendra Sharma, RN, CPC, CPBReviewed by Rajendra Sharma, RN, CPC, CPB · Oct 14, 2026
How the United States releases SNOMED CT: the National Library of Medicine, the March and September cycle, and the ICD-10-CM map.
SNOMED CT
The US National Release Center
- NLM: The National Library of Medicine is the United States National Release Center for SNOMED CT.
- Distribution: NLM distributes the US Edition to licensed individuals via the UMLS Terminology Services.
One release, two sources
- Standalone: The US Edition is a standalone release.
- Combined: It combines the content of the US Extension and the International releases.
Released in March and September
The International Edition is released monthly. The US Edition stays on a twice-a-year schedule.
A SNOMED CT to ICD-10-CM reference set
The US Edition includes a reference set that maps SNOMED CT concepts to ICD-10-CM. Treat it as a tool for reporting, and check how it was built before you rely on it.
Keep these in mind
- NLM is the US release center
- The US Edition is released in March and September
- It includes a map to ICD-10-CM
- Check which edition and release your systems are on
Release details checked 13 October 2026; they change with each US release (March and September).
References
Related entries
SNOMED CT®, LOINC®, ICD and other terminologies are the property of their respective owners and are shown for education under their licences. Licences & attributions