Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

SNOMED CT United States Edition

The SNOMED CT United States (US) Edition is the official source of SNOMED CT for use in US healthcare systems. The US Edition is a standalone release that combines the content of both the US Extension and the International releases of SNOMED CT. NLM distributes the US Edition of SNOMED CT to licensed individuals via the UMLS Terminology Services. Please see the Licensing page to learn more about licensing and how to register to obtain an Affiliate License.

For additional information regarding ONC Regulations please see this ONC FAQ.

For older versions of the US Edition of SNOMED CT, please see the SNOMED CT Archives page.

Current US Edition Release

NOTE: For the latest SNOMED CT SARS-CoV-2/COVID-19 content, see:

March 2024

Version: 20240301

Release Date: March 1, 2024

The March 2024 SNOMED CT United States (US) Edition release is now available for download. This release contains 122 new active concepts specific to the US Extension. The March 2024 US Edition of SNOMED CT is based on the content published in the January 2024 SNOMED CT International Edition and includes any SNOMED CT COVID-19 Related Content published in the January 2024 SNOMED CT International Edition. This latest version of the US Edition also includes the SNOMED CT to ICD-10-CM reference set, with over 126,000 SNOMED CT source concepts mapped to ICD-10-CM targets.

Please note - While the SNOMED CT International Edition has moved to monthly releases, the US Edition of SNOMED CT will remain on the current bi-annual release schedule of March and September.

Download Now!

MD5 hash: 8cba63bbdd2523a9a331d4589113083b

Download | View Release Notes

Download Transitive Closure Resources

MD5 hash: 8fd7bd6ddc9cb167dfdfc9d4021564ee

Download SNOMED CT to ICD-10-CM Mapping Resources

MD5 hash: 3a861512bdc1a09bfde4fcfe1f705803

View Release Notes

View Technical Specifications

Announcement - Changes in the March 2024 US Edition release

  • Deprecation of the Route of administration reference set from the US Edition release package

    The Route of Administration refset is being deprecated from the US Edition release package, as of the September 2023 US Edition release onwards.

    The concept "442311000124105 |Route of administration reference set (foundation metadata concept)|" + relates components (including the refsetDescriptor record) will remain active, however all 144 records that comprise this refset will be inactivated in the SimpleRefset file: der2_Refset_SimpleSnapshot_US1000124_20230901.txt

    In order to preserve the historical audit trail within the US Edition release package, the records will be inactivated (set the "active=0") rather than being deleted from the package completely.

    The Route of Administration reference set is still accessible as an intensional value set in the Value Set Authority Center (VSAC):

Last Reviewed: April 7, 2020