Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

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.

This is a preview of updates coming to the Technical Bulletin's website in April 2026. Return to current site.
Read more about the modernization release schedule in this announcement.
Comment via the yellow feedback button in the lower right hand corner of the page. Contact the NLM Help Desk with any questions or concerns.

This is archived content.

Links may have become inactive over time. Visit Archive-It   to find the original published layout.

US Extension to SNOMED CT Updated

US Extension to SNOMED CT Updated. NLM Tech Bull. 2012 Sep-Oct;(388):b2.

September 20, 2012 [posted]

The September 2012 update of the US Extension to SNOMED CT is available for download. The files contain only extension specific content and core content necessary to provide a bridge between the US Extension and the International Release. The download includes files in both SNOMED CT Release Format 1 (RF1) and Release Format 2 (RF2) versions. For more information about the US Extension to SNOMED CT, see UMLS News from April 2011.