US Extension to SNOMED CT Updated. NLM Tech Bull. 2012 Mar-Apr;(385):b6.
The US Extension to SNOMED CT was updated on March 1, 2012 and is available for download from both the SNOMED CT and Downloads menus of the UTS. The files contain only extension specific content and core content necessary to provide a bridge between the US Extension and the International Release, and are distributed in SNOMED CT Release Format 1 (RF1). Files will be distributed in RF2 at a later date. For more information about the US Extension to SNOMED CT, see UMLS News from April 2011.