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Unified Medical Language System® (UMLS®)

Release Documentation Archive

Current Release Documentation - 2015AB
Note: As of the 2009AA UMLS Release, general reference information is available as the UMLS Reference Manual. Information specific to a UMLS Release, such as sources included in the current version of the Metathesaurus and statistics regarding the number of concepts, remains on the UMLS Web site as part of the Release Documentation.

Current UMLS License Agreement

Previous Release Bugs

Previous UMLS Releases

Release Release Documentation Archives License Agreement Archival Copy Source Vocabulary Documentation Archival Copy*
2015AA 2015AA HTML 2015AA PDF 2015AA Source Pages
2014AB 2014AB HTML 2014AB PDF 2014AB Source Pages
2014AA 2014AA HTML 2014AA PDF 2014AA Source Pages
2013AB 2013AB HTML 2013AB PDF  
2013AA 2013AA HTML 2013AA PDF  
2012AB 2012AB HTML 2012AB PDF  
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2011AB 2011AB HTML 2011AB PDF  
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2006AD 2006AD HTML 2006AD PDF  
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2002AD 2002AD HTML 2002AD PDF  
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2002AB 2002AB HTML 2002AB PDF  
2002AA 2002AA HTML 2002AA PDF  


*Archive from 2014AA-present.