UMLS 2016AA Release Available

The 2016AA release of the Unified Medical Language System (UMLS) Knowledge Sources is available for download as of May 9, 2016.

In the new UMLS Release there are:

• More than 3.25 million concepts and nearly 13 million unique concept names from over 190 source vocabularies
• 2 new sources
  • CCS (Clinical Classifications Software)
  • NANDA-I (NANDA-I Taxonomy II)
• 1 new LOINC (LNC) translation source
  • LNC-DE-AT (German, Austria)
• 1 source removed
  • NAN (NANDA nursing diagnoses: definitions and classification). Note: Use NANDA-I in its place.
• 2 new content views
  • LOINC Top 300+ Lab Orders
  • LOINC Panels and Forms
• 2 content views removed
  • UMLS enhanced VA/KP Problem List Subset of SNOMED (Level 0+SNOMED)
  • UMLS enhanced VA/KP Problem List Subset of SNOMED (Level 0+SNOMED+MDR)
• 55 updated English sources and 38 updated translation sources including MeSH®, MedDRA, RxNorm, and SNOMED CT® (English and Spanish)
• SPECIALIST Lexicon and Lexical Tools 2016 Releases

The full Metathesaurus requires 25.5 GB of disk space; the active release requires 24.8 GB of disk space.

Release Information
For more information about the release, see the What's New and Updated Sources sections of the Release Documentation.  Additional release statistics are published on the UMLS Web site.

To access the UMLS Release files, you must have an active UMLS Metathesaurus License and a valid UTS account.  You will be prompted for your UTS username and password when downloading the files. 

Additional information regarding the UMLS is available on the UMLS homepage. New users are encouraged to take the UMLS Basics Tutorial and to explore the UMLS Quick Start Guide, and other training materials.

Source Release Documentation
2016AA Source Release Documentation Web pages will be published following the release.