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National Library of Medicine Technical BulletinNational Library of Medicine Technical Bulletin

Table of Contents: 2012 NOVEMBER–DECEMBER No. 389

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UMLS 2012AB Release Available

Wilder V. UMLS 2012AB Release Available. NLM Tech Bull. 2012 Nov-Dec;(389):e2.

2012 November 15 [posted]

The 2012AB release of the Unified Medical Language System (UMLS) Knowledge Sources is available for download as of November 15, 2012.

In the new UMLS Release there are:

Data Changes


Logical Observation Identifier Names and Codes (LOINC)

Medical Dictionary for Regulatory Activities (MedDRA)


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 UMLS Terminology Services (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 new UMLS Quick Start Guide, training materials and other information on the New Users' homepage.

As always, the production and mailing of the UMLS DVDs occur about four weeks after the release is made available for download.

To request or cancel a DVD:  Sign in to the UTS and edit your UTS profile to select or deselect the DVD option. 

Note: The 2012AB release is the last release for which a DVD is being produced, see: NLM Ceasing Production of UMLS DVD.

Source Release Documentation
2012AB Source Release Documentation Web pages will be published following the release.

By Victoria Wilder
MEDLARS Management Section

NLM Technical Bulletin National Library of Medicine National Institutes of Health