Skip Navigation Bar
National Library of Medicine Technical BulletinNational Library of Medicine Technical Bulletin

Table of Contents: 2016 NOVEMBER–DECEMBER No. 413

Previous Next

UMLS 2016AB Release Available

Wilder V. UMLS 2016AB Release Available. NLM Tech Bull. 2016 Nov-Dec;(413):e3.

2016 November 15 [posted]

The 2016AB release of the Unified Medical Language System (UMLS) Knowledge Sources is available for download as of November 8, 2016.


The 2016AB Metathesaurus contains approximately 3.44 million concepts and 13.7 million unique concept names from 199 source vocabularies.

Three new sources were added:

  1. DRUGBANK (Drug & Drug Target Database)
  2. DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition)
  3. NUCCPT (National Uniform Claim Committee - Health Care Provider Taxonomy)

One new NCI sub-source was added: NCI-GENC (Geopolitical Entities, Names, and Codes (GENC) Standard Edition 1)

Two sources were removed:

  1. DSM3R - Diagnostic and Statistical Manual of Mental Disorders, Third Edition revised (DSM-III-R)
  2. DSM4 - Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV)

One new content view was added: LOINC Universal Lab Orders Value Set

One content view was removed: LOINC Top 300+ Lab Orders

Fifty-five English sources and 30 translation sources were updated. These include MeSH, MedDRA, RxNorm, and SNOMED CT (English and Spanish). A complete list is available in the Updated Sources section of the Release Documentation. For more detailed information on changes in this version of the Metathesaurus, see the Updated Sources (Expanded) section. Additional release statistics may be found in the Statistics section.


  • The full release requires 26.1 GB of disk space.
  • The active release requires 25.4 GB of disk space

New for 2016AB: The full and active release files are available as one-click downloads. Users only need to download one file for each release. After the release file is downloaded, users must unzip the file and then follow the usual step of unzipping the contents to the main folder.

Reported bugs may be viewed on the Release Notes and Bugs Web page.

MetamorphoSys can generate custom load scripts for MySQL, Oracle, or Microsoft Access when creating a Metathesaurus subset or installing the Semantic Network. Instructions are available on the UMLS Load Scripts homepage.

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. 

UMLS Learning Resources

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

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.

By Victoria Wilder
MEDLARS Management Section

NLM Technical Bulletin National Library of Medicine National Institutes of Health