UMLS 2014AB Release Available

The 2014AB release of the Unified Medical Language System (UMLS) Knowledge Sources is available for download as of November 10, 2014.

In the new UMLS Release there are:

• More than 3 million concepts and 11.9 million unique concept names from over 150 source vocabularies
• The full Metathesaurus requires 23.7 GB of disk space; the active release requires 22.8 GB of disk space.
• Three new sources
  • Library of Congress Subject Headings, Northwestern University Subset (LCH_NW)
  • National Drug File – FDA Structured Product Labeling (NDFRT_FDASPL)
  • National Drug File – Federal Medication Terminologies Subject Matter Experts (NDFRT_FMTSME)
• Two new mappings
  • Library of Congress Subject Headings, Northwestern University Subset, to MeSH: MAPSETCUI C3826807 in MRMAP and MRSMAP
  • SNOMED CT® to ICD10-CM Refset: MAPSETCUI C3853366 in MRMAP and MRSMAP
• One new content view
  • US Extension Content View – indicates that a specific atom belongs to the US Extension to SNOMED CT and carries the NLM Module ID of "731000124108"
• 23 updated English sources and 10 updated translation sources including MeSH, MedDRA, RxNorm, and SNOMED CT (English and Spanish)

Logical Observation Identifier Names and Codes (LOINC)

• LOINC Answer concepts ("LA"codes) now are included in the Metathesaurus. They are connected in MRREL to their LOINC Official Fully Specified Name (LN) atoms via the "has_answer" relationship label. The sequence in which the answer appears in the answer list is an attribute in MRSAT (ATN = "SEQ_NO") of the relationship (RUI) between the two concepts.

National Drug File - FDA SPL (NDFRT_FDASPL)

• NDFRT_FDASPA only asserts relationship and does not contribute any terms to the Metathesaurus.

National Drug File - FMTSME (NDFRT_FMTSME)

• NDFRT_FMTSME only asserts relationship and does not contribute any terms to the Metathesaurus.

NCI Thesaurus

• Each of the 22 NCI subsources now has its own RSAB in the Metathesaurus, with SRL=0. As a result there are 22 additional Root Source Abbreviations (RSABs) in the Metathesaurus. All NCI subsources belong to the newly created source family "NCI" and each new RSAB begins with the prefix "NCI_".
  • Users of this content are expected to abide by the terms of the UMLS Metathesaurus License agreement as outlined in Appendix 1.
  • The 22 new RSABs in the NCI source family are:
    1. NCI_BioC
    2. NCI_BRIDG
    3. NCI_CDC
    4. NCI_CDISC
    5. NCI_CRCH
    6. NCI_CTCAE
    7. NCI_CTEP-SDC
    8. NCI_DCP
    9. NCI_DICOM
    10. NCI_DTP
    11. NCI_FDA
    12. NCI_ICH
    13. NCI_JAX
    14. NCI_KEGG
    15. NCI_NCI-GLOSS
    16. NCI_NCI-HL7
    17. NCI_NCPDP
    18. NCI_NICHD
    19. NCI_PID
    20. NCI_RENI
    21. NCI_UCUM
    22. NCI_ZFin

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.

Source Release Documentation
2014AB Source Release Documentation Web pages will be published following the release.