2009AA - Current UMLS Release

What's New

Metathesaurus^®

Three new English sources were added:

• ICD-10 Procedure Coding System (ICD-10-PCS)
• International Classification of Functioning, Disability and Health (ICF)
• International Classification of Functioning, Disability and Health - Children and Youth Version (ICF-CY)

Two new translations were added:

• Korean Standard Classification of Disease Version 5 (KCD-5)
• Latvian translation of the Medical Subject Headings (MSHLAV)

31 English sources and 17 translation sources were updated. These include ICNP, MeSH, MedDRA, RxNorm, and SNOMED CT (English and Spanish). For a complete list of updated sources, see http://www.nlm.nih.gov/research/umls/updated_sources.html. For more detailed information on changes in this version of the Metathesaurus, see http://www.nlm.nih.gov/research/umls/updated_sources_expanded.html.

The Current Dental Terminology (CDT) has been removed from the Metathesaurus. CDT continues to be included in the HCPCS Version of Current Dental Terminology (HCDT).

ICD9CM_2007 to ICD10PCS_2008 mappings have been added. The mappings are bi-directional.

SNOMED CT
The Source Restriction Level (SRL) value in the 2009AA UMLS Metathesaurus has been changed from "4" to "9" for the following sources:

• SNOMED CT (SNOMEDCT)
• SNOMED CT Spanish (SCTSPA)
• SNOMED-2 (SNM)
• SNOMED International (SNMI)

There are no changes to the terms of the license, but only to the encoding of the SRL in the Metathesaurus. SRL data is encoded in Metathesaurus files: MRCONSO.RRF (MRSO in original release format) and MRSAB.

SAUI and SRUI
The values of SAUI and SRUI have been replaced with AUI and RUI. The values can be found in the STYPE column of Metathesaurus files: MRSAT.RRF and MRREL.RRF.

Medical Subject Headings, Swedish Edition
Definitions were dropped from this version.

A full Metathesaurus subset now requires 17.7 GB of disk space.

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

Two new tabs have been added to the source release documentation Web pages: Semantic Type and Source Overlap. 2009AA source pages will be published following the release at http://www.nlm.nih.gov/research/umls/sourcereleasedocs/index.html.

Users who are new to the UMLS are encouraged to review the New Users' Guide to the UMLS available at: http://www.nlm.nih.gov/research/umls/new_users.html. This guide includes online demonstrations, step-by-step instructions and a link to UMLS training materials.

Title: LNC215 to CPT2005 Mappings Bug

This bug affects the following Metathesaurus files: MRCONSO.RRF, MRSAT.RRF, MRMAP.RRF, MRRANK.RRF

Problem: MRCONSO.RRF contains Mapset metadata CUIs that describe mappings in the UMLS. These CUIs are all assigned the term type (TTY) 'XM'. The CUI 'C1704201' contains the term 'LNC215 to CPT2005 Mappings' which is the only term in this CUI. In 2009AA, this term was erroneously assigned an NLM 'MTHU' code that was shared by an term with a higher ranking term type (MRRANK.RRF). Due to the error, all of the rows in MRMAP.RRF that contain the data for the 'LNC215 to CPT2005 Mappings' are attached to the wrong CUI ('C2599619' rather than 'C1704201'). All of the attributes associated with this map in MRSAT.RRF are also attached to AUI 'A16416485', which belongs to CUI 'C2599619'

Solution: If you are a user who is interested in using the LNC215 to CPT2005 mapping from MRMAP.RRF, please use the 2008AB release, because the actual content for the map does not change from release to release. NLM will correct the error for the 2009AB UMLS release.

Date posted: May 22, 2009

Please send any issues or concerns to NLM Customer Service.

UMLS Problems (Bugs) for Previous Versions

Release information for the RRF Browser