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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

January Release - 01/03/2011

This release of RxNorm is consistent with the 2010AB UMLS Metathesaurus release. For additional information about RxNorm releases, including scripts for loading the RxNorm data into Oracle and MySQL databases, read the RxNorm Documentation.


The following sources have been updated since the previous RxNorm release:

Source NameSABDate Updated
Gold Standard Alchemy GS 12/12/2010
Medi-Span Master Drug Data Base MDDB 12/01/2010
Multum MediSource Lexicon MMSL 12/01/2010
Micromedex RED BOOK MMX 12/06/2010
FDA National Drug Code Directory MTHFDA 12/01/2010
FDA Structured Product Labels MTHSPL 12/27/2010
First DataBank NDDF Plus Source Vocabulary NDDF 12/08/2010
Veterans Health Administration National Drug File - Reference Terminology NDFRT 01/03/2011
Veterans Health Administration National Drug File VANDF 11/30/2010

The following sources have not been updated since the previous RxNorm release:

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 08/30/2010
SNOMED Clinical Terms (drug information) SNOMEDCT 07/31/2010

Data Changes

There are no significant data changes for this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 304
Active BPCK forms 385
Active SCD forms 19,763
Active SBD forms 16,149
Active RXNORM MIN atoms 3,595
Active RXNORM IN atoms 4,940
Active RXNORM PIN atoms 1,545
Active RXNORM BN atoms 14,582
Active RXNORM DF atoms 100
Obsolete GPCK forms 43
Obsolete BPCK forms 15
Obsolete SCD forms 13,032
Obsolete SBD forms 4,086
Obsolete RXNORM MIN atoms 0
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 0
Obsolete RXNORM DF atoms 55
OCD atoms 272,200
Source-asserted NDC codes 606,100
Distinct Source-asserted NDC codes 356,258
SAB=RXNORM NDC codes 304,390
Distinct SAB=RXNORM NDC codes 304,390

Last Reviewed: January 3, 2011