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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

December Release - 12/06/2010

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 11/03/2010
Medi-Span Master Drug Data Base MDDB 11/03/2010
Multum MediSource Lexicon MMSL 11/01/2010
Micromedex RED BOOK MMX 11/01/2010
FDA National Drug Code Directory MTHFDA 11/01/2010
FDA Structured Product Labels MTHSPL 11/29/2010
First DataBank NDDF Plus Source Vocabulary NDDF 11/03/2010
Veterans Health Administration National Drug File VANDF 10/28/2010

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

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 08/17/2009
Veterans Health Administration National Drug File - Reference Terminology NDFRT 11/01/2010
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 302
Active BPCK forms 383
Active SCD forms 19,708
Active SBD forms 16,116
Active RXNORM MIN atoms 3,588
Active RXNORM IN atoms 4,940
Active RXNORM PIN atoms 1,543
Active RXNORM BN atoms 14,523
Active RXNORM DF atoms 100
Obsolete GPCK forms 42
Obsolete BPCK forms 15
Obsolete SCD forms 12,997
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 267,274
Source-asserted NDC codes 599,633
Distinct Source-asserted NDC codes 353,608
SAB=RXNORM NDC codes 302,558
Distinct SAB=RXNORM NDC codes 302,558

Last Reviewed: December 6, 2010