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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

January Release - 01/03/2012

This release of RxNorm is consistent with the 2011AB UMLS Metathesaurus release. For additional information about RxNorm releases, including scripts for loading the RxNorm data into Oracle and MySQL databases, read the RxNorm technical documentation.


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

Source NameSABDate Updated
Gold Standard Drug Database GS 12/04/2011
Medi-Span Master Drug Data Base MDDB 12/07/2011
Multum MediSource Lexicon MMSL 12/01/2011
Micromedex RED BOOK MMX 12/05/2011
FDA Structured Product Labels MTHSPL 12/27/2011
First DataBank NDDF Plus Source Vocabulary NDDF 12/07/2011
Veterans Health Administration National Drug File - Reference Terminology NDFRT 01/03/2012
Veterans Health Administration National Drug File VANDF 11/10/2011


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

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 09/09/2011
FDA National Drug Code Directory MTHFDA 06/01/2011
SNOMED Clinical Terms (drug information) SNOMEDCT 07/31/2011


Data Changes

There are no significant data changes for this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 316
Active BPCK forms 399
Active SCD forms 20,539
Active SBD forms 17,120
Active RXNORM MIN atoms 3,714
Active RXNORM IN atoms 5,010
Active RXNORM PIN atoms 1,569
Active RXNORM BN atoms 15,537
Active RXNORM DF atoms 100
Obsolete GPCK forms 67
Obsolete BPCK forms 38
Obsolete SCD forms 13,054
Obsolete SBD forms 3,864
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 290,734
Source-asserted NDC codes 1,045,633
Distinct Source-asserted NDC codes 491,170
SAB=RXNORM NDC codes 255,043
Distinct SAB=RXNORM NDC codes 255,043

Last Reviewed: April 23, 2012