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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

November Release - 11/05/2012

This release of RxNorm is consistent with the 2012AB 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 09/27/2012
Medi-Span Master Drug Data Base MDDB 09/26/2012
Multum MediSource Lexicon MMSL 10/01/2012
Micromedex RED BOOK MMX 10/01/2012
Medical Subject Headings (MeSH) MSH 08/28/2012
FDA Structured Product Labels MTHSPL 10/26/2012
FDB MedKnowledge (formerly NDDF Plus) NDDF 10/03/2012
Veterans Health Administration National Drug File - Reference Terminology NDFRT 11/05/2012
Veterans Health Administration National Drug File VANDF 10/01/2012


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

Source NameSABDate Updated
FDA National Drug Code Directory MTHFDA 06/01/2011
SNOMED Clinical Terms (drug information) SNOMEDCT 07/31/2012


Data Changes

There are no significant data changes in this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 333
Active BPCK forms 424
Active SCD forms 20,947
Active SBD forms 16,813
Active RXNORM MIN atoms 3,790
Active RXNORM IN atoms 7,464
Active RXNORM PIN atoms 1,842
Active RXNORM BN atoms 16,064
Active RXNORM DF atoms 103
Obsolete GPCK forms 77
Obsolete BPCK forms 48
Obsolete SCD forms 13,019
Obsolete SBD forms 4,059
Obsolete RXNORM MIN atoms 0
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 0
Obsolete RXNORM DF atoms 52
OCD atoms 303,287
Source-asserted NDC codes 1,094,575
Distinct Source-asserted NDC codes 517,795
SAB=RXNORM NDC codes 219,468
Distinct SAB=RXNORM NDC codes 219,468

Last Reviewed: November 5, 2012