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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

January Release - 01/07/2013

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 11/29/2012
Medi-Span Master Drug Data Base MDDB 11/28/2012
Multum MediSource Lexicon MMSL 12/01/2012
Micromedex RED BOOK MMX 12/03/2012
FDA Structured Product Labels MTHSPL 12/28/2012
FDB MedKnowledge (formerly NDDF Plus) NDDF 12/05/2012
Veterans Health Administration National Drug File - Reference Terminology NDFRT 01/07/2013
Veterans Health Administration National Drug File VANDF 12/03/2012


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

Source NameSABDate Updated
FDA National Drug Code Directory MTHFDA 06/01/2011
Medical Subject Headings (MeSH) MSH 08/28/2012
SNOMED Clinical Terms (drug information) SNOMEDCT 07/31/2012

Data Changes

There are no major data changes for this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 345
Active BPCK forms 434
Active SCD forms 21,487
Active SBD forms 17,191
Active RXNORM MIN atoms 3,797
Active RXNORM IN atoms 7,848
Active RXNORM PIN atoms 1,875
Active RXNORM BN atoms 16,158
Active RXNORM DF atoms 103
Obsolete GPCK forms 78
Obsolete BPCK forms 42
Obsolete SCD forms 13,073
Obsolete SBD forms 4,057
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 304,526
Source-asserted NDC codes 1,188,691
Distinct Source-asserted NDC codes 539,051
SAB=RXNORM NDC codes 190,808
Distinct SAB=RXNORM NDC codes 190,808

Last Reviewed: January 14, 2013