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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

July Release - 07/02/2012

This release of RxNorm is consistent with the 2012AA 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 06/03/2012
Medi-Span Master Drug Data Base MDDB 06/06/2012
Multum MediSource Lexicon MMSL 06/01/2012
Micromedex RED BOOK MMX 06/04/2012
FDA Structured Product Labels MTHSPL 06/26/2012
FDB MedKnowledge (formerly NDDF Plus) NDDF 06/06/2012
Veterans Health Administration National Drug File - Reference Terminology NDFRT 07/02/2012
Veterans Health Administration National Drug File VANDF 06/06/2012


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

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 02/01/2012
FDA National Drug Code Directory MTHFDA 06/01/2011
SNOMED Clinical Terms (drug information) SNOMEDCT 01/31/2012


Data Changes

SAB=MTHFDA NDCs are no longer being propagated to SAB=RXNORM concepts. As a result, the count of SAB=RXNORM normalized NDCs dropped by approximately 50,000 for this release. Additionally, about 70,000 SAB=MTHFDA have been marked as suppressed (SUPPRESS=O), and about 30,000 SAB=MTHFDA atoms (in MRCONSO.RRF) have been marked as suppressed.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 324
Active BPCK forms 407
Active SCD forms 20,668
Active SBD forms 16,647
Active RXNORM MIN atoms 3,758
Active RXNORM IN atoms 5,037
Active RXNORM PIN atoms 1,653
Active RXNORM BN atoms 15,884
Active RXNORM DF atoms 102
Obsolete GPCK forms 76
Obsolete BPCK forms 47
Obsolete SCD forms 13,061
Obsolete SBD forms 4,084
Obsolete RXNORM MIN atoms 0
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 0
Obsolete RXNORM DF atoms 53
OCD atoms 299,610
Source-asserted NDC codes 1,073,100
Distinct Source-asserted NDC codes 505,599
SAB=RXNORM NDC codes 213,227
Distinct SAB=RXNORM NDC codes 213,227

Last Reviewed: July 2, 2012