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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

March Release - 03/07/2011

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 02/08/2011
Medi-Span Master Drug Data Base MDDB 02/02/2011
Multum MediSource Lexicon MMSL 02/01/2011
Micromedex RED BOOK MMX 02/07/2011
FDA National Drug Code Directory MTHFDA 02/01/2011
FDA Structured Product Labels MTHSPL 02/25/2011
First DataBank NDDF Plus Source Vocabulary NDDF 02/16/2011
Veterans Health Administration National Drug File - Reference Terminology NDFRT 03/07/2011
SNOMED Clinical Terms (drug information) SNOMEDCT 01/31/2011
Veterans Health Administration National Drug File VANDF 02/03/2011


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

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 08/30/2010


Data Changes

There are no significant data changes for this release.

Data Counts

Term Type or AttributeNumber
Active GPCK forms 302
Active BPCK forms 385
Active SCD forms 19,155
Active SBD forms 16,571
Active RXNORM MIN atoms 3,624
Active RXNORM IN atoms 4,947
Active RXNORM PIN atoms 1,548
Active RXNORM BN atoms 14,978
Active RXNORM DF atoms 100
Obsolete GPCK forms 54
Obsolete BPCK forms 25
Obsolete SCD forms 13,869
Obsolete SBD forms 4,034
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 276,777
Source-asserted NDC codes 786,135
Distinct Source-asserted NDC codes 424,719
SAB=RXNORM NDC codes 229,521
Distinct SAB=RXNORM NDC codes 229,521

Last Reviewed: March 7, 2011