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Unified Medical Language System® (UMLS®)

RxNorm Release Notes

March Release - 03/01/2010

This release of RxNorm is consistent with the 2009AB 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 02/02/2010
Medi-Span Master Drug Data Base MDDB 02/03/2010
Multum MediSource Lexicon MMSL 02/01/2010
Micromedex DRUGDEX MMX 02/01/2010
FDA National Drug Code Directory MTHFDA 02/01/2010
FDA Structured Product Labels MTHSPL 02/22/2010
First DataBank NDDF Plus Source Vocabulary NDDF 02/05/2010
SNOMED Clinical Terms (drug information) SNOMED CT 01/31/2010
Veterans Health Administration National Drug File VANDF 01/25/2010

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

Source NameSABDate Updated
Medical Subject Headings (MeSH) MSH 08/17/2009

Data Changes

There are no significant data changes for this release. 

Data Counts

Term Type or AttributeNumber
Active GPCK forms 275
Active BPCK forms 349
Active SCD forms 18,955
Active SBD forms 15,527
Active RXNORM IN atoms 4,763
Active RXNORM PIN atoms 1,517
Active RXNORM BN atoms 13,587
Active RXNORM DF atoms 101
Obsolete GPCK forms 34
Obsolete BPCK forms 15
Obsolete SCD forms 12,431
Obsolete SBD forms 4,005
Obsolete RXNORM IN atoms 0
Obsolete RXNORM PIN atoms 0
Obsolete RXNORM BN atoms 0
Obsolete RXNORM DF atoms 54
OCD atoms 257,547
Source-asserted NDC codes 544,413
Distinct Source-asserted NDC codes 337,086
SAB=RXNORM NDC codes 282,024
Distinct SAB=RXNORM NDC codes 282,024

Last Reviewed: March 1, 2010