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Unified Medical Language System® (UMLS®)

ATC Source Information

Click on a topic below the Source Synopsis section to display details.

Source Synopsis

Web site:
http://www.who.int/classifications/atcddd/en/

Authority
The World Health Organization Collaborating Center for Drug Statistics Methodology produces and maintains the Anatomical Therapeutic Chemical Classification System with Defined Daily Doses (ATC/DDD).

The RxNorm includes ATC information only.

Purpose
ATC classifies therapeutic drugs to enable drug research and to improve the quality of drug use.

Description
ATC classifies drugs at five different levels. Each level is a different grouping of drugs. Groupings of active substances include the organ or system on which the drug acts as well as therapeutic, pharmacological, and chemical properties of the drug.

RxNorm Scope
The RxNorm representation of ATC includes ingredients and drug classes. RxNorm contains approximately 4,889 ingredients and 1,260 drug classes from ATC.

Update Frequency
ATC is updated annually.

RxNorm Update Frequency
ATC is updated annually in RxNorm, typically in the February RxNorm monthly release.

Sites Consulted

  1. WHO | The Anatomical Therapeutic Chemical Classification System with Defined Daily Doses (ATC/DDD). [Geneva]: World Health Organization; c2018 [cited 2018 Dec 7]. Available from: https://www.who.int/classifications/atcddd/en/.
  2. WHOCC - Home [Internet]. Oslo: WHO Collaborating Centre for Drug Statistics Methodology [updated 2018 Nov 26]. WHOCC - Structure and Principles; [updated 2018 Feb 15; cited 2018 Dec 7]. Available from: https://www.whocc.no/atc/structure_and_principles/.

Metadata

Field Value
Short NameAnatomical Therapeutic Chemical Classification System
FamilyATC
Source Restriction Level0
LanguageENG
License ContactWHO Collaborating Centre for Drug Statistics Methodology
Norwegian Institute of Public Health
P.O.Box 4404 Nydalen
Oslo
Norway
0403
+47 21 07 81 60
+47 21 07 81 46
whocc@fhi.no
http://www.whocc.no/copyright_disclaimer/
Content ContactWHO Collaborating Centre for Drug Statistics Methodology
Norwegian Institute of Public Health
P.O.Box 4404 Nydalen
Oslo
Norway
0403
+47 21 07 81 60
+47 21 07 81 46
whocc@fhi.no
http://www.whocc.no/

Source Representation (currently unavailable)

RxNorm Representation (currently unavailable)

Data Examples with MySQL Queries

This section lists source terminology specific data examples and the MySQL queries used to obtain the data. For more information about RxNorm data and files, see the RxNorm Technical Documentation.

Names and Codes in RXNCONSO.RRF

Here are sample source terminology code, source string, RxNorm Concept Unique Identifier (RXCUI), RxNorm string, RxNorm term type (TTY), and suppress values.

SOURCE_CODE SOURCE_STR RXCUI RXNORM_STR RXNORM_TTY SUPPRESS
C01EB16 ibuprofen 5640 Ibuprofen IN N
G02CC01 ibuprofen 5640 Ibuprofen IN N
M02AA13 ibuprofen 5640 Ibuprofen IN N
M01AE01 ibuprofen 5640 Ibuprofen IN N

Here is the MySQL query to retrieve the data above:

SELECT distinct rc1.code as source_code, rc1.str as source_str, rc1.rxcui, rc2.str as rxnorm_str, rc2.tty as rxnorm_tty, rc2.suppress
FROM rxnconso rc1, rxnconso rc2
WHERE rc1.code in ('C01EB16', 'G02CC01', 'M01AE01', 'M02AA13')
     AND rc1.sab = 'ATC'
     AND rc1.rxcui = rc2.rxcui
     AND rc2.sab = 'RXNORM';

Names and Relationships in RXNCONSO.RRF and RXNREL.RRF

Here are sample source terminology code, source string, RXCUI, relationship name, RxNorm term type (TTY), brand name, and suppress values.

SOURCE_CODE SOURCE_STR RXCUI RELA RXNORM_TTY BN SUPPRESS
C01EB16 ibuprofen 5640 has_tradename BN MIdol Cramps & Bodyaches N
C01EB16 ibuprofen 5640 has_tradename BN Dragon Tabs N
C01EB16 ibuprofen 5640 has_tradename BN Caldolor N
C01EB16 ibuprofen 5640 has_tradename BN Counteract IB N

Here is the MySQL query to retrieve the data above:

SELECT distinct rc1.code as source_code, rc1.str as source_str, rc1.rxcui, rr.rela, rc2.tty as rxnorm_tty, rc2.str as bn, rc2.suppress
FROM rxnconso rc1, rxnrel rr, rxnconso rc2
WHERE rc1.code = 'C01EB16'
     AND rc1.sab = 'ATC'
     AND rc1.rxcui = rr.rxcui2
     AND rr.rela = 'has_tradename'
     AND rr.rxcui1 = rc2.rxcui
     AND rc2.sab = 'RXNORM'
     AND rc2.tty = 'BN'
     ORDER BY suppress;

Last Reviewed: June 10, 2019