ATC/DDD request submission
All ATC/DDD-related requests should be submitted electronically here.
This applies to requests for:
- New ATC codes
- New DDDs
- Alterations
- Objections to temporary decisions of the WHO Advisory Group for Drug Statistics Methodology that are open for comments/objections (see current list and deadlines here).
Before starting your request, applicants are encouraged to:
- Review the ATC/DDD Guidelines here to ensure that the request fulfils the relevant criteria and documentation requirements
- Prepare and attach supporting documentation relevant to the request, such as Summary of Product Characteristics (SmPC), prescribing information (PI), or equivalent product information for the medicinal product(s) on which the request is based
- Prepare and attach an appropriate scientific rationale supporting the request, particularly for alterations and objections
- Ensure that the request is based on one or more medicinal products for which marketing authorisation (MA) has been granted or for which a marketing authorisation application has been formally submitted to a competent medicines regulatory authority. MA must have been granted before the establishment of a complete ATC code at the fifht level or the assignment of a DDD my be considered. Further information regarding MA status requirements can be found here.
Applicants are also encouraged to propose the most appropriate ATC fourth level for requested ATC codes whenever relevant.
For requests involving new ATC codes, an established official name for the relevant active ingredient(s), preferably an INN, is important to facilitate assignment of an appropriate ATC descriptor.
If you have questions or require further clarification regarding the ATC/DDD methodology, submission process, or documentation requirements, please feel free to contact the ATC/DDD Centre at whocc@fhi.no.
Last updated: 2026-07-16