A SNOMED CT extension that is maintained and distributed by SNOMED International.
- Identifiers of components in an extension created and maintained by SNOMED International are not required to include a namespace identifier.
- SNOMED CT International Extensions contain components and reference set members which belong to modules that are not included in the SNOMED CT International Edition, but which are dependent on the modules in the International Edition. While these extensions are not part of the International Edition, they are considered to be part of the overall International Release. released by SNOMED International contain components and derivatives that extend, rather than being an essential part of, the SNOMED CT International Edition. However these SNOMED CT International Extensions are considered to be part of the overall International Release.