Substances Co-ordination

Duplicated extension content project

Status: Complete

In the second quarter of 2025, concepts from the substance hierarchy that were used to model clinical drugs were collected from nine National Release Centers. These concepts and their terms were compared amongst each other and the international release. Of the 80 concepts that were found in multiple submissions, 30 were duplicate to current international concepts; almost 50 duplicates were found amongst two or more countries. However, four of these duplicates were rejected as organisms. Countries that had concepts with the earliest effective times were notified of the selection of their respective concept IDs. These concepts were promoted and were released into the international edition starting in the 1 August release and finishing in the 1 October 2025 release.

Single promotions project

Status: In progress

Substance concepts used to model clinical drugs and published only within a single extension were collected from nine NRCs for a total of 880 concepts. These were compared to the international release to check for duplication. Then, SNOMED International staff performed a high-level overview of immediately recognizable issues that could prevent concepts from being internationally applicable. NRCs were asked to further narrow down the list to only those applicable to the international edition of SNOMED CT. This process is currently underway. Promotion of approved concepts is currently in progress.

Extensions identified with substances:

Extension	Point(s) of Contact
Argentina	@ines otegui @Guillermo Reynoso
Austria
Australia	@Dion McMurtrie @Matt Cordell
Canada	@Julie Boutin
India
Norway	@Hanne Fjeldstad Johansen
Spain	@Marta Pavón Garrido
UK	@Stuart Abbott
Uruguay	@Betania Arispe @Rossana Occhiuzzi @Guillermo Reynoso
US	@John Snyder (Unlicensed) @Nicholas McGraw

Supporting Documents:

Document

Link & Details

Combined Substances Worksheet

Combined List June 10th (requires access request) Updated to include more countries June 10th

Tabs:

Single Count Substances: List of substances that currently exist in one extension.
- Action
  - Each country representative has been sent a link to a spreadsheet with the list of substances within their extension which have been used to model medicinal products. Please review the substances for relevance in the international edition. Column B has been provided for comments.

Coincidences pending resolution: Substances in multiple countries where promotion will be required
- Action:
  - SNOMED International is progressing (CRS for Managed Service or RF2 import for non-Managed Service)

Coincidences already resolved: Substances in extensions where there is an International concept
- Action: Individual extensions to review and inactivate extension concept as there is an International concept.

Review of Worksheet and Guidance for Extensions

Internal Review for International Applicability

Substance section of SNOMED CT Editorial Guide

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