Terminology products
NHS England is responsible for the UK implementation and management of SNOMED CT, the Read Codes, and other terminology products used in health and care. This includes associated tools and derivative resources.
NHS England maintains the NHS Dictionary of Medicines and Devices (dm+d) in partnership with the NHS Business Services Authority.
News and release notices
SNOMED CT human-readable subset - UK Drug Extension
A new release of item SNOMED CT human-readable subset - UK Drug Extension is available.
SNOMED CT UK Query Table and History Substitution Table
A new release of item SNOMED CT UK Query Table and History Substitution Table is available.
UK Drug bonus files
A new release of item UK Drug bonus files is available.
SNOMED CT UK Monolith Edition, RF2: Snapshot
A new release of item SNOMED CT UK Monolith Edition, RF2: Snapshot is available.
SNOMED CT UK Drug Extension, RF2
New releases are available:
Duplicate map entries in SNOMED CT to ICD-10 mapping file 41.2.0
NHS England has identified an issue in the SNOMED CT to ICD-10 mapping file included in the SNOMED CT UK Edition 41.2.0 release. The file der2_iisssciRefset_ExtendedMapUKCLFull_GB1000000.txt contains duplicate map entries.
A corrected SNOMED CT to ICD-10 mapping file will be released on 24 December 2025 as part of the 41.3.0 release.
For questions or support, contact: support.digitalservices@nhs.net
SNOMED CT UK Clinical Edition, RF2
New releases are available:
SNOMED CT UK Monolith Edition, RF2: Snapshot
A new release of item SNOMED CT UK Monolith Edition, RF2: Snapshot is available.
Increasing SNOMED International description length limits
SNOMED International has confirmed the planned change to increase the maximum length of Fully Specified Name (FSN) and Synonym descriptions from 255 characters to 4,096 characters.
This change will be implemented in the 1 July 2026 International Edition release and will come into effect in the October 2026 UK Edition release.
See the news article on Delen for more information.
NHS England is seeking views from SNOMED CT users in the UK through a survey to help identify if additional information or support may be needed to prepare for the change, and to understand the most effective ways to communicate and share that information.
Your feedback will help NHS England decide whether further guidance or engagement is required to support users beyond that which SNOMED International is providing.
Please complete the survey by 5pm on Wednesday 10 December 2025.
If you have any issues completing the survey, contact: information.standards@nhs.net
Read older news and release notices in the news archive.