Read more about SNOMED CT and derivative products on Delen.
Email questions or feedback to information.standards@nhs.net.
SNOMED CT UK Clinical Edition Cross-map Historical Files, RF2: Full
SNOMED CT UK Clinical Edition, RF2: Delta
SNOMED CT UK Clinical Edition, RF2: Full, Snapshot & Delta
SNOMED CT UK Drug Extension, RF2: Delta
SNOMED CT UK Drug Extension, RF2: Full, Snapshot & Delta
SNOMED CT UK Monolith Edition, RF2: Snapshot
We want to update you on SNOMED International's proposal to increase the maximum length of Fully Specified Name (FSN) and Synonym descriptions from 255 to 4,096 characters. More information about this proposal is available in the Delen news article.
The change will affect UK users of content from SNOMED International’s Medicinal Product Hierarchy, whether taken from the SNOMED CT International Edition or the SNOMED CT UK Edition. However, it will not affect the NHS dictionary of medicines and devices (dm+d), and we do not plan to make any dm+d changes in response to this proposal.
We are reviewing how this change might affect FSNs in the SNOMED CT UK Drug Extension, but we do not expect it to affect Preferred Terms (PTs) in the UK Drug Extension.
SNOMED International currently plan to implement this change in January 2026, with it taking effect in April 2026 UK releases.
If UK stakeholders need more time to implement this change or have any questions or concerns, contact SNOMED International directly at:
We also request that UK stakeholders copy:
so NHS England can stay informed of any feedback.
14 January 2025 9:00 am
Read older category news in the news archive.
Retired cross-map RF2 files, Full release type only.
There is a release per retired cross-map containing the extended map reference set release file and associated documentation.
The data contained within the releases are for reporting or data warehousing - the maps should not be used for live data processing. Active cross-maps can be found in the main Clinical Edition RF2 releases.
Status: Supported Product
SNOMED CT UK Clinical Edition in Release Format 2 (RF2), release type Delta only.
Releases of the UK Clinical Extension and the International release. Each release also includes refsets, cross-maps and added-value files.
Release type Delta provides only the changes between this and the last release, including any new components.
Find SNOMED CT UK Clinical Extension release documentation and SNOMED CT UK Edition product information on Delen.
Status: Supported Product
Read more on the SNOMED CT Releases: Important Notices & Known Issues page on Delen.
SNOMED CT UK Clinical Edition in Release Format 2 (RF2) - all release types.
Releases of the UK Clinical Extension and the International release. Each release also includes refsets, cross-maps and added-value files.
All RF2 release types – Full, Snapshot and Delta – are included.
Find SNOMED CT UK Clinical Extension release documentation and SNOMED CT UK Edition product information on Delen.
Status: Supported Product
Read more on the SNOMED CT Releases: Important Notices & Known Issues page on Delen.
SNOMED CT UK Drug Extension in Release Format 2 (RF2), release type Delta only.
RF2 release type Delta, drug-only refsets and added-value files are included in each release.
Find SNOMED CT UK Drug Extension release documentation and SNOMED CT UK Edition product information on Delen.
These releases do not include the UK Clinical Extension or International release.
Status: Supported Product
Read more on the SNOMED CT Releases: Important Notices & Known Issues page on Delen.
SNOMED CT UK Drug Extension in Release Format 2 (RF2), all release types.
All RF2 release types (Full, Snapshot and Delta), drug-only refsets and added-value files are included in each release.
Find SNOMED CT UK Drug Extension release documentation and SNOMED CT UK Edition product information on Delen.
These releases do not include the UK Clinical Extension or International release.
Status: Supported Product
Read more on the SNOMED CT Releases: Important Notices & Known Issues page on Delen.
An integrated, fully merged release of the SNOMED CT UK Clinical Extension, the UK Drug Extension, the UK Pathology Extension and the International Edition as a single set of files in Release Format 2 (RF2).
The merged tables have been post-processed to resolve the duplicates and conflicts that occur across snapshots when they are distributed separately.
Find supporting documentation for the UK extensions on Delen:
Status: Draft for Trial Use
Releases of new or updated terminology and classification products, or their derivatives, in draft, beta, preview and proof-of-concept form.
These releases give implementors and suppliers previews of updates and developments.
Materials made available here are for evaluation only and might never transition to production versions.
Email questions or feedback to information.standards@nhs.net.
Status: Technology Preview