Please note:
- This version of the UK Core is a development copy.
- This contains BREAKING CHANGES as a result of the C&TA Sprint 7 Review, and STU2 Sequence ballot reconciliation.
- This version is not yet reviewed for implementation. Other versions are available on the UK Core Version History Guide
- Please follow the guidance on the Contact Us page if you need any assistance.
- A summary of changes is available on the STU3 Sequence Change Log
Identifier Systems
Identifier Systems Usage
Whilst every effort has been made to ensure that the examples are correct and useful, they are not a normative part of the specification.In FHIR, an identifier system is a namespace (usually a URI or OID) that defines the scope and authority of an identifier — it tells you where the identifier comes from and how it should be interpreted.
The NamingSystem resource can be accessed at HL7 R4 NamingSystem.
For guidance on migrating OIDs to FHIR-compliant identifiers, refer to the HL7 Confluence page on Migrating OIDs to FHIR.
| Region / Source | Description | Link |
|---|---|---|
| International | List of global identifier systems in FHIR | HL7 Identifier Registry |
| UK | Curated list of commonly used UK identifier systems | UK Naming Systems Guide |
| UK (OID) | List of UK-specific Object Identifier (OID) systems | HL7 UK Object Identifiers |
| Wales | Wales-specific identifier systems | Data Standards Wales FHIR Implementation Guide |
| England | England-specific identifier systems | NHS England FHIR Implementation Guide |