NHS North West Genomics
2.2.5 - ci-build
NHS North West Genomics
2.2.5 - ci-build
NHS North West Genomics - Local Development build (v2.2.5) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions
| Official URL: https://fhir.nwgenomics.nhs.uk/StructureDefinition/MedicalRecordNumber | Version: 2.2.5 | ||||
| Draft as of 2026-11-05 | Computable Name: MedicalRecordNumber | ||||
LOCAL PATIENT IDENTIFIER - a hospital-assigned identifier, not a nationally-issued number. There is no single national OID or value format; each Trust's PAS/EPR assigns its own.
Ubiquitous terms: Hospital Number, Unit Number, Patient ID, MRN, Case Number.
| Ubiquitous Term | Field | HL7 FHIR Identifier | Value / OID / URI | HL7 v2 CX | HL7 FHIR Example | HL7 v2 Example |
|---|---|---|---|---|---|---|
| MRN / Hospital Number | Number | value | {local patient identifier} | CX.1 | ABC1234 | ABC1234 |
| - | System | system | FHIR prefers a URI. OID also permitted - no single national OID, locally assigned by PAS/EPR or within XDS. | - | https://fhir.alderhey.nhs.uk/Id/medical-record-number | |
| - | Type | type.coding.code | MR (fixed) | CX.5 | MR | MR |
| - | - | type.coding.system | http://terminology.hl7.org/CodeSystem/v2-0203 | - | http://terminology.hl7.org/CodeSystem/v2-0203# | |
| ODS Code / Trust Code | NHS Trust ODS Code | assigner.identifier.value | {ods code} | CX.4 | RBS | RBS |
| - | - | assigner.identifier.system | https://fhir.nhs.uk/Id/ods-organization-code (fixed); OID 2.16.840.1.113883.2.1.3.2.4.18.48 |
- | https://fhir.nhs.uk/Id/ods-organization-code |
633^^^R0A^MR
{
"type" : {
"coding" : [
{
"system" : "http://terminology.hl7.org/CodeSystem/v2-0203",
"code" : "MR"
}
]
},
"system" : "urn:oid:1.2.840.114350.1.13.611.3.7.5.737384.14",
"value" : "633",
"assigner" : {
"identifier" : {
"system" : "https://fhir.nhs.uk/Id/ods-organization-code",
"value" : "R0A"
}
}
}
| Name | System |
|---|---|
| Manchester University NHS Foundation Trust (MFT) - EPIC | |
| Liverpool Women's NHS Foundation Trust (LWT) - Meditech | |
| Alder Hey - Meditech |
Usages:
You can also check for usages in the FHIR IG Statistics
Description Differentials, Snapshots, and other representations.
| Name | Flags | Card. | Type | Description & Constraints Filter:  |
|---|---|---|---|---|
  Identifier |
0..* | CorrelationIdentifier | An identifier intended for computation | |
  use |
0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known . | |
 type |
0..1 | CodeableConcept | Description of identifier Binding: NW IdentifierType (required) Fixed Value: | |
| system |
0..1 | uri | Generic system to represent MRN in NHS Trusts. Can be replaced with a system specified by NHS Trust. For trusts with a PAS/EPR with a FHIR API (e.g. EPIC, Meditech, Cerner, etc), this value will be defined in that API. Example General: http://www.acme.com/identifiers/patient | |
| value |
1..1 | string | The value MUST be unique to the organisation Example General: 123456 | |
  assigner |
1..1 | Reference(Organization) | Assigning Facility | |
 identifier |
1..1 | Identifier | Logical reference, when literal reference is not known | |
| use |
0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known . | |
| system |
1..1 | uri | The namespace for the identifier value Required Pattern: https://fhir.nhs.uk/Id/ods-organization-code (extensions allowed) | |
| value |
1..1 | string | The value that is unique Example General: 123456 Example Manchester University NHS Foundation Trust: R0A | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Identifier.use | Base | required | IdentifierUse | 📍4.0.1 | FHIR Std. |
| Identifier.type | Base | required | NW IdentifierType | 📦2.2.5 | This IG |
| Identifier.assigner.identifier.use | Base | required | IdentifierUse | 📍4.0.1 | FHIR Std. |
| Id | Grade | Path(s) | Description | Expression |
This structure is derived from CorrelationIdentifier
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
 Identifier |
CorrelationIdentifier | |||
| type |
0..1 | CodeableConcept | Description of identifier Fixed Value: | |
| system |
0..1 | uri | Generic system to represent MRN in NHS Trusts. Can be replaced with a system specified by NHS Trust. For trusts with a PAS/EPR with a FHIR API (e.g. EPIC, Meditech, Cerner, etc), this value will be defined in that API. | |
| assigner |
1..1 | Reference(Organization) | Assigning Facility | |
| Documentation for this format | ||||
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Identifier |
0..* | CorrelationIdentifier | An identifier intended for computation | |
| id |
0..1 | string | Unique id for inter-element referencing | |
 extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| use |
0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known . | |
| type |
0..1 | CodeableConcept | Description of identifier Binding: NW IdentifierType (required) Fixed Value: | |
| system |
0..1 | uri | Generic system to represent MRN in NHS Trusts. Can be replaced with a system specified by NHS Trust. For trusts with a PAS/EPR with a FHIR API (e.g. EPIC, Meditech, Cerner, etc), this value will be defined in that API. Example General: http://www.acme.com/identifiers/patient | |
| value |
1..1 | string | The value MUST be unique to the organisation Example General: 123456 | |
| period |
0..1 | Period | Time period when id is/was valid for use | |
| assigner |
1..1 | Reference(Organization) | Assigning Facility | |
| id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| reference |
C | 0..1 | string | Literal reference, Relative, internal or absolute URL |
| type |
0..1 | uri | Type the reference refers to (e.g. "Patient") Binding: ResourceType (extensible): Aa resource (or, for logical models, the URI of the logical model). | |
| identifier |
1..1 | Identifier | Logical reference, when literal reference is not known | |
 id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| use |
0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known . | |
| type |
0..1 | CodeableConcept | Description of identifier Binding: Identifier Type Codes (extensible): A coded type for an identifier that can be used to determine which identifier to use for a specific purpose. | |
| system |
1..1 | uri | The namespace for the identifier value Required Pattern: https://fhir.nhs.uk/Id/ods-organization-code (extensions allowed) | |
| value |
1..1 | string | The value that is unique Example General: 123456 Example Manchester University NHS Foundation Trust: R0A | |
| period |
0..1 | Period | Time period when id is/was valid for use | |
| assigner |
0..1 | Reference(Organization) | Organization that issued id (may be just text) | |
| display |
0..1 | string | Text alternative for the resource | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Identifier.use | Base | required | IdentifierUse | 📍4.0.1 | FHIR Std. |
| Identifier.type | Base | required | NW IdentifierType | 📦2.2.5 | This IG |
| Identifier.assigner.type | Base | extensible | ResourceType | 📍4.0.1 | FHIR Std. |
| Identifier.assigner.identifier.use | Base | required | IdentifierUse | 📍4.0.1 | FHIR Std. |
| Identifier.assigner.identifier.type | Base | extensible | IdentifierType | 📍4.0.1 | FHIR Std. |
| Id | Grade | Path(s) | Description | Expression |
This structure is derived from CorrelationIdentifier
Key Elements View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Identifier |
0..* | CorrelationIdentifier | An identifier intended for computation | |
| use |
0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known . | |
| type |
0..1 | CodeableConcept | Description of identifier Binding: NW IdentifierType (required) Fixed Value: | |
| system |
0..1 | uri | Generic system to represent MRN in NHS Trusts. Can be replaced with a system specified by NHS Trust. For trusts with a PAS/EPR with a FHIR API (e.g. EPIC, Meditech, Cerner, etc), this value will be defined in that API. Example General: http://www.acme.com/identifiers/patient | |
| value |
1..1 | string | The value MUST be unique to the organisation Example General: 123456 | |
| assigner |
1..1 | Reference(Organization) | Assigning Facility | |
| identifier |
1..1 | Identifier | Logical reference, when literal reference is not known | |
| use |
0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known . | |
| system |
1..1 | uri | The namespace for the identifier value Required Pattern: https://fhir.nhs.uk/Id/ods-organization-code (extensions allowed) | |
| value |
1..1 | string | The value that is unique Example General: 123456 Example Manchester University NHS Foundation Trust: R0A | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Identifier.use | Base | required | IdentifierUse | 📍4.0.1 | FHIR Std. |
| Identifier.type | Base | required | NW IdentifierType | 📦2.2.5 | This IG |
| Identifier.assigner.identifier.use | Base | required | IdentifierUse | 📍4.0.1 | FHIR Std. |
| Id | Grade | Path(s) | Description | Expression |
Differential View
This structure is derived from CorrelationIdentifier
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Identifier |
CorrelationIdentifier | |||
| type |
0..1 | CodeableConcept | Description of identifier Fixed Value: | |
| system |
0..1 | uri | Generic system to represent MRN in NHS Trusts. Can be replaced with a system specified by NHS Trust. For trusts with a PAS/EPR with a FHIR API (e.g. EPIC, Meditech, Cerner, etc), this value will be defined in that API. | |
| assigner |
1..1 | Reference(Organization) | Assigning Facility | |
| Documentation for this format | ||||
Snapshot ViewView
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Identifier |
0..* | CorrelationIdentifier | An identifier intended for computation | |
| id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| use |
0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known . | |
| type |
0..1 | CodeableConcept | Description of identifier Binding: NW IdentifierType (required) Fixed Value: | |
| system |
0..1 | uri | Generic system to represent MRN in NHS Trusts. Can be replaced with a system specified by NHS Trust. For trusts with a PAS/EPR with a FHIR API (e.g. EPIC, Meditech, Cerner, etc), this value will be defined in that API. Example General: http://www.acme.com/identifiers/patient | |
| value |
1..1 | string | The value MUST be unique to the organisation Example General: 123456 | |
| period |
0..1 | Period | Time period when id is/was valid for use | |
| assigner |
1..1 | Reference(Organization) | Assigning Facility | |
| id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| reference |
C | 0..1 | string | Literal reference, Relative, internal or absolute URL |
| type |
0..1 | uri | Type the reference refers to (e.g. "Patient") Binding: ResourceType (extensible): Aa resource (or, for logical models, the URI of the logical model). | |
| identifier |
1..1 | Identifier | Logical reference, when literal reference is not known | |
| id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url | |
| use |
0..1 | code | usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known . | |
| type |
0..1 | CodeableConcept | Description of identifier Binding: Identifier Type Codes (extensible): A coded type for an identifier that can be used to determine which identifier to use for a specific purpose. | |
| system |
1..1 | uri | The namespace for the identifier value Required Pattern: https://fhir.nhs.uk/Id/ods-organization-code (extensions allowed) | |
| value |
1..1 | string | The value that is unique Example General: 123456 Example Manchester University NHS Foundation Trust: R0A | |
| period |
0..1 | Period | Time period when id is/was valid for use | |
| assigner |
0..1 | Reference(Organization) | Organization that issued id (may be just text) | |
| display |
0..1 | string | Text alternative for the resource | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Identifier.use | Base | required | IdentifierUse | 📍4.0.1 | FHIR Std. |
| Identifier.type | Base | required | NW IdentifierType | 📦2.2.5 | This IG |
| Identifier.assigner.type | Base | extensible | ResourceType | 📍4.0.1 | FHIR Std. |
| Identifier.assigner.identifier.use | Base | required | IdentifierUse | 📍4.0.1 | FHIR Std. |
| Identifier.assigner.identifier.type | Base | extensible | IdentifierType | 📍4.0.1 | FHIR Std. |
| Id | Grade | Path(s) | Description | Expression |
This structure is derived from CorrelationIdentifier
Other representations of profile: CSV, Excel, Schematron