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Explore and Make use of Nationally Defined Messaging APIs


Find an organisation

Use case for finding an organisation resource by business identity



The consumer system:

API usage

Resolve (zero or more) Organization resources using a business identifier (for example, ODS organization code).

Request operation

The consumer system:

  • SHALL populate the [system] field with a valid organization identifier system URL (for example,

  • apply percent encoding when constructing the request URL as indicated in RFC 3986 Section 2.1. This will ensure that downstream servers correctly handle the pipe | character which must be used in the identifier parameter value below.

FHIR relative request

GET /Organization?identifier=[system]|[value]

FHIR absolute request

GET https://[proxy_server]/https://[provider_server]/[fhir_base]/Organization?identifier=[system]|[value]

Request headers

Consumers SHALL include the following additional HTTP request headers:

Header Value
Ssp-TraceID Consumer’s TraceID (for example, GUID/UUID)
Ssp-From Consumer’s ASID
Ssp-To Provider’s ASID
Ssp-InteractionID urn:nhs:names:services:gpconnect:fhir:rest:search:organization-1

Payload request body


Error handling

Provider systems:

  • SHALL return a GPConnect-OperationOutcome-1 resource that provides additional detail when one or more request fields are corrupt or a specific business rule/constraint is breached

For example, the:

  • Business identifier [system] is not recognised/supported by the provider system
  • Business identifier fails any structural validation checks (for example, length and check digits)

Request response

Response headers

Provider systems are not expected to add any specific headers beyond that described in the HTTP and FHIR® standards.

Payload response body

Provider systems:

  • SHALL return a 200 OK HTTP status code on successful execution of the operation
  • SHALL return zero or more matching Organization resources in a Bundle of type searchset
  • SHALL return Organization resources that conform to the CareConnect-GPC-Organization-1 profile

  • SHALL populate the following Organization fields:
    • meta.profile with the profile URI
    • versionId with the current version of each Organization resource.
    • identifier with relevant business identifiers (for example, ODS code) for each Organization resource.
    • name
    • address where available
    • telecom where available
  • SHALL meet General FHIR resource population requirements populating all fields where data is available, excluding those listed below

  • SHALL NOT populate the following fields:
    • contact
    • endpoint
  "resourceType": "Bundle",
  "type": "searchset",
  "entry": [
      "resource": {
        "resourceType": "Organization",
        "id": "23",
        "meta": {
          "versionId": "636064088098730113",
          "profile": [
        "identifier": [
            "system": "",
            "value": "A00001"
        "name": "The Trevelyan Practice",
        "address": [
            "line": [
              "Trevelyan Square",
              "Boar Ln"
            "city": "Leeds",
            "district": "West Yorkshire",
            "postalCode": "LS1 6AE"
        "telecom": [
            "system": "phone",
            "value": "03003035678",
            "use": "work"

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