OrganizationAffiliation resource (FHIR R4)

OrganizationAffiliation is the FHIR R4 resource for defines an affiliation/assotiation/relationship between 2 distinct oganizations, that is not a part-of relationship/sub-division relationship.

Resource	OrganizationAffiliation
FHIR version	R4 (4.0.1)
Canonical URL	http://hl7.org/fhir/StructureDefinition/OrganizationAffiliation
Required elements	none; every top-level element is optional (min 0) in base R4

Example

{
  "resourceType": "OrganizationAffiliation",
  "id": "organizationaffiliation-262c4e0e6fcee5374dcd9dd39b574ed1"
}

Generated by the Pidgeon engine: pidgeon generate OrganizationAffiliation --seed 20260722.

Validation context

strict pidgeon validate grades a OrganizationAffiliation instance against the base R4 structure definition: missing required elements raise REQUIRED_FIELD_MISSING and cardinality violations raise CARDINALITY_MIN or CARDINALITY_MAX.(REQUIRED_FIELD_MISSING)

This answer, in your terminal

pidgeon lookup OrganizationAffiliation

Wire it into your AI agent:

claude mcp add pidgeon -- npx -y @pidgeonhealth/mcp

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