SearchParameter resource (FHIR R4)

SearchParameter is the FHIR R4 resource for a search parameter that defines a named search item that can be used to search/filter on a resource.

Resource	SearchParameter
FHIR version	R4 (4.0.1)
Canonical URL	http://hl7.org/fhir/StructureDefinition/SearchParameter
Required elements	url (1..1), name (1..1), status (1..1), description (1..1), code (1..1), base (1..*), type (1..1)

Example

{
  "resourceType": "SearchParameter",
  "id": "searchparameter-9fbec2c2e03b80554bd73b1c8d47f45f",
  "url": "http://example.org/pidgeon/synthetic",
  "name": "Synthetic value",
  "status": "draft",
  "description": "Synthetic value",
  "code": "synthetic",
  "base": [
    "Account"
  ],
  "type": "number"
}

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

Validation context

strict pidgeon validate grades a SearchParameter 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 SearchParameter

Wire it into your AI agent:

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

Download Post free to browse this reference with generation attached.