Parameters resource (FHIR R4)

Parameters is the FHIR R4 resource for this resource is a non-persisted resource used to pass information into and back from an [operation](operations.html).

Resource	Parameters
FHIR version	R4 (4.0.1)
Canonical URL	http://hl7.org/fhir/StructureDefinition/Parameters
Required elements	none; every top-level element is optional (min 0) in base R4
IG profiles in this catalog	3

Example

{
  "resourceType": "Parameters",
  "id": "parameters-93a7d300282f3ef6985d1a6034ad892f",
  "parameter": [
    {
      "name": "resourceType",
      "valueString": "Observation"
    },
    {
      "name": "since",
      "valueDateTime": "2026-06-01T12:00:00Z"
    },
    {
      "name": "count",
      "valueInteger": 30
    },
    {
      "name": "includeProvenance",
      "valueBoolean": false
    }
  ]
}

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

Validation context

strict pidgeon validate grades a Parameters 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)
strict Profile validation grades the same instance against an installed IG profile: profile cardinality findings carry FHIR-PROFILE-CARDINALITY and terminology binding findings carry FHIR-PROFILE-BINDING.(FHIR-PROFILE-CARDINALITY)

This answer, in your terminal

pidgeon lookup Parameters

Wire it into your AI agent:

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

Download Post free to browse this reference with generation attached.