Slot resource (FHIR R4)

Slot is the FHIR R4 resource for a slot of time on a schedule that may be available for booking appointments.

Resource	Slot
FHIR version	R4 (4.0.1)
Canonical URL	http://hl7.org/fhir/StructureDefinition/Slot
Required elements	schedule (1..1), status (1..1), start (1..1), end (1..1)

Example

{
  "resourceType": "Slot",
  "id": "slot-8af1012b39f7d19d2388d05f763000d9",
  "schedule": {
    "reference": "Schedule/schedule-3dabc48d35e65871d28935599abbcb1a"
  },
  "status": "busy",
  "start": "2026-07-01T12:00:00.000Z",
  "end": "2026-07-01T12:00:00.000Z"
}

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

Validation context

strict pidgeon validate grades a Slot 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 Slot

Wire it into your AI agent:

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

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