NamingSystem resource (FHIR R4)

NamingSystem is the FHIR R4 resource for a curated namespace that issues unique symbols within that namespace for the identification of concepts, people, devices, etc.

Resource	NamingSystem
FHIR version	R4 (4.0.1)
Canonical URL	http://hl7.org/fhir/StructureDefinition/NamingSystem
Required elements	name (1..1), status (1..1), kind (1..1), date (1..1), uniqueId (1..*)

Example

{
  "resourceType": "NamingSystem",
  "id": "namingsystem-aaf64388774b07c83c98c468a04ff6a0",
  "name": "Synthetic value",
  "status": "draft",
  "kind": "codesystem",
  "date": "2026-07-01T12:00:00Z",
  "uniqueId": [
    {
      "type": "oid",
      "value": "Synthetic value"
    }
  ]
}

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

Validation context

strict pidgeon validate grades a NamingSystem 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 NamingSystem

Wire it into your AI agent:

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

Download Post free to browse this reference with generation attached.