{
  "resourceType": "StructureDefinition",
  "url": "https://example.org/fhir/StructureDefinition/MyUSCorePatientProfile",
  "name": "MedicarePatient",
  "status": "active",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Patient",
  "baseDefinition": "http://hl7.org/fhir/us/core/StructureDefinition/us-core-patient",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Patient.identifier",
        "path": "Patient.identifier",
        "slicing": {
          "discriminator": [
            {
              "type": "pattern",
              "path": "$this"
            }
          ],
          "rules": "open"
        }
      },
      {
        "id": "Patient.identifier:medicarenumber",
        "path": "Patient.identifier",
        "sliceName": "medicarenumber",
        "short": "Medicare Number",
        "definition": "Medicare identification number for Medicare patients",
        "max": "1",
        "patternIdentifier": {
          "use": "official",
          "system": "http://hl7.org/fhir/sid/us-mbi"
        }
      }
    ]
  }
}