Oral Chemotherapy Order - Myleran - completed - with reasonCode

{
  "resourceType" : "MedicationRequest",
  "id" : "medrx0306",
  "contained" : [{
    "resourceType" : "Medication",
    "id" : "med0304",
    "code" : {
      "coding" : [{
        "system" : "http://hl7.org/fhir/sid/ndc",
        "code" : "76388-713-25",
        "display" : "MYLERAN, 25 TABLET, FILM COATED in 1 BOTTLE (76388-713-25) (package)"
      }],
      "text" : "Myleran 2mg tablet, film coated"
    }
  }],
  "identifier" : [{
    "use" : "official",
    "system" : "http://www.bmc.nl/portal/prescriptions",
    "value" : "12345689"
  }],
  "status" : "active",
  "intent" : "order",
  "medication" : {
    "reference" : {
      "reference" : "#med0304",
      "display" : "Myleran 2mg tablet"
    }
  },
  "subject" : {
    "reference" : "Patient/pat1",
    "display" : "Donald Duck"
  },
  "authoredOn" : "2015-01-15",
  "requester" : {
    "reference" : "Practitioner/f007",
    "display" : "Patrick Pump"
  },
  "reason" : [{
    "concept" : {
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "92818009",
        "display" : "Chronic myeloid leukemia, disease (disorder)"
      }]
    }
  }],
  "dosageInstruction" : [{
    "sequence" : 1,
    "text" : "6 mg PO daily for remission induction; adjust dosage to white blood cell (WBC) count.  With hold treatment if WBC is less than 15,000/µL; resume when WBC is greater than 50,000/µL",
    "timing" : {
      "repeat" : {
        "frequency" : 1,
        "period" : 1,
        "periodUnit" : "d"
      }
    },
    "route" : {
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "26643006",
        "display" : "Oral route (qualifier value)"
      }]
    },
    "doseAndRate" : [{
      "type" : {
        "coding" : [{
          "system" : "http://terminology.hl7.org/CodeSystem/dose-rate-type",
          "code" : "ordered",
          "display" : "Ordered"
        }]
      },
      "doseQuantity" : {
        "value" : 6,
        "unit" : "mg",
        "system" : "http://unitsofmeasure.org",
        "code" : "mg"
      }
    }]
  }]
}