{
  "resourceType": "Observation",
  "id": "aed6f48f-9a73-49e4-bfbe-4a6b9b67b9ef",
  "meta": {
    "versionId": "1",
    "lastUpdated": "2021-03-12T15:53:38.611+00:00",
    "source": "#Ekl0bxZEvVDy25Sx"
  },
  "status": "final",
  "category": [
    {
      "coding": [
        {
          "system": "http://terminology.hl7.org/CodeSystem/observation-category",
          "code": "laboratory",
          "display": "laboratory"
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  ],
  "code": {
    "coding": [
      {
        "system": "http://loinc.org",
        "code": "2132-9",
        "display": "Cobalamin (Vitamin B12) [Mass/volume] in Serum or Plasma"
      }
    ],
    "text": "Cobalamin (Vitamin B12) [Mass/volume] in Serum or Plasma"
  },
  "subject": {
    "reference": "Patient/80bdf638-377b-4bea-bbc2-0b337699e6a4"
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  "encounter": {
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  "effectiveDateTime": "2020-03-01T19:39:45+00:00",
  "issued": "2020-03-01T19:39:45.361+00:00",
  "valueQuantity": {
    "value": 684.23,
    "unit": "pg/mL",
    "system": "http://unitsofmeasure.org",
    "code": "pg/mL"
  }
}