{
    "resourceType": "Observation",
    "id": "c37408e8-f6f8-4398-8af7-b89356e1d06d",
    "meta": {
        "versionId": "1",
        "lastUpdated": "03/12/2021 11:50:05",
        "source": "#8VEGmpEIGaRPRFEr"
    },
    "status": "final",
    "category":  [
        {
            "coding":  [
                {
                    "system": "http://terminology.hl7.org/CodeSystem/observation-category",
                    "code": "laboratory",
                    "display": "laboratory"
                }
            ]
        }
    ],
    "code": {
        "coding":  [
            {
                "system": "http://loinc.org",
                "code": "17842-6",
                "display": "Cancer Ag 27-29 [Units/volume] in Serum or Plasma"
            }
        ],
        "text": "Cancer Ag 27-29 [Units/volume] in Serum or Plasma"
    },
    "subject": {
        "reference": "Patient/b4c4db46-a7ac-4e55-adcc-578ba31d9ad2"
    },
    "encounter": {
        "reference": "Encounter/128cf086-587a-406f-a375-dae6f298e832"
    },
    "effectiveDateTime": "06/26/1945 15:39:30",
    "issued": "06/26/1945 15:39:30",
    "valueQuantity": {
        "value": 11.825,
        "unit": "[arb'U]/mL",
        "system": "http://unitsofmeasure.org",
        "code": "[arb'U]/mL"
    }
}