Observation Profile

Canonical	../StructureDefinition/nexus-emr-core-observation
Status	draft · 1.26.0
Base	Observation (constraint)
Source	FSH · JSON

Nexus EMR profile for the Observation resource, based on CA-Core. Represents measurements, tests, and simple assertions originating from source EMRs for aggregation.

Examples

Avery Diastolic Blood Pressure · Avery Height · Avery LDL Cholesterol · Avery PAP Screening (Completed Externally) · Avery Smoking Cessation (Refused) · Avery Systolic Blood Pressure · Hemoglobin Lab Result

Avery LDL Cholesterol

Calculated LDL above the diabetes treatment target, carrying an interpretation and a reference range. The single laboratory input the Framingham risk assessment cites as its basis

Observation/ldl-avery-20260408 — claims conformance to Observation Profile

{
  "resourceType": "Observation",
  "id": "ldl-avery-20260408",
  "meta": {
    "profile": [
      "../StructureDefinition/nexus-emr-core-observation"
    ]
  },
  "text": {
    "status": "generated",
    "div": "<div xmlns="http://www.w3.org/1999/xhtml"><p>Calculated LDL cholesterol of 3.4 mmol/L for Avery Linwood, drawn on the morning of 8 April 2026. Above the treatment target for a patient with diabetes, and the single laboratory input the Framingham cardiovascular risk assessment recorded later that day cites as its basis.</p></div>"
  },
  "status": "final",
  "category": [
    {
      "coding": [
        {
          "system": "http://terminology.hl7.org/CodeSystem/observation-category",
          "code": "laboratory",
          "display": "Laboratory"
        }
      ]
    }
  ],
  "code": {
    "coding": [
      {
        "system": "http://loinc.org",
        "code": "39469-2",
        "display": "Cholesterol in LDL [Moles/volume] in Serum or Plasma by calculation"
      }
    ],
    "text": "LDL cholesterol (calculated)"
  },
  "subject": {
    "reference": "Patient/nexus-emr-patient-attachment-example",
    "display": "Avery Linwood"
  },
  "effectiveDateTime": "2026-04-08T08:15:00-04:00",
  "valueQuantity": {
    "value": 3.4,
    "unit": "mmol/L",
    "system": "http://unitsofmeasure.org",
    "code": "mmol/L"
  },
  "interpretation": [
    {
      "coding": [
        {
          "system": "http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation",
          "code": "H",
          "display": "High"
        }
      ]
    }
  ],
  "referenceRange": [
    {
      "high": {
        "value": 2,
        "unit": "mmol/L",
        "system": "http://unitsofmeasure.org",
        "code": "mmol/L"
      },
      "text": "Treatment target below 2.0 mmol/L for patients with diabetes"
    }
  ]
}

Referenced by: nexus-emr-clinical-task-correction-request-denied · nexus-emr-riskassessment-example · nexus-statement-of-disagreement-ldl-non-fasting