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 Smoking Cessation (Refused)

Prevention "other" Observation for Avery Linwood carrying the prevention-status extension (refused) at the April 8 2025 annual physical; native status derives to cancelled

Observation/prevention-smoking-avery-20250408 — claims conformance to Observation Profile

{
  "resourceType": "Observation",
  "id": "prevention-smoking-avery-20250408",
  "meta": {
    "profile": [
      "../StructureDefinition/nexus-emr-core-observation"
    ]
  },
  "extension": [
    {
      "url": "../StructureDefinition/nexus-emr-prevention-status-extension",
      "valueCode": "refused"
    }
  ],
  "identifier": [
    {
      "use": "secondary",
      "system": "../NamingSystem/cedarbrook-clinic-observation-raw-code",
      "value": "EMR-OBS-SMOKING-AVERY-20250408"
    }
  ],
  "status": "cancelled",
  "text": {
    "status": "generated",
    "div": "<div xmlns='http://www.w3.org/1999/xhtml'><p>Smoking cessation counselling offered to Avery Linwood at the April 8, 2025 annual physical; patient declined. Recorded as refused.</p></div>"
  },
  "category": [
    {
      "coding": [
        {
          "system": "http://terminology.hl7.org/CodeSystem/observation-category",
          "code": "social-history",
          "display": "Social History"
        }
      ]
    }
  ],
  "code": {
    "coding": [
      {
        "system": "../NamingSystem/nexus-emr-prevention-catalog",
        "code": "smoking",
        "display": "Smoking cessation and monitoring"
      }
    ],
    "text": "Smoking cessation and monitoring"
  },
  "subject": {
    "reference": "Patient/avery-linwood",
    "display": "Avery Linwood"
  },
  "encounter": {
    "reference": "Encounter/enc-avery-20250408-01rc",
    "display": "Annual Physical - Cedarbrook Site A"
  },
  "effectiveDateTime": "2025-04-08T09:20:00-06:00",
  "performer": [
    {
      "reference": "Practitioner/dr-emil-navarro",
      "display": "Dr. Emil Navarro"
    }
  ],
  "note": [
    {
      "text": "Patient declined the cessation program this visit; revisit at next periodic health visit. Refusal is a decided/concluded state carried by the prevention-status extension (refused); native Observation.status derives to cancelled (best-effort). No not-yet-happened event is recorded (2026-07-28 governance ruling)."
    }
  ]
}