Specimen Profile

Canonical	../StructureDefinition/nexus-emr-core-specimen
Status	draft (experimental) · 1.26.0
Base	Specimen (constraint)
Source	FSH · JSON

Nexus EMR profile for Specimen -- the physical sample a lab result was produced from. Currently a pass-through type: the platform resolves ServiceRequest.specimen references and traverses into Specimen from DiagnosticReport, but reads none of its own fields. First pass; the heritage-EMR reconciliation is unresolved.

Examples

Venous Blood Specimen (CBC)

Blood draw behind Avery Linwood's April 8 2025 CBC. Shows the accessionIdentifier contract -- the performing lab's number, deliberately distinct from the specimen's own identifier because an accession is lab-scoped and not unique across labs

Specimen/spec-avery-cbc-20250408 — claims conformance to Specimen Profile

{
  "resourceType": "Specimen",
  "id": "spec-avery-cbc-20250408",
  "meta": {
    "profile": [
      "../StructureDefinition/nexus-emr-core-specimen"
    ]
  },
  "text": {
    "status": "generated",
    "div": "<div xmlns='http://www.w3.org/1999/xhtml'><p>Venous blood draw for Avery Linwood's April 8 2025 CBC, collected in clinic and processed by Cedarbrook Reference Lab.</p><p>The field that earns this profile is <code>accessionIdentifier</code> -- the performing lab's own number. It is what correlates a result back to the physical sample, what reveals when several results came from one draw, and what a human reads off a requisition when phoning the lab. Note it is deliberately NOT merged with <code>identifier</code>: an accession is scoped to the performing lab and is not unique across labs.</p><p>This example is a natively-authored specimen. A heritage-EMR lab result would typically carry the accession and nothing else -- no status, a free-text specimen source at best, and no specimen identifier at all. See the profile's heritage-EMR notes; that reconciliation is unresolved.</p></div>"
  },
  "identifier": [
    {
      "use": "secondary",
      "system": "../NamingSystem/cedarbrook-clinic-specimen-raw-code",
      "value": "SPEC-88301"
    }
  ],
  "accessionIdentifier": {
    "system": "../NamingSystem/cedarbrook-reference-lab-accession",
    "value": "CRL-2025-0408-114927"
  },
  "status": "available",
  "type": {
    "coding": [
      {
        "system": "http://snomed.info/sct",
        "code": "119297000",
        "display": "Blood specimen"
      }
    ],
    "text": "Venous blood"
  },
  "subject": {
    "reference": "Patient/avery-linwood",
    "display": "Avery Linwood"
  },
  "receivedTime": "2025-04-08T11:49:00-06:00",
  "request": [
    {
      "reference": "ServiceRequest/lab-request-hemoglobin",
      "display": "CBC with differential"
    }
  ],
  "collection": {
    "collectedDateTime": "2025-04-08T09:35:00-06:00",
    "collector": {
      "reference": "Practitioner/adaeze-okonkwo-rn",
      "display": "Adaeze Okonkwo, RN"
    },
    "bodySite": {
      "text": "Left antecubital fossa"
    }
  }
}