MedicationRequest Profile

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

Defines the Nexus EMR FHIR profile for MedicationRequest resources, based on CA-Core constraints, for aggregating prescription data from multiple EMRs.

Examples

Detailed · Naproxen 500mg BID (proposed) · Warfarin 5mg Daily (existing)

Warfarin 5mg Daily (existing)

The EXISTING half of the warfarin/NSAID interaction pair -- the prescription already in force when the naproxen order was entered

MedicationRequest/rx-avery-warfarin — claims conformance to MedicationRequest Profile

{
  "resourceType": "MedicationRequest",
  "id": "rx-avery-warfarin",
  "meta": {
    "profile": [
      "../StructureDefinition/nexus-emr-core-medicationrequest"
    ]
  },
  "extension": [
    {
      "url": "../StructureDefinition/nexus-emr-medication-strength",
      "extension": [
        {
          "url": "strengthText",
          "valueString": "5mg"
        },
        {
          "url": "strengthQuantity",
          "extension": [
            {
              "url": "numerator",
              "valueQuantity": {
                "value": 5,
                "unit": "mg",
                "system": "http://unitsofmeasure.org",
                "code": "mg"
              }
            },
            {
              "url": "denominator",
              "valueQuantity": {
                "value": 1,
                "unit": "tablet",
                "system": "http://unitsofmeasure.org",
                "code": "1"
              }
            }
          ]
        }
      ]
    }
  ],
  "text": {
    "status": "generated",
    "div": "<div xmlns="http://www.w3.org/1999/xhtml"><p>Warfarin 5 mg daily for Avery Linwood, on the active medication list since January 2025 and monitored by regular INR. The EXISTING half of the warfarin/NSAID interaction pair: this is the prescription already in force when a naproxen order was entered on 8 April 2025.</p></div>"
  },
  "status": "active",
  "intent": "order",
  "medicationCodeableConcept": {
    "text": "Warfarin sodium 5mg",
    "coding": [
      {
        "system": "http://www.whocc.no/atc",
        "code": "B01AA03",
        "display": "warfarin"
      }
    ]
  },
  "subject": {
    "reference": "Patient/avery-linwood",
    "display": "Avery Linwood"
  },
  "authoredOn": "2025-01-08",
  "requester": {
    "reference": "PractitionerRole/dr-navarro-familymed-role",
    "display": "Dr. Emil Navarro"
  },
  "dosageInstruction": [
    {
      "text": "Take one 5 mg tablet by mouth once daily, at the same time each evening.",
      "route": {
        "text": "Oral route",
        "coding": [
          {
            "system": "http://snomed.info/sct",
            "code": "26643006",
            "display": "Oral route"
          }
        ]
      },
      "timing": {
        "repeat": {
          "boundsPeriod": {
            "start": "2025-01-08"
          }
        }
      },
      "doseAndRate": [
        {
          "doseQuantity": {
            "value": 1,
            "unit": "tablet"
          }
        }
      ]
    }
  ]
}

Referenced by: Warfarin/NSAID Interaction with Prescriber Override