{
  "resourceType": "StructureDefinition",
  "id": "MedicationStatementPSAB",
  "url": "https://www.alberta.ca/fhir/psab/StructureDefinition/MedicationStatementPSAB",
  "name": "MedicationStatementPSAB",
  "title": "MedicationStatement (PS-AB)",
  "status": "draft",
  "description": "This profile defines a set of constraints to the FHIR MedicationStatement resource for use in Alberta Patient Summaries (PS-AB). It re-profiles the PS-CA MedicationStatement profile and refines constraints that represent the minimum expectations for the MedicationStatement resource when used in the PS-AB Composition profile.",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "MedicationStatement",
  "baseDefinition": "http://fhir.infoway-inforoute.ca/io/psca/StructureDefinition/medicationstatement-ca-ps",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "MedicationStatement",
        "path": "MedicationStatement",
        "comment": "MedicationStatement resources included in Alberta Patient Summary Document Bundles SHALL NOT contain any of the following MedicationStatement details: statusReason,  context, dateAsserted, informationSource, derivedFrom, reasonReference, dosage.site, dosage.method, dosage.doseAndRate.type,dosage. doseAndRate.rate[x], dosage.maxDosePerPeriod, dosage.maxDosePerAdministration, dosage.maxDosePerLifetime. These rules are mechanically enforced through invariants at the PS-AB Bundle level."
      },
      {
        "id": "MedicationStatement.status",
        "path": "MedicationStatement.status",
        "patternCode": "unknown"
      },
      {
        "id": "MedicationStatement.medication[x]:medicationReference",
        "path": "MedicationStatement.medication[x]",
        "sliceName": "medicationReference",
        "sliceIsConstraining": true,
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "https://www.alberta.ca/fhir/psab/StructureDefinition/MedicationPSAB"
            ]
          }
        ]
      },
      {
        "id": "MedicationStatement.medication[x]:medicationCodeableConcept",
        "path": "MedicationStatement.medication[x]",
        "sliceName": "medicationCodeableConcept",
        "sliceIsConstraining": true,
        "comment": "Supply of medicationReference is preferred over medicationCodeableConcept, however both are allowed in the context of Alberta Patient Summaries",
        "type": [
          {
            "code": "CodeableConcept",
            "profile": [
              "http://fhir.infoway-inforoute.ca/io/psca/StructureDefinition/CodeableConcept-ca-ps"
            ]
          }
        ]
      },
      {
        "id": "MedicationStatement.subject",
        "path": "MedicationStatement.subject",
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "https://www.alberta.ca/fhir/psab/StructureDefinition/PatientPSAB"
            ]
          }
        ]
      },
      {
        "id": "MedicationStatement.effective[x]",
        "path": "MedicationStatement.effective[x]",
        "slicing": {
          "discriminator": [
            {
              "type": "type",
              "path": "$this"
            }
          ],
          "ordered": false,
          "rules": "open"
        }
      },
      {
        "id": "MedicationStatement.effective[x]:effectiveDateTime",
        "path": "MedicationStatement.effective[x]",
        "sliceName": "effectiveDateTime",
        "sliceIsConstraining": true,
        "comment": "YYYY-MM-DD format. Partial dates (YYYY only or YYYY-MM only) are accepted. Required for each submitted medication",
        "min": 0,
        "max": "1",
        "type": [
          {
            "code": "dateTime"
          }
        ],
        "mustSupport": true
      },
      {
        "id": "MedicationStatement.dosage.text",
        "path": "MedicationStatement.dosage.text",
        "comment": "since the dosage.doseAndrate does not accommodate any text, Amount of medication per dose could be recorded here"
      },
      {
        "id": "MedicationStatement.dosage.route.text",
        "path": "MedicationStatement.dosage.route.text",
        "comment": "Optional String: Max Character length (20) [May be full text name (e.g., by mouth) or abbreviation (e.g., PO); as well as non-standardized text] \n Include a 'recommended reference set' for common values, and allow other content as well? (i.e., not validated, but promoting/encouraging usage of standard values)"
      },
      {
        "id": "MedicationStatement.dosage.doseAndRate",
        "path": "MedicationStatement.dosage.doseAndRate",
        "comment": "If the dose is intended to change over time, depending on local rules/regulations, each change should be captured as a new version of the MedicationRequest with an updated dose, or captured with a new MedicationRequest with the new dose."
      }
    ]
  }
}