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Source1

{
  "resourceType": "CodeSystem",
  "id": "codesystem-v2-message-type",
  "url": "http://ontariohealth.ca/fhir/CodeSystem/cdf-v2-message-type",
  "version": "1.0.0",
  "name": "V2MessageTypeEHR",
  "title": "V2 Message Type EHR",
  "status": "active",
  "experimental": false,
  "date": "2026-01-29",
  "publisher": "Ontario Health",
  "contact": [
    {
      "name": "Ontario Health - Digital Health Standards",
      "telecom": [
        {
          "system": "url",
          "value": "https://ehealthontario.on.ca/en/it-professionals/standards"
        },
        {
          "system": "email",
          "value": "DigitalHealthStandards@ontariohealth.ca"
        }
      ]
    }
  ],
  "description": "Ontario Health codes for HL7 v2 message type.",
  "content": "complete",
  "concept": [
    {
      "code": "ADT^A01",
      "display": "Activate Inpatient Visit"
    },
    {
      "code": "ADT^A02",
      "display": "Transfer a Patient"
    },
    {
      "code": "ADT^A03",
      "display": "Discharge/End Visit"
    },
    {
      "code": "ADT^A04",
      "display": "Activate Outpatient or Emergency Visit"
    },
    {
      "code": "ADT^A05",
      "display": "Pre-Admit"
    },
    {
      "code": "ADT^A06",
      "display": "Convert OP to IP"
    },
    {
      "code": "ADT^A07",
      "display": "Convert IP to OP"
    },
    {
      "code": "ADT^A08",
      "display": "Update Visit Information"
    },
    {
      "code": "ADT^A10",
      "display": "Patient Arrives"
    },
    {
      "code": "ADT^A11",
      "display": "Cancel Admit"
    },
    {
      "code": "ADT^A13",
      "display": "Cancel Discharge"
    },
    {
      "code": "ADT^A17",
      "display": "Swap Patients"
    },
    {
      "code": "ADT^A28",
      "display": "Add Person Information"
    },
    {
      "code": "ADT^A42",
      "display": "Merge Visit Information"
    },
    {
      "code": "ADT^A45",
      "display": "Move Visit Information"
    },
    {
      "code": "ADT^A60",
      "display": "Update Allergy Information"
    },
    {
      "code": "ORM^O01",
      "display": "Order Messsage"
    },
    {
      "code": "ORU^R01",
      "display": "Unsolicited Document or Result"
    },
    {
      "code": "RAS^O17",
      "display": "Medication Administration"
    }
  ]
}