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Source1

{
  "resourceType": "CodeSystem",
  "id": "reaction-event-certainty",
  "meta": {
    "lastUpdated": "2023-01-31T07:07:38.434+11:00",
    "profile": [
      "http://hl7.org/fhir/StructureDefinition/shareablecodesystem"
    ]
  },
  "text": {
    "status": "generated",
    "div": "<!-- snip (see above) -->"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "pc"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
      "valueCode": "trial-use"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger": 2
    }
  ],
  "url": "http://hl7.org/fhir/reaction-event-certainty",
  "identifier": [
    {
      "system": "urn:ietf:rfc:3986",
      "value": "urn:oid:2.16.840.1.113883.4.642.1.1276"
    },
    {
      "use": "old",
      "system": "urn:ietf:rfc:3986",
      "value": "urn:oid:2.16.840.1.113883.4.642.1.860"
    },
    {
      "use": "old",
      "system": "urn:ietf:rfc:3986",
      "value": "urn:oid:2.16.840.1.113883.4.642.2.54"
    }
  ],
  "version": "5.3.0-ballot-tc1",
  "name": "AllergyIntoleranceCertainty",
  "title": "AllergyIntolerance Certainty CodeSystem",
  "status": "active",
  "experimental": false,
  "date": "2026-01-28T01:21:01+00:00",
  "publisher": "HL7 International / Patient Care",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/patientcare"
        }
      ]
    }
  ],
  "description": "AllergyIntoleranceCertainty",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code": "001"
        }
      ]
    }
  ],
  "caseSensitive": true,
  "content": "complete",
  "concept": [
    {
      "code": "unlikely",
      "display": "Unlikely",
      "definition": "There is a low level of clinical certainty that the reaction was caused by the identified substance."
    },
    {
      "code": "likely",
      "display": "Likely",
      "definition": "There is a high level of clinical certainty that the reaction was caused by the identified substance."
    },
    {
      "code": "confirmed",
      "display": "Confirmed",
      "definition": "There is a very high level of clinical certainty that the reaction was due to the identified substance, which may include clinical evidence by testing or rechallenge."
    },
    {
      "code": "unknown",
      "display": "Unknown",
      "definition": "The clinical certainty that the reaction was caused by the identified substance is unknown.  It is an explicit assertion that certainty is not known."
    }
  ]
}