http://terminology.hl7.org/CodeSystem/reaction-event-certainty|4.0.1

{
  "description" : "Statement about the degree of clinical certainty that a specific substance was the cause of the manifestation in a reaction event.",
  "compose" : null,
  "package" : "hl7.fhir.r4.examples@4.0.1",
  "date" : "2019-10-31T22:29:23Z",
  "meta" : {
    "lastUpdated" : "2019-11-01T09:29:23.356+11:00"
  },
  "publisher" : "HL7 (FHIR Project)",
  "content" : "complete",
  "name" : "AllergyIntoleranceCertainty",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "AllergyIntoleranceCertainty",
  "supliment" : null,
  "status" : "draft",
  "id" : "ddb2f38a-b5df-59a8-b696-e94e881ecdcf",
  "valueSet" : "http://hl7.org/fhir/ValueSet/reaction-event-certainty",
  "url" : "http://terminology.hl7.org/CodeSystem/reaction-event-certainty",
  "identifier" : [ {
    "value" : "urn:oid:2.16.840.1.113883.4.642.4.1276",
    "system" : "urn:ietf:rfc:3986"
  } ],
  "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."
  } ],
  "caseSensitive" : true,
  "version" : "4.0.1",
  "contact" : [ {
    "telecom" : [ {
      "value" : "http://hl7.org/fhir",
      "system" : "url"
    }, {
      "value" : "fhir@lists.hl7.org",
      "system" : "email"
    } ]
  } ]
}