{
  "resourceType": "CodeSystem",
  "url": "http://hl7.org/fhir/ips/CodeSystem/absent-unknown",
  "name": "IPSCodeSystemAbsentUnknown",
  "title": "IPS CodeSystem - Absent and Unknown Data",
  "status": "draft",
  "experimental": false,
  "description": "International Patient Summary (IPS) codes for \"known absent\" and \"not known\" data.",
  "caseSensitive": true,
  "valueSet": "http://hl7.org/fhir/ips/ValueSet/absent-unknown",
  "content": "complete",
  "concept": [
    {
      "code": "allergic-disposition-not-known",
      "display": "Allergic disposition not known",
      "definition": "There is no information available regarding the subject's allergy conditions."
    },
    {
      "code": "no-known-allergy",
      "display": "No known allergy",
      "definition": "The subject has no known allergy conditions.",
      "concept": [
        {
          "code": "no-known-medication-allergy",
          "display": "No known medication allergy",
          "definition": "The subject has no known medication allergy conditions."
        },
        {
          "code": "no-known-environmental-allergy",
          "display": "No known environmental allergy",
          "definition": "The subject has no known environmental allergy conditions."
        },
        {
          "code": "no-known-food-allergy",
          "display": "No known food allergy",
          "definition": "The subject has no known food allergy conditions."
        }
      ]
    },
    {
      "code": "no-device-info",
      "display": "No information about devices",
      "definition": "There is no information available regarding implanted or external devices for the subject."
    },
    {
      "code": "no-known-device",
      "display": "No known devices in use",
      "definition": "There are no devices known to be implanted in or used by the subject."
    },
    {
      "code": "no-immunization-info",
      "display": "No information about immunizations",
      "definition": "The history of previous immunizations is not known."
    },
    {
      "code": "no-previous-immunizations",
      "display": "No previous immunizations",
      "definition": "There is no history of previous immunizations."
    },
    {
      "code": "no-medication-info",
      "display": "No information about current medications",
      "definition": "There is no information available about the subject's current medication use or administration."
    },
    {
      "code": "no-current-medications",
      "display": "No current medications",
      "definition": "The subject is not taking or being administered any current medications."
    },
    {
      "code": "no-problem-info",
      "display": "No information about current problems",
      "definition": "There is no information available about the subject's current health problems or disability."
    },
    {
      "code": "no-current-problems",
      "display": "No current problems",
      "definition": "The subject is not known to have any current health problems or disability."
    },
    {
      "code": "no-procedure-info",
      "display": "No information about past history of procedures",
      "definition": "There is no information available about the subject's past history of procedures."
    },
    {
      "code": "no-history-procedures",
      "display": "No history of procedures",
      "definition": "The subject has no history of previous procedures."
    }
  ]
}