http://terminology.hl7.org/CodeSystem/data-absent-reason|1.0.0

{
  "description" : "Used to specify why the normally expected content of the data element is missing.",
  "compose" : null,
  "package" : "hl7.terminology.r5@6.3.0",
  "date" : "2019-10-31T22:29:23Z",
  "meta" : {
    "lastUpdated" : "2019-11-01T09:29:23.356+11:00"
  },
  "publisher" : "Health Level Seven International",
  "content" : "complete",
  "name" : "DataAbsentReason",
  "copyright" : "This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license.html",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "DataAbsentReason",
  "supliment" : null,
  "extension" : [ {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "oo"
  }, {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version",
    "valueCode" : "4.0.0"
  }, {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 5
  } ],
  "status" : "active",
  "id" : "e31b7fb5-d44d-5c39-8b37-235f22c26009",
  "valueSet" : "http://hl7.org/fhir/ValueSet/data-absent-reason",
  "url" : "http://terminology.hl7.org/CodeSystem/data-absent-reason",
  "identifier" : [ {
    "value" : "urn:oid:2.16.840.1.113883.4.642.4.1048",
    "system" : "urn:ietf:rfc:3986"
  } ],
  "concept" : [ {
    "code" : "unknown",
    "concept" : [ {
      "code" : "asked-unknown",
      "display" : "Asked But Unknown",
      "definition" : "The source was asked but does not know the value."
    }, {
      "code" : "temp-unknown",
      "display" : "Temporarily Unknown",
      "definition" : "There is reason to expect (from the workflow) that the value may become known."
    }, {
      "code" : "not-asked",
      "display" : "Not Asked",
      "definition" : "The workflow didn't lead to this value being known."
    }, {
      "code" : "asked-declined",
      "display" : "Asked But Declined",
      "definition" : "The source was asked but declined to answer."
    } ],
    "display" : "Unknown",
    "definition" : "The value is expected to exist but is not known."
  }, {
    "code" : "masked",
    "display" : "Masked",
    "extension" : [ {
      "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
      "valueString" : "Using \"masked\" may be breach of security or confidentiality, but there are times        when its use is required to support alternate workflows for gaining access to denied information."
    } ],
    "definition" : "The information is not available due to security, privacy or related reasons."
  }, {
    "code" : "not-applicable",
    "display" : "Not Applicable",
    "definition" : "There is no proper value for this element (e.g. last menstrual period for a male)."
  }, {
    "code" : "unsupported",
    "display" : "Unsupported",
    "definition" : "The source system wasn't capable of supporting this element."
  }, {
    "code" : "as-text",
    "display" : "As Text",
    "extension" : [ {
      "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
      "valueString" : "It may be linked by internal references (e.g. xml:id). This usually implies that the value        could not be represented in the correct format - this may be due to system limitations,        or this particular data value."
    } ],
    "definition" : "The content of the data is represented in the resource narrative."
  }, {
    "code" : "error",
    "concept" : [ {
      "code" : "not-a-number",
      "display" : "Not a Number (NaN)",
      "extension" : [ {
        "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
        "valueString" : "This is sometimes an output value from measuring devices."
      } ],
      "definition" : "The numeric value is undefined or unrepresentable due to a floating point processing error."
    }, {
      "code" : "negative-infinity",
      "display" : "Negative Infinity (NINF)",
      "extension" : [ {
        "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
        "valueString" : "This is sometimes an output value from measuring devices."
      } ],
      "definition" : "The numeric value is excessively low and unrepresentable due to a floating point processing        error."
    }, {
      "code" : "positive-infinity",
      "display" : "Positive Infinity (PINF)",
      "extension" : [ {
        "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
        "valueString" : "This is sometimes an output value from measuring devices."
      } ],
      "definition" : "The numeric value is excessively high and unrepresentable due to a floating point processing        error."
    } ],
    "display" : "Error",
    "definition" : "Some system or workflow process error means that the information is not available."
  }, {
    "code" : "not-performed",
    "display" : "Not Performed",
    "definition" : "The value is not available because the observation procedure (test, etc.) was not performed."
  }, {
    "code" : "not-permitted",
    "display" : "Not Permitted",
    "extension" : [ {
      "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
      "valueString" : "This is most often associated with required bindings that do not include the actual code        used, but may be used with other data types."
    } ],
    "definition" : "The value is not permitted in this context (e.g. due to profiles, or the base data types)."
  } ],
  "caseSensitive" : true,
  "version" : "1.0.0",
  "contact" : [ {
    "telecom" : [ {
      "value" : "http://hl7.org",
      "system" : "url"
    }, {
      "value" : "hq@HL7.org",
      "system" : "email"
    } ]
  } ]
}