http://terminology.hl7.org/CodeSystem/v2-0919|2.9

{
  "description" : "FHIR Value set/code system definition for HL7 v2 table 0919 ( Exclusive Test)",
  "compose" : null,
  "package" : "hl7.fhir.r4.examples@4.0.1",
  "date" : null,
  "meta" : {
    "profile" : [ "http://hl7.org/fhir/StructureDefinition/shareablecodesystem" ]
  },
  "publisher" : "HL7, Inc",
  "content" : "complete",
  "name" : "v2.0919",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "v2 Exclusive Test",
  "supliment" : null,
  "extension" : [ {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode" : "external"
  }, {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 0
  } ],
  "status" : "active",
  "language" : "en",
  "id" : "df893ce2-64d0-53e4-a6a9-3ec73fee06b8",
  "url" : "http://terminology.hl7.org/CodeSystem/v2-0919",
  "identifier" : [ {
    "value" : "urn:oid:2.16.840.1.113883.18.425",
    "system" : "urn:ietf:rfc:3986"
  } ],
  "concept" : [ {
    "code" : "D",
    "display" : "In some cases, this test should be only exclusively with like tests (examples are cyto or pathology)",
    "extension" : [ {
      "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
      "valueString" : "When  D is specified for this field, using field OM1-49 determines how tests must be grouped together.  Tests within the same Diagnostic Service Sector may be on the same requisition, and therefore in the same message"
    } ]
  }, {
    "code" : "N",
    "display" : "This test can be included with any number of other tests",
    "extension" : [ {
      "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
      "valueString" : "Default -.will be assumed when this field is empty"
    } ]
  }, {
    "code" : "Y",
    "display" : "This test should be exclusive"
  } ],
  "version" : "2.9",
  "contact" : [ {
    "telecom" : [ {
      "value" : "http://hl7.org",
      "system" : "url"
    } ]
  } ]
}