# Exclusive Test (2.8.1 - 1.0.0) - HL7 v2.8.1 Vocabulary v0.2.0

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Exclusive Test (2.8.1 - 1.0.0)**

## CodeSystem: Exclusive Test (2.8.1 - 1.0.0) (Experimental) 

| | |
| :--- | :--- |
| *Official URL*:http://terminology.hl7.org/v2plusvocab/CodeSystem/exclusiveTest | *Version*:1.0.0 |
| Active as of 2026-03-13 | *Computable Name*:ExclusiveTest |
| *Other Identifiers:*OID:2.16.840.1.113883.18.425, urn:ietf:rfc:3986#Uniform Resource Identifier (URI)#http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0919 | |
| **Copyright/Legal**: HL7 Inc., 2026 | |

 
HL7-defined code system of concepts that define if a test should be a specific event with no other tests to be performed with this test, or not, or other special circumstances. Used in HL7 Version 2.x messaging in Master Files (OM1 segment) to characterize observations in a master of such orderables. 

 This Code system is referenced in the content logical definition of the following value sets: 

* [Hl7VSexclusiveTest](ValueSet-hl7VSexclusiveTest.md)



## Resource Content

```json
{
  "resourceType" : "CodeSystem",
  "id" : "exclusiveTest",
  "extension" : [{
    "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated",
    "valueString" : "2.8.1"
  },
  {
    "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory",
    "valueString" : "generate correct history somehow"
  },
  {
    "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo",
    "valueString" : "0919"
  }],
  "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/exclusiveTest",
  "identifier" : [{
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.18.425"
  },
  {
    "system" : "urn:ietf:rfc:3986",
    "value" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0919"
  }],
  "version" : "1.0.0",
  "name" : "ExclusiveTest",
  "title" : "Exclusive Test (2.8.1 - 1.0.0)",
  "status" : "active",
  "experimental" : true,
  "date" : "2026-03-13T11:11:38+00:00",
  "publisher" : "HL7/FO",
  "contact" : [{
    "name" : "HL7/FO",
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org"
    }]
  }],
  "description" : "HL7-defined code system of concepts that define if a test should be a specific event with no other tests to be performed with this test, or not, or other special circumstances.  Used in HL7 Version 2.x messaging in Master Files (OM1 segment) to characterize observations in a master of such orderables.",
  "copyright" : "HL7 Inc., 2026",
  "caseSensitive" : true,
  "compositional" : false,
  "content" : "complete",
  "property" : [{
    "code" : "versionIntroduced",
    "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced",
    "description" : "version when was this code introduced",
    "type" : "string"
  },
  {
    "code" : "versionDeprecated",
    "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated",
    "description" : "version when was this code deprecated",
    "type" : "string"
  },
  {
    "code" : "status",
    "uri" : "http://hl7.org/fhir/concept-properties#status",
    "description" : "A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired",
    "type" : "code"
  },
  {
    "code" : "comment",
    "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment",
    "description" : "A string that provides additional detail pertinent to the use or understanding of the concept",
    "type" : "string"
  },
  {
    "code" : "usage",
    "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage",
    "description" : "usage notes for this code",
    "type" : "string"
  },
  {
    "code" : "modified",
    "uri" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified",
    "description" : "date of last modification",
    "type" : "dateTime"
  }],
  "concept" : [{
    "code" : "D",
    "display" : "In some cases, this test should be only exclusively with like tests (examples are cyto or pathology)",
    "definition" : "In some cases, this test should be only exclusively with like tests (examples are cyto or pathology)",
    "property" : [{
      "code" : "usage",
      "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" : "versionIntroduced",
      "valueString" : "2.8"
    }]
  },
  {
    "code" : "N",
    "display" : "This test can be included with any number of other tests",
    "definition" : "This test can be included with any number of other tests",
    "property" : [{
      "code" : "usage",
      "valueString" : "Default -.will be assumed when this field is empty"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.8"
    }]
  },
  {
    "code" : "Y",
    "display" : "This test should be exclusive",
    "definition" : "This test should be exclusive",
    "property" : [{
      "code" : "versionIntroduced",
      "valueString" : "2.8"
    }]
  }]
}

```
