# Preferred Specimen/Attribute Status (2.8.1 - 1.0.0) - HL7 v2.8.1 Vocabulary v0.2.0

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Preferred Specimen/Attribute Status (2.8.1 - 1.0.0)**

## CodeSystem: Preferred Specimen/Attribute Status (2.8.1 - 1.0.0) (Experimental) 

| | |
| :--- | :--- |
| *Official URL*:http://terminology.hl7.org/v2plusvocab/CodeSystem/preferredSpecimen-AttributeStatus | *Version*:1.0.0 |
| Active as of 2026-03-13 | *Computable Name*:PreferredSpecimen-AttributeStatus |
| *Other Identifiers:*OID:2.16.840.1.113883.18.426, urn:ietf:rfc:3986#Uniform Resource Identifier (URI)#http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0920 | |
| **Copyright/Legal**: HL7 Inc., 2026 | |

 
HL7-defined code system of concepts that indicate whether a Specimen/Attribute is Preferred or Alternate for collection of a particular specimen. Used in HL7 Version 2.x messaging in Master Files (OM4 segment) to characterize information about specimens that are associated with certain observations. 

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

* [Hl7VSpreferredSpecimen-AttributeStatus](ValueSet-hl7VSpreferredSpecimen-AttributeStatus.md)



## Resource Content

```json
{
  "resourceType" : "CodeSystem",
  "id" : "preferredSpecimen-AttributeStatus",
  "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" : "0920"
  }],
  "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/preferredSpecimen-AttributeStatus",
  "identifier" : [{
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.18.426"
  },
  {
    "system" : "urn:ietf:rfc:3986",
    "value" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0920"
  }],
  "version" : "1.0.0",
  "name" : "PreferredSpecimen-AttributeStatus",
  "title" : "Preferred Specimen/Attribute Status (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 indicate whether a Specimen/Attribute is Preferred or Alternate for collection of a particular specimen.  Used in HL7 Version 2.x messaging in Master Files (OM4 segment) to characterize information about specimens that are associated with certain observations.",
  "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" : "A",
    "display" : "Alternate",
    "definition" : "Alternate",
    "property" : [{
      "code" : "usage",
      "valueString" : "This is a specimen that is acceptable as a replacement for a preferred specimen.  In the following field (OM4-17), the sequence number of the preferred specimen must be messaged."
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.8"
    }]
  },
  {
    "code" : "P",
    "display" : "Preferred",
    "definition" : "Preferred",
    "property" : [{
      "code" : "usage",
      "valueString" : "This specimen is Preferred for all attributes (Container and Additive) identified in the OM4 segment."
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.8"
    }]
  }]
}

```
