# Reason for Study (2.9.1 - 1.0.0) - HL7 v2.9.1 Vocabulary v0.2.0

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Reason for Study (2.9.1 - 1.0.0)**

## CodeSystem: Reason for Study (2.9.1 - 1.0.0) (Experimental) 

| | |
| :--- | :--- |
| *Official URL*:http://terminology.hl7.org/v2plusvocab/CodeSystem/reasonForStudy | *Version*:1.0.0 |
| Active as of 2026-03-13 | *Computable Name*:ReasonForStudy |
| *Other Identifiers:*OID:2.16.840.1.113883.18.451, urn:ietf:rfc:3986#Uniform Resource Identifier (URI)#http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0951 | |
| **Copyright/Legal**: HL7 Inc., 2026 | |

 
HL7-defined code system of concepts that provide additional information to the universal service identifier on why a test, study or review was ordered. Initial values are to support the IHE LCC LAB-7 transaction. 

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

* [Hl7VSReasonForStudy](ValueSet-hl7VSReasonForStudy.md)



## Resource Content

```json
{
  "resourceType" : "CodeSystem",
  "id" : "reasonForStudy",
  "extension" : [{
    "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated",
    "valueString" : "2.9.1"
  },
  {
    "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory",
    "valueString" : "generate correct history somehow"
  },
  {
    "url" : "http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo",
    "valueString" : "0951"
  }],
  "url" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/reasonForStudy",
  "identifier" : [{
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.18.451"
  },
  {
    "system" : "urn:ietf:rfc:3986",
    "value" : "http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0951"
  }],
  "version" : "1.0.0",
  "name" : "ReasonForStudy",
  "title" : "Reason for Study (2.9.1 - 1.0.0)",
  "status" : "active",
  "experimental" : true,
  "date" : "2026-03-13T11:04:57+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 provide additional information to the universal service identifier on why a test, study or review was ordered. Initial values are to support the IHE LCC LAB-7 transaction.",
  "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" : [{
    "id" : "6775",
    "code" : "BS",
    "display" : "Bank residual specimen",
    "definition" : "Requests that the specimen should be stored long term",
    "property" : [{
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6776",
    "code" : "CR",
    "display" : "Confirm results value",
    "definition" : "Requests verification of previously reported results",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6777",
    "code" : "FP",
    "display" : "Store residual specimen pending follow up",
    "definition" : "Requests that the specimen should be saved for a short duration until follow up is completed",
    "property" : [{
      "code" : "comment",
      "valueString" : "Provides instructions for Specimen storage"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6778",
    "code" : "IN",
    "display" : "Interpret results",
    "definition" : "Requests interpretation of previously reported results",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6779",
    "code" : "IR",
    "display" : "Review clinically inconsistent results",
    "definition" : "Requests comparison of previously reported results amongst themselves",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6780",
    "code" : "IT",
    "display" : "Incorrect test performed",
    "definition" : "For process improvement work this code can be used to identify when an incorrect test was performed for the target order",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6781",
    "code" : "OP",
    "display" : "Test ordering problem",
    "definition" : "For process improvement work this code can be used to identify orders and the respective results, where problems occurred during ordering",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6782",
    "code" : "PI",
    "display" : "Patient identification problem",
    "definition" : "For process improvement work this code can be used to identify when a patient identification issue has occurred on the target order",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6783",
    "code" : "SI",
    "display" : "Suspected interference",
    "definition" : "Requests verification of previously reported results due to suspected interference",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6784",
    "code" : "SP",
    "display" : "Sampling problem",
    "definition" : "For process improvement work this code can be used to identify orders, where problems occurred during sample collection",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "status",
      "valueCode" : "retired"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6785",
    "code" : "TP",
    "display" : "Specimen transport problem",
    "definition" : "For process improvement work this code can be used to identify orders, where problems occurred during sample transport",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6786",
    "code" : "TT",
    "display" : "Turnaround time problem",
    "definition" : "For process improvement work this code can be used to identify results with excessive reporting delay",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  },
  {
    "id" : "6787",
    "code" : "XR",
    "display" : "Incorrect results",
    "definition" : "For process improvement work this code can be used to identify when incorrect result were reported for the target order",
    "property" : [{
      "code" : "usage",
      "valueString" : "Used to indicate why review is requested"
    },
    {
      "code" : "modified",
      "valueDateTime" : "2022-08-25"
    },
    {
      "code" : "versionIntroduced",
      "valueString" : "2.9"
    }]
  }]
}

```
