---
type: "codesystem"
title: "messageheader-response-request"
codesystem: "messageheader-response-request"
---
# messageheader-response-request

- **Official URL**: http://hl7.org/fhir/messageheader-response-request
- **Version**: 6.0.0
- **Status**: active
- **Name**: MessageheaderResponseRequest
- **Title**: messageheader-response-request
- **Publisher**: HL7 (FHIR Project)
- **Description**: HL7-defined table of codes which identify conditions under which acknowledgments are required to be returned in response to a message.
- **Case Sensitive**: true
- **Content**: complete

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| always | Always | initiator expects a response for this message. |
| on-error | Error/reject conditions only | initiator expects a response only if in error. |
| never | Never | initiator does not expect a response. |
| on-success | Successful completion only | initiator expects a response only if successful. |

## CodeSystem XML



```xml
<?xml version="1.0" encoding="UTF-8"?>

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="messageheader-response-request"/>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="inm"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="normative"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="1"/>
  </extension>
  <url value="http://hl7.org/fhir/messageheader-response-request"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.925"/>
  </identifier>
  <identifier>
    <use value="old"/>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.1.844"/>
  </identifier>
  <version value="6.0.0"/>
  <name value="MessageheaderResponseRequest"/>
  <title value="messageheader-response-request"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2021-01-05T10:01:24+11:00"/>
  <publisher value="HL7 (FHIR Project)"/>
  <contact>
    <telecom>
      <system value="url"/>
      <value value="http://hl7.org/fhir"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="fhir@lists.hl7.org"/>
    </telecom>
  </contact>
  <description value="HL7-defined table of codes which identify conditions under which acknowledgments are required to be returned in response to a message."/>
  <caseSensitive value="true"/>
  <valueSet value="http://hl7.org/fhir/ValueSet/messageheader-response-request"/>
  <content value="complete"/>
  <concept>
    <code value="always"/>
    <display value="Always"/>
    <definition value="initiator expects a response for this message."/>
  </concept>
  <concept>
    <code value="on-error"/>
    <display value="Error/reject conditions only"/>
    <definition value="initiator expects a response only if in error."/>
  </concept>
  <concept>
    <code value="never"/>
    <display value="Never"/>
    <definition value="initiator does not expect a response."/>
  </concept>
  <concept>
    <code value="on-success"/>
    <display value="Successful completion only"/>
    <definition value="initiator expects a response only if successful."/>
  </concept>
</CodeSystem>
```