---
type: "codesystem"
title: "Characteristic Offset"
codesystem: "characteristic-offset"
---
# Characteristic Offset

- **Official URL**: http://hl7.org/fhir/characteristic-offset
- **Version**: 6.0.0
- **Status**: active
- **Name**: CharacteristicOffset
- **Title**: Characteristic Offset
- **Publisher**: HL7 (FHIR Project)
- **Description**: Reference point for characteristic.valueQuantity.
- **Case Sensitive**: true
- **Content**: complete

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| UNL | Upper Normal Limit | The upper bound of the reference range. |
| LNL | Lower Normal Limit | The lower bound of the reference range. |

## CodeSystem XML



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

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="characteristic-offset"/>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="fhir"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="informative"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="1"/>
  </extension>
  <url value="http://hl7.org/fhir/characteristic-offset"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.1954"/>
  </identifier>
  <version value="6.0.0"/>
  <name value="CharacteristicOffset"/>
  <title value="Characteristic Offset"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2022-03-04T16:55:11+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="Reference point for characteristic.valueQuantity."/>
  <caseSensitive value="true"/>
  <valueSet value="http://hl7.org/fhir/ValueSet/characteristic-offset"/>
  <content value="complete"/>
  <concept>
    <code value="UNL"/>
    <display value="Upper Normal Limit"/>
    <definition value="The upper bound of the reference range."/>
  </concept>
  <concept>
    <code value="LNL"/>
    <display value="Lower Normal Limit"/>
    <definition value="The lower bound of the reference range."/>
  </concept>
</CodeSystem>
```