---
type: "codesystem"
title: "Observation Range Category"
codesystem: "observation-range-category"
---
# Observation Range Category

- **Official URL**: http://hl7.org/fhir/observation-range-category
- **Version**: 6.0.0
- **Status**: active
- **Name**: ObservationRangeCategory
- **Title**: Observation Range Category
- **Publisher**: HL7 (FHIR Project)
- **Description**: Codes identifying the category of observation range.
- **Case Sensitive**: true
- **Content**: complete

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| reference | reference range | Reference (Normal) Range for Ordinal and Continuous Observations. |
| critical | critical range | Critical Range for Ordinal and Continuous Observations. Results outside this range are critical. |
| absolute | absolute range | Absolute Range for Ordinal and Continuous Observations. Results outside this range are not possible. |

## CodeSystem XML



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

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="observation-range-category"/>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="oo"/>
  </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/observation-range-category"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.1334"/>
  </identifier>
  <version value="6.0.0"/>
  <name value="ObservationRangeCategory"/>
  <title value="Observation Range Category"/>
  <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="Codes identifying the category of observation range."/>
  <caseSensitive value="true"/>
  <valueSet value="http://hl7.org/fhir/ValueSet/observation-range-category"/>
  <content value="complete"/>
  <concept>
    <code value="reference"/>
    <display value="reference range"/>
    <definition value="Reference (Normal) Range for Ordinal and Continuous Observations."/>
  </concept>
  <concept>
    <code value="critical"/>
    <display value="critical range"/>
    <definition value="Critical Range for Ordinal and Continuous Observations. Results outside this range are critical."/>
  </concept>
  <concept>
    <code value="absolute"/>
    <display value="absolute range"/>
    <definition value="Absolute Range for Ordinal and Continuous Observations. Results outside this range are not possible."/>
  </concept>
</CodeSystem>
```