<?xml version="1.0" encoding="UTF-8"?><CodeSystem xmlns="http://hl7.org/fhir"><id value="observation-referencerange-normalvalue"/><meta><lastUpdated value="2026-04-01T05:19:13.451+11:00"/></meta><text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem observation-referencerange-normalvalue</b></p><a name="observation-referencerange-normalvalue"> </a><a name="hcobservation-referencerange-normalvalue"> </a><div style="display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%"><p style="margin-bottom: 0px">Last updated: 2021-01-05T10:01:24.148+11:00</p></div><p>This case-sensitive code system <code>http://hl7.org/fhir/observation-referencerange-normalvalue</code> defines the following codes in a Is-A hierarchy:</p><table class="codes"><tr><td style="white-space:nowrap"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style="white-space:nowrap">negative<a name="observation-referencerange-normalvalue-negative"> </a></td><td>Negative</td><td>The expected normal value for the observation is negative.</td></tr><tr><td style="white-space:nowrap">absent<a name="observation-referencerange-normalvalue-absent"> </a></td><td>Absent</td><td>The expected normal value for the observation is absent.</td></tr></table></div></text><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="informative"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm"><valueInteger value="5"/></extension><url value="http://hl7.org/fhir/observation-referencerange-normalvalue"/><identifier><system value="urn:ietf:rfc:3986"/><value value="urn:oid:2.16.840.1.113883.4.642.4.2099"/></identifier><version value="6.0.0-ballot4"/><name value="ObservationReferenceRangeNormalValue"/><title value="ObservationreferenceRangeNormalValue"/><status value="active"/><experimental value="false"/><date value="2022-04-05T10:01:24+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 that describe the normal value in the reference range."/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/observation-referencerange-normalvalue"/><hierarchyMeaning value="is-a"/><content value="complete"/><concept><code value="negative"/><display value="Negative"/><definition value="The expected normal value for the observation is negative."/></concept><concept><code value="absent"/><display value="Absent"/><definition value="The expected normal value for the observation is absent."/></concept></CodeSystem>