<?xml version="1.0" encoding="UTF-8"?><CodeSystem xmlns="http://hl7.org/fhir"><id value="observation-status-reason"/><meta><lastUpdated value="2026-06-18T17:21:39.406+00:00"/></meta><text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem observation-status-reason</b></p><a name="observation-status-reason"> </a><a name="hcobservation-status-reason"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/CodeSystem/observation-status-reason</code> defines the following codes:</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">patient-mismatch<a name="observation-status-reason-patient-mismatch"> </a></td><td>Patient Mismatch</td><td>The patient identity or subject context did not match the expected patient or subject.</td></tr><tr><td style="white-space:nowrap">sample-mismatch<a name="observation-status-reason-sample-mismatch"> </a></td><td>Sample Mismatch</td><td>The specimen, sample, or referenced result did not match the expected subject, order, container, or report.</td></tr><tr><td style="white-space:nowrap">invalid-calibration<a name="observation-status-reason-invalid-calibration"> </a></td><td>Invalid Calibration</td><td>The device, instrument, or analyzer calibration used for referenced results was invalid, expired, or otherwise unreliable.</td></tr><tr><td style="white-space:nowrap">reagent-issue<a name="observation-status-reason-reagent-issue"> </a></td><td>Reagent issue</td><td>An incorrect, invalid, expired, recalled, or otherwise unsuitable reagent or reagent lot was used or identified for referenced results.</td></tr><tr><td style="white-space:nowrap">duplicate<a name="observation-status-reason-duplicate"> </a></td><td>Duplicate</td><td>The observation duplicates another observation.</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="1"/></extension><url value="http://hl7.org/fhir/CodeSystem/observation-status-reason"/><version value="6.0.0-ballot4"/><name value="ObservationStatusReasonCodes"/><title value="Observation Status Reason Codes"/><status value="active"/><experimental value="true"/><publisher value="HL7 International - Orders and Observations"/><contact><telecom><system value="url"/><value value="http://www.hl7.org/Special/committees/orders/index.cfm"/></telecom></contact><description value="Codes indicating why an observation is in its current status."/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><copyright value="Copyright HL7. Licensed under creative commons public domain"/><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/observation-status-reason"/><content value="complete"/><concept><code value="patient-mismatch"/><display value="Patient Mismatch"/><definition value="The patient identity or subject context did not match the expected patient or subject."/></concept><concept><code value="sample-mismatch"/><display value="Sample Mismatch"/><definition value="The specimen, sample, or referenced result did not match the expected subject, order, container, or report."/></concept><concept><code value="invalid-calibration"/><display value="Invalid Calibration"/><definition value="The device, instrument, or analyzer calibration used for referenced results was invalid, expired, or otherwise unreliable."/></concept><concept><code value="reagent-issue"/><display value="Reagent issue"/><definition value="An incorrect, invalid, expired, recalled, or otherwise unsuitable reagent or reagent lot was used or identified for referenced results."/></concept><concept><code value="duplicate"/><display value="Duplicate"/><definition value="The observation duplicates another observation."/></concept></CodeSystem>