2026 US Quality Core Implementation Guide
0.5.0 - cibuild US

2026 US Quality Core Implementation Guide, published by Office of the National Coordinator for Health Information Technology (ONC). This guide is not an authorized publication; it is the continuous build for version 0.5.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/FHIR/us-quality-core/ and changes regularly. See the Directory of published versions

## : ObservationCancelled with value set example - XML Representation

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    <Observation xmlns="http://hl7.org/fhir">
      <id value="negation-example"/>
      <meta>
        <profile
                 value="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-observationcancelled"/>
      </meta>
      <text>
        <status value="extensions"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: Observation negation-example</b></p><a name="negation-example"> </a><a name="hcnegation-example"> </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"/><p style="margin-bottom: 0px">Profile: <a href="StructureDefinition-us-quality-core-observationcancelled.html">US Quality Core Observation Cancelled</a></p></div><p><b>US Quality Core Not Done Reason</b>: <span title="Codes:{http://snomed.info/sct 410536001}">Contraindicated (qualifier value)</span></p><p><b>status</b>: Cancelled</p><p><b>category</b>: <span title="Codes:{http://terminology.hl7.org/CodeSystem/observation-category laboratory}">Laboratory</span></p><p><b>code</b>: <span title="Codes:">Not Done Value Set: Hemoglobin lab test</span> (Not done value set: <a href="https://vsac.nlm.nih.gov/valueset/2.16.840.1.113762.1.4.1045.131/expansion">Hemoglobin lab test</a>)</p><p><b>subject</b>: <a href="Patient-example.html">Jim Chalmers  Male, DoB: 1974-12-25 ( Social Security number (use: usual, period: 2001-05-06 --&gt; (ongoing)))</a></p><p><b>encounter</b>: <a href="Encounter-example.html">Encounter: identifier = http://example.org/encounters#ENC-20130404-appendicitis; status = finished; class = inpatient encounter (v3 Code System ActCode#IMP); type = Initial hospital inpatient or observation care, per day, for the evaluation and management of a patient, which requires a medically appropriate history and/or examination and high level of medical decision making. When using total time on the date of the encounter for code selection, 75 minutes must be met or exceeded.; period = 2013-04-04 18:00:00-0400 --&gt; 2013-04-06 11:00:00-0400</a></p><p><b>effective</b>: 2013-04-02 10:30:10+0100 --&gt; 2013-04-05 10:30:10+0100</p><p><b>issued</b>: 2013-04-03 15:30:10+0100</p><p><b>performer</b>: <a href="Organization-example1.html">Hendricks Country Hospital</a></p><p><b>value</b>: <span title="Codes:"></span></p></div>
      </text>
      <extension
                 url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-notDoneReason">
        <valueCodeableConcept>
          <coding>
            <system value="http://snomed.info/sct"/>
            <code value="410536001"/>
            <display value="Contraindicated (qualifier value)"/>
          </coding>
        </valueCodeableConcept>
      </extension>
      <status value="cancelled"/>
      <category>
        <coding>
          <system
                  value="http://terminology.hl7.org/CodeSystem/observation-category"/>
          <code value="laboratory"/>
          <display value="Laboratory"/>
        </coding>
      </category>
      <code>
        <extension
                   url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-notDoneValueSet">
          <valueCanonical
                          value="http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1045.131"/>
        </extension>
        <text value="Not Done Value Set: Hemoglobin lab test"/>
      </code>
      <subject>🔗
        <reference value="Patient/example"/>
      </subject>
      <encounter>🔗
        <reference value="Encounter/example"/>
      </encounter>
      <effectivePeriod>
        <start value="2013-04-02T10:30:10+01:00"/>
        <end value="2013-04-05T10:30:10+01:00"/>
      </effectivePeriod>
      <issued value="2013-04-03T15:30:10+01:00"/>
      <performer>🔗
        <reference value="Organization/example1"/>
        <display value="Hendricks Country Hospital"/>
      </performer>
      <valueCodeableConcept>
        <extension
                   url="http://hl7.org/fhir/StructureDefinition/data-absent-reason">
          <valueCode value="not-performed"/>
        </extension>
      </valueCodeableConcept>
    </Observation>