<Observation xmlns="http://hl7.org/fhir">
  <id value="cgmSummaryDaysOfWearExample" />
  <meta>
    <profile value="http://hl7.org/fhir/uv/cgm/StructureDefinition/cgm-summary-days-of-wear" />
  </meta>
  <status value="final" />
  <category>
    <coding>
      <system value="http://terminology.hl7.org/CodeSystem/observation-category" />
      <code value="laboratory" />
    </coding>
  </category>
  <code>
    <coding>
      <system value="http://loinc.org" />
      <code value="104636-6" />
    </coding>
  </code>
  <subject>
    <reference value="Patient/patientExample" />
  </subject>
  <effectivePeriod>
    <start value="2025-09-01" />
    <end value="2025-09-30" />
  </effectivePeriod>
  <valueQuantity>
    <value value="28" />
    <unit value="days" />
    <system value="http://unitsofmeasure.org" />
    <code value="d" />
  </valueQuantity>
</Observation>