<Observation xmlns="http://hl7.org/fhir">
  <id value="8" />
  <identifier>
    <type>
      <coding>
        <system value="http://terminology.hl7.org/CodeSystem/v2-0203" />
        <code value="OBI" />
      </coding>
    </type>
    <system value="https://exmaple.org/fhir/sid/test-lab-results" />
    <value value="123456" />
  </identifier>
  <status value="final" />
  <category>
    <coding>
      <system value="http://terminology.hl7.org/CodeSystem/observation-category" />
      <code value="laboratory" />
      <display value="Laboratory" />
    </coding>
  </category>
  <category>
    <coding>
      <system value="http://loinc.org" />
      <code value="26436-6" />
    </coding>
  </category>
  <code>
    <coding>
      <system value="http://loinc.org" />
      <code value="59826-8" />
      <display value="Creatinine [Moles/volume] in Blood" />
    </coding>
  </code>
  <subject>
    <reference value="Patient/1" />
  </subject>
  <effectiveDateTime value="2025-04-08T13:28:17-02:00" />
</Observation>