<Observation xmlns="http://hl7.org/fhir">
  <id value="aab63692-508b-46e4-a58c-d8c8bbb83311" />
  <meta>
    <versionId value="1" />
    <lastUpdated value="2021-03-12T10:53:38.611-05:00" />
    <source value="#Ekl0bxZEvVDy25Sx" />
  </meta>
  <status value="final" />
  <category>
    <coding>
      <system value="http://terminology.hl7.org/CodeSystem/observation-category" />
      <code value="laboratory" />
      <display value="laboratory" />
    </coding>
  </category>
  <code>
    <coding>
      <system value="http://loinc.org" />
      <code value="19123-9" />
      <display value="Magnesium [Mass/volume] in Serum or Plasma" />
    </coding>
    <text value="Magnesium [Mass/volume] in Serum or Plasma" />
  </code>
  <subject>
    <reference value="Patient/80bdf638-377b-4bea-bbc2-0b337699e6a4" />
  </subject>
  <encounter>
    <reference value="Encounter/715a9fb6-e89e-4ff3-bae8-a959f9141ff9" />
  </encounter>
  <effectiveDateTime value="2020-03-02T15:26:45-05:00" />
  <issued value="2020-03-02T15:26:45.361-05:00" />
  <valueQuantity>
    <value value="2.152" />
    <unit value="mg/dL" />
    <system value="http://unitsofmeasure.org" />
    <code value="mg/dL" />
  </valueQuantity>
</Observation>