<Observation xmlns="http://hl7.org/fhir">
    <id value="aed6f48f-9a73-49e4-bfbe-4a6b9b67b9ef" />
    <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="2132-9" />
            <display value="Cobalamin (Vitamin B12) [Mass/volume] in Serum or Plasma" />
        </coding>
        <text value="Cobalamin (Vitamin B12) [Mass/volume] in Serum or Plasma" />
    </code>
    <subject>
        <reference value="Patient/80bdf638-377b-4bea-bbc2-0b337699e6a4" />
    </subject>
    <encounter>
        <reference value="Encounter/29b2a65f-e1ca-4253-9452-17156a7d681d" />
    </encounter>
    <effectiveDateTime value="2020-03-01T14:39:45-05:00" />
    <issued value="2020-03-01T14:39:45.361-05:00" />
    <valueQuantity>
        <value value="684.23" />
        <unit value="pg/mL" />
        <system value="http://unitsofmeasure.org" />
        <code value="pg/mL" />
    </valueQuantity>
</Observation>