<Observation xmlns="http://hl7.org/fhir" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://hl7.org/fhir file:///C:/FHIR/R4/fhir-all-xsd/fhir-single.xsd">
  <id value="592411" />
  <status value="registered" />
  <code>
    <!--     LOINC - always recommended to have a LOINC code     -->
    <coding>
      <system value="http://loinc.org" />
      <code value="29463-7" />
      <!--   more generic methodless LOINC   -->
      <display value="Body Weight" />
    </coding>
    <coding>
      <system value="http://loinc.org" />
      <code value="3141-9" />
      <!--   translation is more specific method = measured LOINC   -->
      <display value="Body weight Measured" />
    </coding>
    <!--     SNOMED CT Codes - becoming more common     -->
    <coding>
      <system value="http://snomed.info/sct" />
      <code value="27113001" />
      <display value="Body weight" />
    </coding>
    <!--     Also, a local code specific to the source system     -->
    <coding>
      <system value="http://acme.org/devices/clinical-codes" />
      <code value="body-weight" />
      <display value="Body Weight" />
    </coding>
  </code>
  <subject>
    <reference value="Patient/592410" />
  </subject>
  <effectiveDateTime value="2020-01-27" />
  <valueQuantity>
    <value value="99042" />
    <unit value="gram" />
    <system value="http://unitsofmeasure.org" />
    <code value="g" />
  </valueQuantity>
</Observation>