Simple Head Circumference Example (id = "head-circumference")

<?xml version="1.0" encoding="UTF-8"?>

<Observation xmlns="http://hl7.org/fhir">
  <id value="head-circumference"/> 
  <meta> 
    <profile value="http://hl7.org/fhir/StructureDefinition/vitalsigns"/> 
  </meta> 
  <status value="final"/> 
  <category> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/observation-category"/> 
      <code value="vital-signs"/> 
      <display value="Vital Signs"/> 
    </coding> 
    <text value="Vital Signs"/> 
  </category> 
  <category> 
    <coding> 
      <system value="http://loinc.org"/> 
      <code value="9843-4"/> 
      <display value="Head Occipital-frontal circumference"/> 
    </coding> 
    <text value="Head Circumference"/> 
  </category> 
  <code> 
    <coding> 
      <system value="http://loinc.org"/> 
      <code value="9843-4"/> 
      <display value="Head Occipital-frontal circumference"/> 
    </coding> 
    <text value="Head Circumference"/> 
  </code> 
  <subject> 
    <reference value="Patient/example"/> 
  </subject> 
  <effectiveDateTime value="1999-07-02"/> 
  <valueQuantity> 
    <value value="51.2"/> 
    <unit value="cm"/> 
    <system value="http://unitsofmeasure.org"/> 
    <code value="cm"/> 
  </valueQuantity> 
</Observation>