{"category":[{"coding":[{"code":"vital-signs","display":"Vital Signs","system":"http://terminology.hl7.org/CodeSystem/observation-category"}],"text":"Vital Signs"},{"coding":[{"code":"39156-5","display":"Body mass index (BMI) [Ratio]","system":"http://loinc.org"}]}],"code":{"coding":[{"code":"39156-5","display":"Body mass index (BMI) [Ratio]","system":"http://loinc.org"}],"text":"BMI"},"derivedFrom":[{"display":"Body Height","reference":"Observation/bodyheight"},{"display":"Body Weight","reference":"Observation/example"}],"effectiveDateTime":"1999-07-02","id":"bmi-using-related","resourceType":"Observation","status":"final","subject":{"reference":"Patient/example"},"valueQuantity":{"code":"kg/m2","system":"http://unitsofmeasure.org","unit":"kg/m2","value":16.2}}