Clinical Observations

<Observation xmlns="http://hl7.org/fhir">
    <id value="HeadCircumferenceObservation" />
    <identifier>
        <system value="https://tools.ietf.org/html/rfc4122" />
        <value value="a816aa76-6e4f-410a-b0e0-7c6230a5cb7a" />
    </identifier>
    <status value="final" />
    <category>
        <coding>
            <system value="http://terminology.hl7.org/CodeSystem/observation-category" />
            <code value="vital-signs" />
            <display value="Vital Signs" />
        </coding>
    </category>
    <code>
        <coding>
            <system value="http://snomed.info/sct" />
            <code value="363811000" />
            <display value="Head circumference measure" />
        </coding>
        <coding>
            <system value="http://loinc.org" />
            <code value="9843-4" />
            <display value="Head Occipital-frontal circumference" />
        </coding>
    </code>
    <subject>
        <reference value="Patient/30d3de6f-e800-47fa-b610-b02c7c8e9d57" />
    </subject>
    <effectiveDateTime value="2018-10-04T14:17:59+01:00" />
    <performer>
        <reference value="Practitioner/627be677-3eb2-4db4-9570-5669fd8c92f5" />
    </performer>
    <performer>
        <reference value="Organization/cdaea3db-8b40-41dc-9834-b42503e12382" />
    </performer>
    <valueQuantity>
        <value value="41.2" />
        <unit value="centimeter" />
        <system value="http://unitsofmeasure.org" />
        <code value="cm" />
    </valueQuantity>
</Observation>

{
    "resourceType": "Observation",
    "id": "HeadCircumferenceObservation",
    "identifier":  [
        {
            "system": "https://tools.ietf.org/html/rfc4122",
            "value": "a816aa76-6e4f-410a-b0e0-7c6230a5cb7a"
        }
    ],
    "status": "final",
    "category":  [
        {
            "coding":  [
                {
                    "system": "http://terminology.hl7.org/CodeSystem/observation-category",
                    "code": "vital-signs",
                    "display": "Vital Signs"
                }
            ]
        }
    ],
    "code": {
        "coding":  [
            {
                "system": "http://snomed.info/sct",
                "code": "363811000",
                "display": "Head circumference measure"
            },
            {
                "system": "http://loinc.org",
                "code": "9843-4",
                "display": "Head Occipital-frontal circumference"
            }
        ]
    },
    "subject": {
        "reference": "Patient/30d3de6f-e800-47fa-b610-b02c7c8e9d57"
    },
    "effectiveDateTime": "2018-10-04T14:17:59+01:00",
    "performer":  [
        {
            "reference": "Practitioner/627be677-3eb2-4db4-9570-5669fd8c92f5"
        },
        {
            "reference": "Organization/cdaea3db-8b40-41dc-9834-b42503e12382"
        }
    ],
    "valueQuantity": {
        "value": 41.2,
        "unit": "centimeter",
        "system": "http://unitsofmeasure.org",
        "code": "cm"
    }
}