Dose syntax implementation guidance for FHIR STU3

This guidance is under active development by NHS Digital and content may be added or updated on a regular basis.

Microgynon 30 tablets (Bayer Plc), 63 tablets

Product-based prescription using additional instruction field to convey dosing instructions.

This example includes a dispenseRequest instruction so represents the clinical information that could be shared as part of a FHIR-based primary care prescription between a prescribing and dispensing clinical system.

<MedicationRequest xmlns="http://hl7.org/fhir">
    <id value="68ed456c-4fbb-4e7c-b431-321e06a6fdf9" />
    <contained>
        <Medication>
            <id value="med1" />
            <code>
                <coding>
                    <system value="http://snomed.info/sct" />
                    <code value="42111000001107" />
                    <display value="Microgynon 30 tablets (Bayer Plc)" />
                </coding>
            </code>
        </Medication>
    </contained>
    <status value="active" />
    <intent value="order" />
    <medicationReference>
        <reference value="#med1" />
    </medicationReference>
    <subject>
        <identifier>
            <system value="https://fhir.nhs.uk/Id/nhs-number" />
            <value value="9999999999" />
        </identifier>
    </subject>
    <dosageInstruction>
        <additionalInstruction>
            <coding>
                <system value="http://snomed.info/sct" />
                <code value="421769005" />
                <display value="Follow directions" />
            </coding>
        </additionalInstruction>
    </dosageInstruction>
    <dispenseRequest>
        <quantity>
            <value value="63" />
            <unit value="tablet" />
            <system value="http://snomed.info/sct" />
            <code value="428673006" />
        </quantity>
    </dispenseRequest>
</MedicationRequest>

{
    "resourceType": "MedicationRequest",
    "id": "68ed456c-4fbb-4e7c-b431-321e06a6fdf9",
    "contained":  [
        {
            "resourceType": "Medication",
            "id": "med1",
            "code": {
                "coding":  [
                    {
                        "system": "http://snomed.info/sct",
                        "code": "42111000001107",
                        "display": "Microgynon 30 tablets (Bayer Plc)"
                    }
                ]
            }
        }
    ],
    "status": "active",
    "intent": "order",
    "medicationReference": {
        "reference": "#med1"
    },
    "subject": {
        "identifier": {
            "system": "https://fhir.nhs.uk/Id/nhs-number",
            "value": "9999999999"
        }
    },
    "dosageInstruction":  [
        {
            "additionalInstruction":  [
                {
                    "coding":  [
                        {
                            "system": "http://snomed.info/sct",
                            "code": "421769005",
                            "display": "Follow directions"
                        }
                    ]
                }
            ]
        }
    ],
    "dispenseRequest": {
        "quantity": {
            "value": 63,
            "unit": "tablet",
            "system": "http://snomed.info/sct",
            "code": "428673006"
        }
    }
}
MedicationRequest.id[0]68ed456c-4fbb-4e7c-b431-321e06a6fdf9
MedicationRequest.contained[0].id[0]med1
MedicationRequest.contained[0].code[0].coding[0].system[0]http://snomed.info/sct
MedicationRequest.contained[0].code[0].coding[0].code[0]42111000001107
MedicationRequest.contained[0].code[0].coding[0].display[0]Microgynon 30 tablets (Bayer Plc)
MedicationRequest.status[0]active
MedicationRequest.intent[0]order
MedicationRequest.medication[0].reference[0]#med1
MedicationRequest.subject[0].identifier[0].system[0]https://fhir.nhs.uk/Id/nhs-number
MedicationRequest.subject[0].identifier[0].value[0]9999999999
MedicationRequest.dosageInstruction[0].additionalInstruction[0].coding[0].system[0]http://snomed.info/sct
MedicationRequest.dosageInstruction[0].additionalInstruction[0].coding[0].code[0]421769005
MedicationRequest.dosageInstruction[0].additionalInstruction[0].coding[0].display[0]Follow directions
MedicationRequest.dispenseRequest[0].quantity[0].value[0]63
MedicationRequest.dispenseRequest[0].quantity[0].unit[0]tablet
MedicationRequest.dispenseRequest[0].quantity[0].system[0]http://snomed.info/sct
MedicationRequest.dispenseRequest[0].quantity[0].code[0]428673006
MedicationRequest
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