DeviceRequest 
Represents a request for a patient to employ a medical device. The device may be an implantable device, or an external assistive device, such as a walker.
= Must Support, = Is Modifier, = QiCore defined extension
| Field | Card. | Type | Description |
|---|---|---|---|
| doNotPerform | 0..1 | Extension | If true indicates that the request is asking for the specified action to not occur. |
| identifier | 0..* | List<Identifier> | Identifiers assigned to this order by the orderer or by the receiver. |
| status | 0..1 | String | The status of the request. Binding: Codes representing the status of the request. (required) |
| intent | 1..1 | String | Whether the request is a proposal, plan, an original order or a reflex order. Binding: The kind of diagnostic request. (required) |
| code[x] | 1..1 | Device | Concept | The details of the device to be used. Binding: Codes for devices that can be requested. (example) |
| subject | 1..1 | Patient | The patient who will use the device. |
| encounter | 0..1 | Encounter | An encounter that provides additional context in which this request is made. |
| occurrence[x] | 0..1 | DateTime | Interval<DateTime> | Timing | The timing schedule for the use of the device. The Schedule data type allows many different expressions, for example. "Every 8 hours"; "Three times a day"; "1/2 an hour before breakfast for 10 days from 23-Dec 2011:"; "15 Oct 2013, 17 Oct 2013 and 1 Nov 2013". |
| authoredOn | 0..1 | DateTime | When the request transitioned to being actionable. |
| requester | 0..1 | Device | Practitioner | PractitionerRole | Organization | The individual who initiated the request and has responsibility for its activation. |
| performer | 0..1 | Practitioner | PractitionerRole | Organization | CareTeam | Patient | Device | RelatedPerson | The desired performer for doing the diagnostic testing. |
| reasonReference | 0..* | List<Condition | Observation> | Reason or justification for the use of this device. |