2026 US Quality Core Implementation Guide
0.5.0 - release

2026 US Quality Core Implementation Guide - Downloaded Version 0.5.0 See the Directory of published versions

## Resource Profile: US Quality Core DeviceRequest

Official URL: http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-devicerequest | Version: 0.5.0 | Highlight text changes?
Active as of 2026-06-05 | Computable Name: USQualityCoreDeviceRequest

Profile of DeviceRequest for decision support/quality metrics. Defines the core set of elements and extensions for quality rule and measure authors.

### USCDI+ Quality Element Support Expectations

Systems are expected to support this profile as part of implementing USCDI+ Quality V1 in FHIR and meeting the conformance requirements of this guide.

The following elements are specifically relevant to USCDI+ Quality V1 data classes and elements. Systems are expected to support these elements as applicable to their role in US Quality Core data exchange. See the Must Support section of this guide for more information. These elements are tagged as (USCDI+ Quality) in the formal profile views.

USCDI+ Quality Elements:

- code[x]: (USCDI+ Quality) Device requested

The Formal Views section also provides the formal summary, definitions, terminology requirements, and mandatory element requirements.

### Profile Specific Implementation Guidance

To represent that a device request was intentionally not requested for a medical, patient, or system reason, use the US Quality Core Device Not Requested profile.

Additional informational guidance for authoring CQL using this profile is provided in the CQL Authoring Usage (Informational) section of this page.

Usages:

- Refer to this Profile: US Quality Core Claim
- Examples for this Profile: DeviceRequest/example
- CapabilityStatements using this Profile: US Quality Core Client CapabilityStatement and US Quality Core Server CapabilityStatement

You can also check for usages in the FHIR IG Statistics

### Formal Views of Profile Content

Description Differentials, Snapshots, and other representations.

- Key Elements Table
- Differential Table
- Snapshot Table
- Statistics/References
- All

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
DeviceRequest |  | 0..* | DeviceRequest | Medical device request
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
Slices for modifierExtension | ?! | 0..* | Extension | Extension Slice: Unordered, Open by value:url
modifierExtension:doNotPerform | ?! | 0..1 | (Complex) | Extension URL: http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform"
value[x] |  | 1..1 | boolean | Value of extension Fixed Value: false
identifier | Σ | 0..* | Identifier | External Request identifier
status | ?!Σ | 0..1 | code | draft | active | on-hold | revoked | completed | entered-in-error | unknown Binding: RequestStatus (required): Codes representing the status of the request.
intent | ?!Σ | 1..1 | code | proposal | plan | directive | order | original-order | reflex-order | filler-order | instance-order | option Binding: RequestIntent (required): The kind of diagnostic request.
code[x] | Σ | 1..1 |  | (USCDI+ Quality) Device requested Binding: FHIRDeviceTypes (preferred)
codeReference |  |  | Reference(Device) |
codeCodeableConcept |  |  | CodeableConcept |
subject | Σ | 1..1 | Reference(US Quality Core Patient) | Focus of request
authoredOn | Σ | 0..1 | dateTime | When recorded
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
DeviceRequest.status | Base | required | RequestStatus | 📍4.0.1 | FHIR Std.
DeviceRequest.intent | Base | required | RequestIntent | 📍4.0.1 | FHIR Std.
DeviceRequest.code[x] | Base | preferred | FHIR Device Types | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
dom-2 | error | DeviceRequest | If the resource is contained in another resource, it SHALL NOT contain nested Resources | `contained.contained.empty()`
dom-3 | error | DeviceRequest | If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource | `contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()`
dom-4 | error | DeviceRequest | If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated | `contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()`
dom-5 | error | DeviceRequest | If a resource is contained in another resource, it SHALL NOT have a security label | `contained.meta.security.empty()`
dom-6 | best practice | DeviceRequest | A resource should have narrative for robust management | `text.`div`.exists()`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
DeviceRequest |  | 0..* | DeviceRequest | Medical device request
Slices for modifierExtension |  |  |  | Content/Rules for all slices
modifierExtension:doNotPerform | ?! | 0..1 | (Complex) | Extension URL: http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform
value[x] |  | 1..1 | boolean | Value of extension Fixed Value: false
identifier |  | 0..* | Identifier | External Request identifier
status |  | 0..1 | code | draft | active | on-hold | revoked | completed | entered-in-error | unknown
intent |  | 1..1 | code | proposal | plan | directive | order | original-order | reflex-order | filler-order | instance-order | option
code[x] |  | 1..1 | Reference(Device), CodeableConcept | (USCDI+ Quality) Device requested Binding: FHIRDeviceTypes (preferred)
subject |  | 1..1 | Reference(US Quality Core Patient) | Focus of request
authoredOn |  | 0..1 | dateTime | When recorded
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
DeviceRequest.code[x] | Base | preferred | FHIR Device Types | 📦4.0.1 | FHIR Std.

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
DeviceRequest |  | 0..* | DeviceRequest | Medical device request
id | Σ | 0..1 | id | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
text |  | 0..1 | Narrative | Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements
contained |  | 0..* | Resource | Contained, inline Resources
extension |  | 0..* | Extension | Additional content defined by implementations
Slices for modifierExtension | ?! | 0..* | Extension | Extension Slice: Unordered, Open by value:url
modifierExtension:doNotPerform | ?! | 0..1 | (Complex) | Extension URL: http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform"
value[x] |  | 1..1 | boolean | Value of extension Fixed Value: false
identifier | Σ | 0..* | Identifier | External Request identifier
instantiatesCanonical | Σ | 0..* | canonical(ActivityDefinition | PlanDefinition) | Instantiates FHIR protocol or definition
instantiatesUri | Σ | 0..* | uri | Instantiates external protocol or definition
basedOn | Σ | 0..* | Reference(Resource) | What request fulfills
priorRequest | Σ | 0..* | Reference(Resource) | What request replaces
groupIdentifier | Σ | 0..1 | Identifier | Identifier of composite request
status | ?!Σ | 0..1 | code | draft | active | on-hold | revoked | completed | entered-in-error | unknown Binding: RequestStatus (required): Codes representing the status of the request.
intent | ?!Σ | 1..1 | code | proposal | plan | directive | order | original-order | reflex-order | filler-order | instance-order | option Binding: RequestIntent (required): The kind of diagnostic request.
priority | Σ | 0..1 | code | routine | urgent | asap | stat Binding: RequestPriority (required): Identifies the level of importance to be assigned to actioning the request.
code[x] | Σ | 1..1 |  | (USCDI+ Quality) Device requested Binding: FHIRDeviceTypes (preferred)
codeReference |  |  | Reference(Device) |
codeCodeableConcept |  |  | CodeableConcept |
parameter |  | 0..* | BackboneElement | Device details
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
code |  | 0..1 | CodeableConcept | Device detail Binding Description: (example): A code that identifies the device detail.
value[x] |  | 0..1 |  | Value of detail
valueCodeableConcept |  |  | CodeableConcept |
valueQuantity |  |  | Quantity |
valueRange |  |  | Range |
valueBoolean |  |  | boolean |
subject | Σ | 1..1 | Reference(US Quality Core Patient) | Focus of request
encounter | Σ | 0..1 | Reference(Encounter) | Encounter motivating request
occurrence[x] | Σ | 0..1 |  | Desired time or schedule for use
occurrenceDateTime |  |  | dateTime |
occurrencePeriod |  |  | Period |
occurrenceTiming |  |  | Timing |
authoredOn | Σ | 0..1 | dateTime | When recorded
requester | Σ | 0..1 | Reference(Device | Practitioner | PractitionerRole | Organization) | Who/what is requesting diagnostics
performerType | Σ | 0..1 | CodeableConcept | Filler role Binding: ParticipantRoles (example): Indicates specific responsibility of an individual within the care team, such as "Primary physician", "Team coordinator", "Caregiver", etc.
performer | Σ | 0..1 | Reference(Practitioner | PractitionerRole | Organization | CareTeam | HealthcareService | Patient | Device | RelatedPerson) | Requested Filler
reasonCode | Σ | 0..* | CodeableConcept | Coded Reason for request Binding: Condition/Problem/DiagnosisCodes (example): Diagnosis or problem codes justifying the reason for requesting the device.
reasonReference | Σ | 0..* | Reference(Condition | Observation | DiagnosticReport | DocumentReference) | Linked Reason for request
insurance |  | 0..* | Reference(Coverage | ClaimResponse) | Associated insurance coverage
supportingInfo |  | 0..* | Reference(Resource) | Additional clinical information
note |  | 0..* | Annotation | Notes or comments
relevantHistory |  | 0..* | Reference(Provenance) | Request provenance
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
DeviceRequest.language | Base | preferred | Common Languages | 📍4.0.1 | FHIR Std.
DeviceRequest.status | Base | required | RequestStatus | 📍4.0.1 | FHIR Std.
DeviceRequest.intent | Base | required | RequestIntent | 📍4.0.1 | FHIR Std.
DeviceRequest.priority | Base | required | Request priority | 📍4.0.1 | FHIR Std.
DeviceRequest.code[x] | Base | preferred | FHIR Device Types | 📦4.0.1 | FHIR Std.
DeviceRequest.parameter.​code | Base | example |  | Not State | Unknown
DeviceRequest.performerType | Base | example | Participant Roles | 📍4.0.1 | FHIR Std.
DeviceRequest.reasonCode | Base | example | Condition/Problem/Diagnosis Codes | 📍4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
dom-2 | error | DeviceRequest | If the resource is contained in another resource, it SHALL NOT contain nested Resources | `contained.contained.empty()`
dom-3 | error | DeviceRequest | If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource | `contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()`
dom-4 | error | DeviceRequest | If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated | `contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()`
dom-5 | error | DeviceRequest | If a resource is contained in another resource, it SHALL NOT have a security label | `contained.meta.security.empty()`
dom-6 | best practice | DeviceRequest | A resource should have narrative for robust management | `text.`div`.exists()`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Summary

Mandatory: 0 element(1 nested mandatory element)
Fixed: 1 element

Structures

This structure refers to these other structures:

- US Quality Core Patient (http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-patient)

Extensions

This structure refers to these extensions:

- http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform (Modifier)

Key Elements View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
DeviceRequest |  | 0..* | DeviceRequest | Medical device request
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
Slices for modifierExtension | ?! | 0..* | Extension | Extension Slice: Unordered, Open by value:url
modifierExtension:doNotPerform | ?! | 0..1 | (Complex) | Extension URL: http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform"
value[x] |  | 1..1 | boolean | Value of extension Fixed Value: false
identifier | Σ | 0..* | Identifier | External Request identifier
status | ?!Σ | 0..1 | code | draft | active | on-hold | revoked | completed | entered-in-error | unknown Binding: RequestStatus (required): Codes representing the status of the request.
intent | ?!Σ | 1..1 | code | proposal | plan | directive | order | original-order | reflex-order | filler-order | instance-order | option Binding: RequestIntent (required): The kind of diagnostic request.
code[x] | Σ | 1..1 |  | (USCDI+ Quality) Device requested Binding: FHIRDeviceTypes (preferred)
codeReference |  |  | Reference(Device) |
codeCodeableConcept |  |  | CodeableConcept |
subject | Σ | 1..1 | Reference(US Quality Core Patient) | Focus of request
authoredOn | Σ | 0..1 | dateTime | When recorded
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
DeviceRequest.status | Base | required | RequestStatus | 📍4.0.1 | FHIR Std.
DeviceRequest.intent | Base | required | RequestIntent | 📍4.0.1 | FHIR Std.
DeviceRequest.code[x] | Base | preferred | FHIR Device Types | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
dom-2 | error | DeviceRequest | If the resource is contained in another resource, it SHALL NOT contain nested Resources | `contained.contained.empty()`
dom-3 | error | DeviceRequest | If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource | `contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()`
dom-4 | error | DeviceRequest | If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated | `contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()`
dom-5 | error | DeviceRequest | If a resource is contained in another resource, it SHALL NOT have a security label | `contained.meta.security.empty()`
dom-6 | best practice | DeviceRequest | A resource should have narrative for robust management | `text.`div`.exists()`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Differential View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
DeviceRequest |  | 0..* | DeviceRequest | Medical device request
Slices for modifierExtension |  |  |  | Content/Rules for all slices
modifierExtension:doNotPerform | ?! | 0..1 | (Complex) | Extension URL: http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform
value[x] |  | 1..1 | boolean | Value of extension Fixed Value: false
identifier |  | 0..* | Identifier | External Request identifier
status |  | 0..1 | code | draft | active | on-hold | revoked | completed | entered-in-error | unknown
intent |  | 1..1 | code | proposal | plan | directive | order | original-order | reflex-order | filler-order | instance-order | option
code[x] |  | 1..1 | Reference(Device), CodeableConcept | (USCDI+ Quality) Device requested Binding: FHIRDeviceTypes (preferred)
subject |  | 1..1 | Reference(US Quality Core Patient) | Focus of request
authoredOn |  | 0..1 | dateTime | When recorded
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
DeviceRequest.code[x] | Base | preferred | FHIR Device Types | 📦4.0.1 | FHIR Std.

Snapshot ViewView

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
DeviceRequest |  | 0..* | DeviceRequest | Medical device request
id | Σ | 0..1 | id | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
text |  | 0..1 | Narrative | Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements
contained |  | 0..* | Resource | Contained, inline Resources
extension |  | 0..* | Extension | Additional content defined by implementations
Slices for modifierExtension | ?! | 0..* | Extension | Extension Slice: Unordered, Open by value:url
modifierExtension:doNotPerform | ?! | 0..1 | (Complex) | Extension URL: http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  | Extension Slice: Unordered, Open by value:url
url |  | 1..1 | uri | "http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform"
value[x] |  | 1..1 | boolean | Value of extension Fixed Value: false
identifier | Σ | 0..* | Identifier | External Request identifier
instantiatesCanonical | Σ | 0..* | canonical(ActivityDefinition | PlanDefinition) | Instantiates FHIR protocol or definition
instantiatesUri | Σ | 0..* | uri | Instantiates external protocol or definition
basedOn | Σ | 0..* | Reference(Resource) | What request fulfills
priorRequest | Σ | 0..* | Reference(Resource) | What request replaces
groupIdentifier | Σ | 0..1 | Identifier | Identifier of composite request
status | ?!Σ | 0..1 | code | draft | active | on-hold | revoked | completed | entered-in-error | unknown Binding: RequestStatus (required): Codes representing the status of the request.
intent | ?!Σ | 1..1 | code | proposal | plan | directive | order | original-order | reflex-order | filler-order | instance-order | option Binding: RequestIntent (required): The kind of diagnostic request.
priority | Σ | 0..1 | code | routine | urgent | asap | stat Binding: RequestPriority (required): Identifies the level of importance to be assigned to actioning the request.
code[x] | Σ | 1..1 |  | (USCDI+ Quality) Device requested Binding: FHIRDeviceTypes (preferred)
codeReference |  |  | Reference(Device) |
codeCodeableConcept |  |  | CodeableConcept |
parameter |  | 0..* | BackboneElement | Device details
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
code |  | 0..1 | CodeableConcept | Device detail Binding Description: (example): A code that identifies the device detail.
value[x] |  | 0..1 |  | Value of detail
valueCodeableConcept |  |  | CodeableConcept |
valueQuantity |  |  | Quantity |
valueRange |  |  | Range |
valueBoolean |  |  | boolean |
subject | Σ | 1..1 | Reference(US Quality Core Patient) | Focus of request
encounter | Σ | 0..1 | Reference(Encounter) | Encounter motivating request
occurrence[x] | Σ | 0..1 |  | Desired time or schedule for use
occurrenceDateTime |  |  | dateTime |
occurrencePeriod |  |  | Period |
occurrenceTiming |  |  | Timing |
authoredOn | Σ | 0..1 | dateTime | When recorded
requester | Σ | 0..1 | Reference(Device | Practitioner | PractitionerRole | Organization) | Who/what is requesting diagnostics
performerType | Σ | 0..1 | CodeableConcept | Filler role Binding: ParticipantRoles (example): Indicates specific responsibility of an individual within the care team, such as "Primary physician", "Team coordinator", "Caregiver", etc.
performer | Σ | 0..1 | Reference(Practitioner | PractitionerRole | Organization | CareTeam | HealthcareService | Patient | Device | RelatedPerson) | Requested Filler
reasonCode | Σ | 0..* | CodeableConcept | Coded Reason for request Binding: Condition/Problem/DiagnosisCodes (example): Diagnosis or problem codes justifying the reason for requesting the device.
reasonReference | Σ | 0..* | Reference(Condition | Observation | DiagnosticReport | DocumentReference) | Linked Reason for request
insurance |  | 0..* | Reference(Coverage | ClaimResponse) | Associated insurance coverage
supportingInfo |  | 0..* | Reference(Resource) | Additional clinical information
note |  | 0..* | Annotation | Notes or comments
relevantHistory |  | 0..* | Reference(Provenance) | Request provenance
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
DeviceRequest.language | Base | preferred | Common Languages | 📍4.0.1 | FHIR Std.
DeviceRequest.status | Base | required | RequestStatus | 📍4.0.1 | FHIR Std.
DeviceRequest.intent | Base | required | RequestIntent | 📍4.0.1 | FHIR Std.
DeviceRequest.priority | Base | required | Request priority | 📍4.0.1 | FHIR Std.
DeviceRequest.code[x] | Base | preferred | FHIR Device Types | 📦4.0.1 | FHIR Std.
DeviceRequest.parameter.​code | Base | example |  | Not State | Unknown
DeviceRequest.performerType | Base | example | Participant Roles | 📍4.0.1 | FHIR Std.
DeviceRequest.reasonCode | Base | example | Condition/Problem/Diagnosis Codes | 📍4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
dom-2 | error | DeviceRequest | If the resource is contained in another resource, it SHALL NOT contain nested Resources | `contained.contained.empty()`
dom-3 | error | DeviceRequest | If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource | `contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()`
dom-4 | error | DeviceRequest | If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated | `contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()`
dom-5 | error | DeviceRequest | If a resource is contained in another resource, it SHALL NOT have a security label | `contained.meta.security.empty()`
dom-6 | best practice | DeviceRequest | A resource should have narrative for robust management | `text.`div`.exists()`
ele-1 | error | **ALL** elements | All FHIR elements must have a @value or children | `hasValue() or (children().count() > id.count())`
ext-1 | error | **ALL** extensions | Must have either extensions or value[x], not both | `extension.exists() != value.exists()`

Summary

Mandatory: 0 element(1 nested mandatory element)
Fixed: 1 element

Structures

This structure refers to these other structures:

- US Quality Core Patient (http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-patient)

Extensions

This structure refers to these extensions:

- http://hl7.org/fhir/5.0/StructureDefinition/extension-DeviceRequest.doNotPerform (Modifier)

Other representations of profile: CSV, Excel, Schematron

### Notes:

#### CQL Authoring Usage (Informational)

The FHIR R4 DeviceRequest resource and the US Quality Core DeviceRequest profile describe a request for a patient to use a device. The device may be any pertinent device specified in the Device resource. Examples of devices that may be requested include a wheelchair, hearing aids, or an insulin pump. The request may lead to the dispensing of the device to the patient or for use by the patient. Orders or recommendations for use of a device for a patient use the ServiceRequest resource.

To create an expression specifically requesting information that a DeviceRequest intentionally did not occur for a medical, patient or system reason, use the profile USQualityCore-Devicenotrequested.

The following example illustrates the use of DeviceRequest:

    define "Device Indicating Frailty":
      [DeviceRequest: "Frailty Device"] FrailtyDeviceOrder
        where FrailtyDeviceOrder.status in { 'active', 'on-hold', 'completed' }
          and FrailtyDeviceOrder.intent in { 'order', 'original-order', 'reflex-order', 'filler-order', 'instance-order' }