| # | | Name | Source | Ver | Description |
| 1 | | CommunicatedDiagnosis | hl7.fhir.us.davinci-pas#current | R4 | A code representing the diagnosis that is the subject of the communication |
| 2 | | CommunicationRequest Initiating Location | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Location where the information being requested to be communicated happened. |
| 3 | | Complies with | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | The action requested by this resource is intended to satisfy the expectations established by the referenced Definition resource. |
| 4 | | ContentModifier | hl7.fhir.us.davinci-pas#current | R4 | A code representing a modifier of the content being requested |
| 5 | | Coverage Information | hl7.fhir.us.davinci-crd#current | R4 | Captures assertions from a payer about whether the service is covered and/or requires prior authorization. |
| 6 | | Episode of care | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Identifies the episode(s) of care that this resource is relevant to. Establishes the EpisodeOfCare as a 'grouper' of resources that are relevant to that episode. |
| 7 | | Generated from | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | This artifact was algorithmically produced by applying the referenced artifact to the context relevant for this request. |
| 8 | | Protective factor | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Characteristics or strengths of individuals, families, community situations or societies that mitigate risks and promote positivewell-being and healthy development; attributes that help to successfully navigate difficult situations; factors that may contribute to or explain positive outcomes. A trait or habit that "protects" people and makes them less likely to get a chronic disease that include, but are not limited to exercise, healthy eating, managing weight, managing blood pressure and cholesterol, managing mental health, feeling happy, strong emotional support and social connections. |
| 9 | | Release date | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Indicates the date on which request or event resource that has a status of 'on-hold' or 'suspended' should be moved back to an active state. |
| 10 | | Relevant history | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Links to Provenance records for past versions of this resource or fulfilling request or event resources that identify key state transitions or updates that are likely to be relevant to a user looking at the current version of the resource. |
| 11 | | ServiceLineNumber | hl7.fhir.us.davinci-pas#current | R4 | A number that links the content being requested with the claim item number. |
| 12 | | Shall comply with | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | In satisfying this request or instantiating this definition, the expectations defined in the Definition resource are expected to be met. (This allows requirements defined elsewhere to be brought into play by reference rather than providing all of the detail in-line necessary to satisfy the referenced Definition.). |
| 13 | | Supporting info | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Other resources *from the patient record* that may be relevant to the event. The information from these resources was either used to create the instance or is provided to help with its interpretation. This extension **should not** be used if more specific inline elements or extensions are available. For example, use `Observation.hasMember` instead of supportingInformation for representing the members of an Observation panel. |
| 14 | | Triggered by | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | This resource came into being as a result of expectations set in the referenced Definition resource. I.e. This resource represents a 'step' dictated within the protocol/order set/etc. |
| 15 | | Workflow Barrier | hl7.fhir.uv.extensions.r4#1.0.0 | R4 | Any obstacle that limits or prevents obtaining care. Barriers in health and social care include, but are not limited to, physical barriers, psychological barriers, physiological barriers, financial barriers, geographical barriers, cultural/language barriers and resource barriers. |