> ## Documentation Index
> Fetch the complete documentation index at: https://docs.metriport.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Communication

> An occurrence of information being transmitted; e.g. an alert that was sent to a responsible provider, a public health agency that was notified about a reportable condition.

## Properties

| Name | Required | Type | Description |
| - | - | - | - |
| identifier | No | [Identifier](/medical-api/fhir/data-types/identifier)\[] | Unique identifier |
| instantiatesCanonical | No | canonical\[] | Instantiates FHIR protocol or definition |
| instantiatesUri | No | uri\[] | Instantiates external protocol or definition |
| basedOn | No | Reference\<Resource>\[] | Request fulfilled by this communication |
| partOf | No | Reference\<Resource>\[] | Part of this action |
| inResponseTo | No | Reference\<[Communication](/medical-api/fhir/resources/communication)>\[] | Reply to |
| status | Yes | code | preparation / in-progress / not-done / on-hold / stopped / completed / entered-in-error / unknown |
| statusReason | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Reason for current status |
| category | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Message category |
| priority | No | code | routine / urgent / asap / stat |
| medium | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | A channel of communication |
| subject | No | Reference\<[Patient](/medical-api/fhir/resources/patient) / [Group](/medical-api/fhir/resources/group)> | Focus of message |
| topic | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Description of the purpose/content |
| about | No | Reference\<Resource>\[] | Resources that pertain to this communication |
| encounter | No | Reference\<[Encounter](/medical-api/fhir/resources/encounter)> | Encounter created as part of |
| sent | No | dateTime | When sent |
| received | No | dateTime | When received |
| recipient | No | Reference\<[Device](/medical-api/fhir/resources/device) / [Organization](/medical-api/fhir/resources/organization) / [Patient](/medical-api/fhir/resources/patient) / [Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [RelatedPerson](/medical-api/fhir/resources/relatedperson) / [Group](/medical-api/fhir/resources/group) / [CareTeam](/medical-api/fhir/resources/careteam) / [HealthcareService](/medical-api/fhir/resources/healthcareservice)>\[] | Message recipient |
| sender | No | Reference\<[Device](/medical-api/fhir/resources/device) / [Organization](/medical-api/fhir/resources/organization) / [Patient](/medical-api/fhir/resources/patient) / [Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [RelatedPerson](/medical-api/fhir/resources/relatedperson) / [HealthcareService](/medical-api/fhir/resources/healthcareservice)> | Message sender |
| reasonCode | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Indication for message |
| reasonReference | No | Reference\<[Condition](/medical-api/fhir/resources/condition) / [Observation](/medical-api/fhir/resources/observation) / [DiagnosticReport](/medical-api/fhir/resources/diagnosticreport) / [DocumentReference](/medical-api/fhir/resources/documentreference)>\[] | Why was communication done? |
| payload | No | CommunicationPayload | Message payload |
| - id | No | string | Unique id for inter-element referencing |
| - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations |
| - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized |
| - content\[x] | Yes | string, [Attachment](/medical-api/fhir/data-types/attachment), Reference\<Resource> | Message part content |
| note | No | [Annotation](/medical-api/fhir/data-types/annotation)\[] | Comments made about the communication |

## Search Parameters

| Name | Type | Description | Expression |
| - | - | - | - |
| based-on | reference | Request fulfilled by this communication | Communication.basedOn |
| category | token | Message category | Communication.category |
| encounter | reference | Encounter created as part of | Communication.encounter |
| identifier | token | Unique identifier | Communication.identifier |
| instantiates-canonical | reference | Instantiates FHIR protocol or definition | Communication.instantiatesCanonical |
| instantiates-uri | uri | Instantiates external protocol or definition | Communication.instantiatesUri |
| medium | token | A channel of communication | Communication.medium |
| part-of | reference | Part of this action | Communication.partOf |
| patient | reference | Focus of message | Communication.subject |
| received | date | When received | Communication.received |
| recipient | reference | Message recipient | Communication.recipient |
| sender | reference | Message sender | Communication.sender |
| sent | date | When sent | Communication.sent |
| status | token | preparation / in-progress / not-done / on-hold / stopped / completed / entered-in-error / unknown | Communication.status |
| subject | reference | Focus of message | Communication.subject |

## Inherited Properties

| Name | Required | Type | Description |
| - | - | - | - |
| id | No | string | Logical id of this artifact |
| meta | No | [Meta](/medical-api/fhir/data-types/meta) | Metadata about the resource |
| implicitRules | No | uri | A set of rules under which this content was created |
| language | No | code | Language of the resource content |
| text | No | [Narrative](/medical-api/fhir/data-types/narrative) | Text summary of the resource, for human interpretation |
| contained | No | Resource\[] | Contained, inline Resources |
| extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations |
| modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored |

To view the FHIR specification for this resource, see [Communication](https://www.hl7.org/fhir/StructureDefinition/Communication).


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.