---
type: "search-params"
title: "Communication Search Parameters"
resource: "Communication"
---
# Communication Search Parameters

<a id="based-on"></a>

## based-on
**Description:** Request fulfilled by this communication

**Type:** reference

**Expression:** Communication.basedOn

**Path:** Communication.basedOn

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-based-on


<a id="category"></a>

## category
**Description:** Message category

**Type:** token

**Expression:** Communication.category

**Path:** Communication.category

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-category


<a id="encounter"></a>

## encounter
**Description:** The Encounter during which this Communication was created

**Type:** reference

**Expression:** Communication.encounter

**Path:** Communication.encounter

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-encounter


<a id="identifier"></a>

## identifier
**Description:** Unique identifier

**Type:** token

**Expression:** Communication.identifier

**Path:** Communication.identifier

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-identifier


<a id="medium"></a>

## medium
**Description:** A channel of communication

**Type:** token

**Expression:** Communication.medium

**Path:** Communication.medium

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-medium


<a id="part-of"></a>

## part-of
**Description:** Part of referenced event (e.g. Communication, Procedure)

**Type:** reference

**Expression:** Communication.partOf

**Path:** Communication.partOf

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-part-of


<a id="patient"></a>

## patient
**Description:** Focus of message

**Type:** reference

**Expression:** Communication.subject.where(resolve() is Patient)

**Path:** Communication.subject

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-patient


<a id="received"></a>

## received
**Description:** When received

**Type:** date

**Expression:** Communication.received

**Path:** Communication.received

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-received


<a id="recipient"></a>

## recipient
**Description:** Who the information is shared with

**Type:** reference

**Expression:** Communication.recipient

**Path:** Communication.recipient

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-recipient


<a id="sender"></a>

## sender
**Description:** Who shares the information

**Type:** reference

**Expression:** Communication.sender

**Path:** Communication.sender

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-sender


<a id="sent"></a>

## sent
**Description:** When sent

**Type:** date

**Expression:** Communication.sent

**Path:** Communication.sent

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-sent


<a id="status"></a>

## status
**Description:** preparation | in-progress | not-done | on-hold | stopped | completed | entered-in-error | unknown

**Type:** token

**Expression:** Communication.status

**Path:** Communication.status

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-status


<a id="subject"></a>

## subject
**Description:** Focus of message

**Type:** reference

**Expression:** Communication.subject

**Path:** Communication.subject

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-subject


<a id="topic"></a>

## topic
**Description:** Description of the purpose/content

**Type:** token

**Expression:** Communication.topic

**Path:** Communication.topic

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-topic


<a id="reason-code"></a>

## reason-code
**Description:** Indication for the message

**Type:** token

**Expression:** Communication.reason.concept

**Path:** Communication.reason.concept

**Standards Status:** normative


<a id="reason-reference"></a>

## reason-reference
**Description:** Indication for the message

**Type:** reference

**Expression:** Communication.reason.reference

**Path:** Communication.reason.reference

**Standards Status:** normative


<a id="in-response-to"></a>

## in-response-to
**Description:** Reply to

**Type:** reference

**Expression:** Communication.inResponseTo

**Path:** Communication.inResponseTo

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Communication-in-response-to