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

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

## authored-on
**Description:** Search by creation date

**Type:** date

**Expression:** Task.authoredOn

**Path:** Task.authoredOn

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-authored-on


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

## based-on
**Description:** Search by requests this task is based on

**Type:** reference

**Expression:** Task.basedOn

**Path:** Task.basedOn

**Standards Status:** normative

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


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

## business-status
**Description:** Search by business status

**Type:** token

**Expression:** Task.businessStatus

**Path:** Task.businessStatus

**Standards Status:** normative

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


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

## code
**Description:** Search by task code

**Type:** token

**Expression:** Task.code

**Path:** Task.code

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-code


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

## encounter
**Description:** Search by encounter

**Type:** reference

**Expression:** Task.encounter

**Path:** Task.encounter

**Standards Status:** normative

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


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

## focus-reference
**Description:** Search by task focus - reference

**Type:** reference

**Expression:** Task.focus.value.ofType(Reference)

**Path:** Task.focus.valueReference

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-focus-reference


<a id="focus-canonical"></a>

## focus-canonical
**Description:** Search by task focus - canonical

**Type:** uri

**Expression:** Task.focus.value.ofType(canonical)

**Path:** Task.focus.valueCanonical

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-focus-canonical


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

## group-identifier
**Description:** Search by group identifier

**Type:** token

**Expression:** Task.groupIdentifier

**Path:** Task.groupIdentifier

**Standards Status:** normative

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


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

## identifier
**Description:** Search for a task instance by its business identifier

**Type:** token

**Expression:** Task.identifier

**Path:** Task.identifier

**Standards Status:** normative

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


<a id="input"></a>

## input
**Description:** Search by task input

**Type:** reference

**Expression:** Task.input.value.ofType(Reference)

**Path:** Task.input

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-input


<a id="intent"></a>

## intent
**Description:** Search by task intent

**Type:** token

**Expression:** Task.intent

**Path:** Task.intent

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-intent


<a id="modified"></a>

## modified
**Description:** Search by last modification date

**Type:** date

**Expression:** Task.lastModified

**Path:** Task.lastModified

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-modified


<a id="output"></a>

## output
**Description:** Search by task output

**Type:** reference

**Expression:** Task.output.value.ofType(Reference)

**Path:** Task.output

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-output


<a id="owner"></a>

## owner
**Description:** Search by task owner

**Type:** reference

**Expression:** Task.owner

**Path:** Task.owner

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-owner


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

## part-of
**Description:** Search by task this task is part of

**Type:** reference

**Expression:** Task.partOf

**Path:** Task.partOf

**Standards Status:** normative

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


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

## patient
**Description:** Search by patient

**Type:** reference

**Expression:** Task.for.where(resolve() is Patient)

**Path:** Task.for

**Standards Status:** normative

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


<a id="performer"></a>

## performer
**Description:** Search by recommended type of performer (e.g., Requester, Performer, Scheduler).

**Type:** token

**Expression:** Task.requestedPerformer.concept

**Path:** Task.requestedPerformer.concept

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-performer-type


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

## requestedperformer-reference
**Description:** Search by specific requested performer.

**Type:** reference

**Expression:** Task.requestedPerformer.reference

**Path:** Task.requestedPerformer.reference

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-performer-reference


<a id="actor"></a>

## actor
**Description:** Search by specific performer.

**Type:** reference

**Expression:** Task.performer.actor

**Path:** Task.performer.actor

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-performer


<a id="period"></a>

## period
**Description:** Search by period Task is/was underway

**Type:** date

**Expression:** Task.executionPeriod

**Path:** Task.executionPeriod

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-period


<a id="priority"></a>

## priority
**Description:** Search by task priority

**Type:** token

**Expression:** Task.priority

**Path:** Task.priority

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-priority


<a id="requester"></a>

## requester
**Description:** Search by task requester

**Type:** reference

**Expression:** Task.requester

**Path:** Task.requester

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Task-requester


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

## status
**Description:** Search by task status

**Type:** token

**Expression:** Task.status

**Path:** Task.status

**Standards Status:** normative

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


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

## subject
**Description:** Search by subject

**Type:** reference

**Expression:** Task.for

**Path:** Task.for

**Standards Status:** normative

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