> ## 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.

# Group

> Represents a defined collection of entities that may be discussed or acted upon collectively but which are not expected to act collectively, and are not formally or legally recognized; i.e. a collection of entities that isn't an Organization.

## Properties

| Name | Required | Type | Description |
| - | - | - | - |
| identifier | No | [Identifier](/medical-api/fhir/data-types/identifier)\[] | Unique id |
| active | No | boolean | Whether this group's record is in active use |
| type | Yes | code | person / animal / practitioner / device / medication / substance |
| actual | Yes | boolean | Descriptive or actual |
| code | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Kind of Group members |
| name | No | string | Label for Group |
| quantity | No | unsignedInt | Number of members |
| managingEntity | No | Reference\<[Organization](/medical-api/fhir/resources/organization) / [RelatedPerson](/medical-api/fhir/resources/relatedperson) / [Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole)> | Entity that is the custodian of the Group's definition |
| characteristic | No | GroupCharacteristic | Include / Exclude group members by Trait |
| - 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 |
| - code | Yes | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Kind of characteristic |
| - value\[x] | Yes | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept), boolean, [Quantity](/medical-api/fhir/data-types/quantity), [Range](/medical-api/fhir/data-types/range), Reference\<> | Value held by characteristic |
| - exclude | Yes | boolean | Group includes or excludes |
| - period | No | [Period](/medical-api/fhir/data-types/period) | Period over which characteristic is tested |
| member | No | GroupMember | Who or what is in group |
| - 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 |
| - entity | Yes | Reference\<[Patient](/medical-api/fhir/resources/patient) / [Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [Device](/medical-api/fhir/resources/device) / [Medication](/medical-api/fhir/resources/medication) / [Substance](/medical-api/fhir/resources/substance) / [Group](/medical-api/fhir/resources/group)> | Reference to the group member |
| - period | No | [Period](/medical-api/fhir/data-types/period) | Period member belonged to the group |
| - inactive | No | boolean | If member is no longer in group |

## Search Parameters

| Name | Type | Description | Expression |
| - | - | - | - |
| actual | token | Descriptive or actual | Group.actual |
| characteristic | token | Kind of characteristic | Group.characteristic.code |
| code | token | The kind of resources contained | Group.code |
| exclude | token | Group includes or excludes | Group.characteristic.exclude |
| identifier | token | Unique id | Group.identifier |
| managing-entity | reference | Entity that is the custodian of the Group's definition | Group.managingEntity |
| member | reference | Reference to the group member | Group.member.entity |
| type | token | The type of resources the group contains | Group.type |
| value | token | Value held by characteristic | Group.characteristic.value |
| characteristic-value | composite | A composite of both characteristic and value | Group.characteristic |

## 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 [Group](https://www.hl7.org/fhir/StructureDefinition/Group).


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