> ## 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.

# Flag

> Prospective warnings of potential issues when providing care to the patient.

## Properties

| Name | Required | Type | Description |
| - | - | - | - |
| identifier | No | [Identifier](https://docs.metriport.com/medical-api/fhir/data-types/identifier.md)\[] | Business identifier |
| status | Yes | code | active / inactive / entered-in-error |
| category | No | [CodeableConcept](https://docs.metriport.com/medical-api/fhir/data-types/codeableconcept.md)\[] | Clinical, administrative, etc. |
| code | Yes | [CodeableConcept](https://docs.metriport.com/medical-api/fhir/data-types/codeableconcept.md) | Coded or textual message to display to user |
| subject | Yes | Reference\<[Patient](https://docs.metriport.com/medical-api/fhir/resources/patient.md) / [Location](https://docs.metriport.com/medical-api/fhir/resources/location.md) / [Group](https://docs.metriport.com/medical-api/fhir/resources/group) / [Organization](https://docs.metriport.com/medical-api/fhir/resources/organization.md) / [Practitioner](https://docs.metriport.com/medical-api/fhir/resources/practitioner.md) / [PlanDefinition](https://docs.metriport.com/medical-api/fhir/resources/plandefinition) / [Medication](https://docs.metriport.com/medical-api/fhir/resources/medication.md) / [Procedure](https://docs.metriport.com/medical-api/fhir/resources/procedure.md)> | Who/What is flag about? |
| period | No | [Period](https://docs.metriport.com/medical-api/fhir/data-types/period.md) | Time period when flag is active |
| encounter | No | Reference\<[Encounter](https://docs.metriport.com/medical-api/fhir/resources/encounter.md)> | Alert relevant during encounter |
| author | No | Reference\<[Device](https://docs.metriport.com/medical-api/fhir/resources/device.md) / [Organization](https://docs.metriport.com/medical-api/fhir/resources/organization.md) / [Patient](https://docs.metriport.com/medical-api/fhir/resources/patient.md) / [Practitioner](https://docs.metriport.com/medical-api/fhir/resources/practitioner.md) / [PractitionerRole](https://docs.metriport.com/medical-api/fhir/resources/practitionerrole.md)> | Flag creator |

## Search Parameters

| Name | Type | Description | Expression |
| - | - | - | - |
| date | date | Time period when flag is active | Flag.period |
| patient | reference | The identity of a subject to list flags for | Flag.subject |
| encounter | reference | Alert relevant during encounter | Flag.encounter |
| author | reference | Flag creator | Flag.author |
| identifier | token | Business identifier | Flag.identifier |
| subject | reference | The identity of a subject to list flags for | Flag.subject |

## Inherited Properties

| Name | Required | Type | Description |
| - | - | - | - |
| id | No | string | Logical id of this artifact |
| meta | No | [Meta](https://docs.metriport.com/medical-api/fhir/data-types/meta.md) | 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](https://docs.metriport.com/medical-api/fhir/data-types/narrative.md) | Text summary of the resource, for human interpretation |
| contained | No | Resource\[] | Contained, inline Resources |
| extension | No | [Extension](https://docs.metriport.com/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations |
| modifierExtension | No | [Extension](https://docs.metriport.com/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored |

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


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