> ## 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. # Procedure > An action that is or was performed on or for a patient. This can be a physical intervention like an operation, or less invasive like long term services, counseling, or hypnotherapy. ## Properties | Name | Required | Type | Description | | --------------------- | -------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- | | identifier | No | [Identifier](/medical-api/fhir/data-types/identifier)\[] | External Identifiers for this procedure | | instantiatesCanonical | No | canonical\[] | Instantiates FHIR protocol or definition | | instantiatesUri | No | uri\[] | Instantiates external protocol or definition | | basedOn | No | Reference\<[CarePlan](/medical-api/fhir/resources/careplan) / [ServiceRequest](/medical-api/fhir/resources/servicerequest)>\[] | A request for this procedure | | partOf | No | Reference\<[Procedure](/medical-api/fhir/resources/procedure) / [Observation](/medical-api/fhir/resources/observation) / [MedicationAdministration](/medical-api/fhir/resources/medicationadministration)>\[] | Part of referenced event | | 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) | Classification of the procedure | | code | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Identification of the procedure | | subject | Yes | Reference\<[Patient](/medical-api/fhir/resources/patient) / [Group](/medical-api/fhir/resources/group)> | Who the procedure was performed on | | encounter | No | Reference\<[Encounter](/medical-api/fhir/resources/encounter)> | Encounter created as part of | | performed\[x] | No | dateTime, [Period](/medical-api/fhir/data-types/period), string, [Age](/medical-api/fhir/data-types/age), [Range](/medical-api/fhir/data-types/range) | When the procedure was performed | | recorder | No | Reference\<[Patient](/medical-api/fhir/resources/patient) / [RelatedPerson](/medical-api/fhir/resources/relatedperson) / [Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole)> | Who recorded the procedure | | asserter | No | Reference\<[Patient](/medical-api/fhir/resources/patient) / [RelatedPerson](/medical-api/fhir/resources/relatedperson) / [Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole)> | Person who asserts this procedure | | performer | No | ProcedurePerformer | The people who performed the procedure | | - 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 | | - function | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Type of performance | | - actor | Yes | Reference\<[Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [Organization](/medical-api/fhir/resources/organization) / [Patient](/medical-api/fhir/resources/patient) / [RelatedPerson](/medical-api/fhir/resources/relatedperson) / [Device](/medical-api/fhir/resources/device)> | The reference to the practitioner | | - onBehalfOf | No | Reference\<[Organization](/medical-api/fhir/resources/organization)> | Organization the device or practitioner was acting for | | location | No | Reference\<[Location](/medical-api/fhir/resources/location)> | Where the procedure happened | | reasonCode | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Coded reason procedure performed | | reasonReference | No | Reference\<[Condition](/medical-api/fhir/resources/condition) / [Observation](/medical-api/fhir/resources/observation) / [Procedure](/medical-api/fhir/resources/procedure) / [DiagnosticReport](/medical-api/fhir/resources/diagnosticreport) / [DocumentReference](/medical-api/fhir/resources/documentreference)>\[] | The justification that the procedure was performed | | bodySite | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Target body sites | | outcome | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | The result of procedure | | report | No | Reference\<[DiagnosticReport](/medical-api/fhir/resources/diagnosticreport) / [DocumentReference](/medical-api/fhir/resources/documentreference) / [Composition](/medical-api/fhir/resources/composition)>\[] | Any report resulting from the procedure | | complication | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Complication following the procedure | | complicationDetail | No | Reference\<[Condition](/medical-api/fhir/resources/condition)>\[] | A condition that is a result of the procedure | | followUp | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Instructions for follow up | | note | No | [Annotation](/medical-api/fhir/data-types/annotation)\[] | Additional information about the procedure | | focalDevice | No | ProcedureFocalDevice | Manipulated, implanted, or removed device | | - 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 | | - action | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Kind of change to device | | - manipulated | Yes | Reference\<[Device](/medical-api/fhir/resources/device)> | Device that was changed | | usedReference | No | Reference\<[Device](/medical-api/fhir/resources/device) / [Medication](/medical-api/fhir/resources/medication) / [Substance](/medical-api/fhir/resources/substance)>\[] | Items used during procedure | | usedCode | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Coded items used during the procedure | ## Search Parameters | Name | Type | Description | Expression | | ---------------------- | --------- | ------------------------------------------------------------------------------------------------- | ------------------------------- | | code | token | A code to identify a procedure | Procedure.code | | date | date | When the procedure was performed | Procedure.performed | | identifier | token | A unique identifier for a procedure | Procedure.identifier | | patient | reference | Search by subject - a patient | Procedure.subject | | encounter | reference | Encounter created as part of | Procedure.encounter | | based-on | reference | A request for this procedure | Procedure.basedOn | | category | token | Classification of the procedure | Procedure.category | | instantiates-canonical | reference | Instantiates FHIR protocol or definition | Procedure.instantiatesCanonical | | instantiates-uri | uri | Instantiates external protocol or definition | Procedure.instantiatesUri | | location | reference | Where the procedure happened | Procedure.location | | part-of | reference | Part of referenced event | Procedure.partOf | | performer | reference | The reference to the practitioner | Procedure.performer.actor | | reason-code | token | Coded reason procedure performed | Procedure.reasonCode | | reason-reference | reference | The justification that the procedure was performed | Procedure.reasonReference | | status | token | preparation / in-progress / not-done / on-hold / stopped / completed / entered-in-error / unknown | Procedure.status | | subject | reference | Search by subject | Procedure.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 [Procedure](https://www.hl7.org/fhir/StructureDefinition/Procedure).