> ## 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. # AdverseEvent > Actual or potential/avoided event causing unintended physical injury resulting from or contributed to by medical care, a research study or other healthcare setting factors that requires additional monitoring, treatment, or hospitalization, or that results in death. ## Properties | Name | Required | Type | Description | | --------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | identifier | No | [Identifier](/medical-api/fhir/data-types/identifier) | Business identifier for the event | | actuality | Yes | code | actual / potential | | category | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | product-problem / product-quality / product-use-error / wrong-dose / incorrect-prescribing-information / wrong-technique / wrong-route-of-administration / wrong-rate / wrong-duration / wrong-time / expired-drug / medical-device-use-error / problem-different-manufacturer / unsafe-physical-environment | | event | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Type of the event itself in relation to the subject | | subject | Yes | Reference\<[Patient](/medical-api/fhir/resources/patient) / [Group](/medical-api/fhir/resources/group) / [Practitioner](/medical-api/fhir/resources/practitioner) / [RelatedPerson](/medical-api/fhir/resources/relatedperson)> | Subject impacted by event | | encounter | No | Reference\<[Encounter](/medical-api/fhir/resources/encounter)> | Encounter created as part of | | date | No | dateTime | When the event occurred | | detected | No | dateTime | When the event was detected | | recordedDate | No | dateTime | When the event was recorded | | resultingCondition | No | Reference\<[Condition](/medical-api/fhir/resources/condition)>\[] | Effect on the subject due to this event | | location | No | Reference\<[Location](/medical-api/fhir/resources/location)> | Location where adverse event occurred | | seriousness | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Seriousness of the event | | severity | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | mild / moderate / severe | | outcome | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | resolved / recovering / ongoing / resolvedWithSequelae / fatal / unknown | | recorder | No | Reference\<[Patient](/medical-api/fhir/resources/patient) / [Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [RelatedPerson](/medical-api/fhir/resources/relatedperson)> | Who recorded the adverse event | | contributor | No | Reference\<[Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [Device](/medical-api/fhir/resources/device)>\[] | Who was involved in the adverse event or the potential adverse event | | suspectEntity | No | AdverseEventSuspectEntity | The suspected agent causing the adverse event | | - 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 | | - instance | Yes | Reference\<[Immunization](/medical-api/fhir/resources/immunization) / [Procedure](/medical-api/fhir/resources/procedure) / [Substance](/medical-api/fhir/resources/substance) / [Medication](/medical-api/fhir/resources/medication) / [MedicationAdministration](/medical-api/fhir/resources/medicationadministration) / [MedicationStatement](/medical-api/fhir/resources/medicationstatement) / [Device](/medical-api/fhir/resources/device)> | Refers to the specific entity that caused the adverse event | | - causality | No | AdverseEventSuspectEntityCausality | Information on the possible cause of the event | | - 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 | | - assessment | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Assessment of if the entity caused the event | | - productRelatedness | No | string | AdverseEvent.suspectEntity.causalityProductRelatedness | | - author | No | Reference\<[Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole)> | AdverseEvent.suspectEntity.causalityAuthor | | - method | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | ProbabilityScale / Bayesian / Checklist | | subjectMedicalHistory | No | Reference\<[Condition](/medical-api/fhir/resources/condition) / [Observation](/medical-api/fhir/resources/observation) / [AllergyIntolerance](/medical-api/fhir/resources/allergyintolerance) / [FamilyMemberHistory](/medical-api/fhir/resources/familymemberhistory) / [Immunization](/medical-api/fhir/resources/immunization) / [Procedure](/medical-api/fhir/resources/procedure) / [Media](/medical-api/fhir/resources/media) / [DocumentReference](/medical-api/fhir/resources/documentreference)>\[] | AdverseEvent.subjectMedicalHistory | | referenceDocument | No | Reference\<[DocumentReference](/medical-api/fhir/resources/documentreference)>\[] | AdverseEvent.referenceDocument | | study | No | Reference\<[ResearchStudy](/medical-api/fhir/resources/researchstudy)>\[] | AdverseEvent.study | ## Search Parameters | Name | Type | Description | Expression | | ------------------ | --------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------- | | actuality | token | actual / potential | AdverseEvent.actuality | | category | token | product-problem / product-quality / product-use-error / wrong-dose / incorrect-prescribing-information / wrong-technique / wrong-route-of-administration / wrong-rate / wrong-duration / wrong-time / expired-drug / medical-device-use-error / problem-different-manufacturer / unsafe-physical-environment | AdverseEvent.category | | date | date | When the event occurred | AdverseEvent.date | | event | token | Type of the event itself in relation to the subject | AdverseEvent.event | | location | reference | Location where adverse event occurred | AdverseEvent.location | | recorder | reference | Who recorded the adverse event | AdverseEvent.recorder | | resultingcondition | reference | Effect on the subject due to this event | AdverseEvent.resultingCondition | | seriousness | token | Seriousness of the event | AdverseEvent.seriousness | | severity | token | mild / moderate / severe | AdverseEvent.severity | | study | reference | AdverseEvent.study | AdverseEvent.study | | subject | reference | Subject impacted by event | AdverseEvent.subject | | substance | reference | Refers to the specific entity that caused the adverse event | AdverseEvent.suspectEntity.instance | ## 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 [AdverseEvent](https://www.hl7.org/fhir/StructureDefinition/AdverseEvent).