@type t() :: %HL7v2.Segment.IAM{
  action_reason: term(),
  alert_device_code: term(),
  allergen_code_mnemonic_description: term(),
  allergen_group_code_mnemonic_description: term(),
  allergen_type_code: term(),
  allergy_action_code: term(),
  allergy_clinical_status_code: term(),
  allergy_reaction_code: term(),
  allergy_severity_code: term(),
  allergy_unique_identifier: term(),
  extra_fields: term(),
  onset_date: term(),
  onset_date_text: term(),
  relationship_to_patient_code: term(),
  reported_by: term(),
  reported_date_time: term(),
  sensitivity_to_causative_agent_code: term(),
  set_id: term(),
  statused_at_date_time: term(),
  statused_by_organization: term(),
  statused_by_person: term()
}