@type t() :: %HL7v2.Segment.IIM{
  extra_fields: term(),
  inventory_expiration_date: term(),
  inventory_location: term(),
  inventory_lot_number: term(),
  inventory_manufacturer_name: term(),
  inventory_on_hand_date: term(),
  inventory_on_hand_quantity: term(),
  inventory_on_hand_quantity_unit: term(),
  inventory_received_date: term(),
  inventory_received_item_cost: term(),
  inventory_received_quantity: term(),
  inventory_received_quantity_unit: term(),
  primary_key_value: term(),
  procedure_code: term(),
  procedure_code_modifier: term(),
  service_item_code: term()
}