The ambulance service invoice is a bill sent to a patient by a health care facility requesting payment for costs associated with EMS services. An ambulance provides medical attention in the form of out-of-hospital treatment and transport ranging from basic to advanced life support. Therefore, costs associated with ambulance services can vary greatly. All care provided by EMS will be detailed on the invoice as well as the cost of each service. If the patient is not covered by insurance, they will receive an ambulance service invoice in the mail and must pay the total amount shown on the bill.