Not all ambulance service is covered by Medicare or Medicaid. In order to be covered, the ambulance service must be necessary and reasonable. The patient must also meet medical necessity criteria.
Medical necessity is established when the patient's condition at the time of transport is such that the use of any other method of transportation would be contraindicated. In other words, no other type of transportation could have been used without endangering the patient's health. If the patient could have been transported safely by any other means, e.g., by wheelchair, van, car, taxi, etc., then medical necessity does not exist. It does not make a difference whether the other type of transportation is actually available in the locality at the time of service.