Medicare may pay for emergency ambulance transportation in an airplane or helicopter to a hospital if you need immediate and rapid ambulance transportation that ground transportation can’t provide.
In some cases, Medicare may pay for limited, medically necessary, non-emergency ambulance transportation if you have a written order from your doctor stating that ambulance transportation is medically necessary. An example may be a medically necessary ambulance transport to a renal dialysis facility for an End - St age Renal Disease (ESRD) patient.
Medicare will only cover ambulance services to the nearest appropriate medical facility that’s able to give you the care you need.
You pay 20% of the Medicare - approved amount , and the Part B deductible applies.
Source: Medicare & You 2017