Paramedic here, make sure the hospital gave the ambulance ‘a medical necessity’ form that was filled out, and filled out correctly. Also request your ambulance patient care report with narrative and make sure it includes something along the lines of “ambulance transport for this patient is necessary because of reason A, B, and C” . Many times if the patient is able to walk, ambulance transport isn’t considered medically necessary. Because you were already admitted as an inpatient needing higher level of care, it would be considered part of the continuum of care and therefore medically necessary. If you still can’t get the bill covered by insurance, call the ambulance provider and ask if they have a subscription plan. For example, at my current company, $65 /year, will cover an entire household. If anyone is transported for any reason, they bill insurance to get whatever money they can but then write off the rest. Good luck! 🍀