Hearing aid exams and fittings aren't covered under Medicare Part B, but your plan often covers diagnostic tests to evaluate hearing loss related to balance or fall risk. Medicare does not cover most dental services, but it does cover some. Medicare Part B covers an ambulance ride or other ground transportation to the nearest appropriate medical facility if traveling in any other vehicle could endanger your health, and you need medically necessary services in a skilled nursing facility, hospital, or critical care hospital.