A type of Medicare Advantage Plan (Part C) in which you can generally go to any doctor or hospital you could go to if you had Original Medicare, if the doctor or hospital agrees to treat you. The plan determines how much it will pay doctors and hospitals, and how much you must pay when you get care. A Private Fee-For-Service Plan is very different than Original Medicare, and you must follow the plan rules carefully when you go for health care services. When you’re in a Private Fee-For-Service Plan, you may pay more or less for Medicare-covered benefits than in Original Medicare.