Private, for-profit plans often require Prior Authorization. Medicare Advantage (MA) plans also often require prior authorization to see specialists, get out-of-network care, get non-emergency hospital care, and more.
Traditional Medicare, historically, has rarely required prior authorization. Enrollees in traditional Medicare Parts A and B can generally see specialists, visit hospitals, get care out of state, and so on, without having to ask Medicare's permission. #MedicarePriorAuthorization