The real differences between the two, focusing on prior authorization, network restrictions, and what happens when you get seriously ill. This is what the dental and gym membership ads don't tell you.
Nearly all Medicare Advantage enrollees — 99% according to KFF — are in plans that require prior authorization for at least some services, including inpatient hospital stays, skilled nursing facility care, home health services, durable medical equipment, and specialty drugs. In Original Medicare, prior authorization is required for only a narrow set of services.
The difference between the two systems becomes most significant when a patient becomes seriously ill. A Medicare Advantage plan that seemed adequate for routine care may become a significant obstacle when you need multiple specialists, extended hospital stays, or complex post-acute rehabilitation. Prior authorization requirements, network gaps, and utilization management tools like nH Predict can all delay or limit access to care at exactly the moment you need it most.
Switching from Medicare Advantage back to Original Medicare is possible but has complications. If you want to add a Medigap policy after being on Medicare Advantage, you may not have a guaranteed issue right — meaning the Medigap insurer can deny you or charge higher premiums based on your health status, depending on your state. Timing matters. Consider switching early in your Medicare enrollment, before a significant health event.
