Medicare Advantage vs. Original Medicare
The core differences between Medicare Advantage and Original Medicare: networks, costs, extra benefits, and how to think about which fits your situation.
By Boris Sorto, Healthcare Advocate · Updated August 26, 2026
Original Medicare (Parts A & B) lets you see any provider that accepts Medicare nationwide, with no network restrictions, but generally requires a separate Part D plan and Medigap policy to cover drugs and out-of-pocket costs. Medicare Advantage (Part C) is sold by private insurers, usually bundles drug coverage and extra benefits, but restricts you to a network and may require prior authorization for some services.
Side-by-side comparison
| Original Medicare | Medicare Advantage | |
|---|---|---|
| Provider network | Any provider accepting Medicare, nationwide | Plan’s network (HMO/PPO), usually regional |
| Referrals | Not required | Often required for specialists (HMO plans) |
| Drug coverage | Requires separate Part D plan | Usually included |
| Extra benefits (dental, vision, hearing) | Not included | Often included |
| Out-of-pocket maximum | None; a Medigap policy is how people cap this | Annual out-of-pocket maximum required by law |
| Prior authorization | Rare | Common for many services |
How to decide
If keeping access to any provider nationwide matters most (for example, you travel often or split time between states), Original Medicare paired with a Medigap policy tends to fit better. If lower monthly costs and bundled extra benefits matter more, and you’re comfortable with a network and occasional prior authorization, Medicare Advantage is worth a close look. Neither is universally “better.” It depends on your specific providers, medications, and travel patterns.
Weighing this decision for AEP? A Medicare Annual Checkup walks through it against your specific providers and medications.
Frequently asked questions
Can I switch from Medicare Advantage back to Original Medicare?
Yes, during AEP (Oct 15 – Dec 7) or the Medicare Advantage Open Enrollment Period (Jan 1 – Mar 31) if you’re already in an MA plan. See our AEP guide for the full set of enrollment windows.
Does Original Medicare cover prescription drugs?
Not on its own. You’d add a separate Part D plan. Most Medicare Advantage plans bundle drug coverage in with everything else.
Written by Boris Sorto
Bilingual Healthcare Advocate, formerly with Humana’s Medicare operations. More about Boris →