Original Medicare vs. Medicare Advantage: How to Choose
Original Medicare (Part A + Part B) is the federal program that lets you use any doctor or hospital in the country that accepts Medicare, with no networks and no referrals — but it has no out-of-pocket maximum, so most people add a Medigap policy and a Part D drug plan. Medicare Advantage (Part C) is private coverage that bundles Parts A, B, and usually D, often adds dental/vision/hearing, and caps your yearly out-of-pocket costs — but it uses provider networks and may require referrals and prior authorization.
Side-by-side comparison
| Feature | Original Medicare | Medicare Advantage |
|---|---|---|
| Doctor choice | Any provider that accepts Medicare, nationwide | Usually network-based (HMO/PPO) |
| Referrals | Not required | Often required (HMO) |
| Out-of-pocket max | None on its own | Yes — annual cap on in-network costs |
| Drug coverage | Add a separate Part D plan | Usually included |
| Extra benefits | No | Often dental, vision, hearing, fitness |
| Supplement allowed | Yes — Medigap can be added | No — cannot use Medigap |
When Original Medicare + Medigap makes sense
- You want to keep any doctor nationwide without network restrictions.
- You travel often or split time between states.
- You prefer predictable costs and are willing to pay a monthly Medigap premium for them.
When Medicare Advantage makes sense
- You want lower (sometimes $0) monthly premiums and an all-in-one plan.
- You value extra benefits like dental, vision, or hearing.
- Your preferred doctors are in the plan network and you are comfortable with referrals/prior authorization.
Frequently asked questions
Can I switch from Medicare Advantage back to Original Medicare?
Yes — during the Annual Enrollment Period (Oct 15–Dec 7) or the Medicare Advantage Open Enrollment Period (Jan 1–Mar 31). Note that returning to Original Medicare and buying a Medigap policy later may require medical underwriting depending on your state.
Can I have both Medicare Advantage and Medigap?
No. Medigap only works with Original Medicare. If you enroll in a Medicare Advantage plan, a Medigap policy cannot be used to cover its costs.
Sources
Related guides
Medicare Login Guide is an independent resource and is not affiliated with or endorsed by Medicare, the Centers for Medicare & Medicaid Services, or any government agency. This article is for general information only — confirm current figures and your specific options at medicare.gov or by calling 1-800-MEDICARE.