Medicare Advantage vs Medigap
If an all-in-one Medicare Advantage plan has caught your eye — low premium, drugs and extras bundled together — it’s worth understanding exactly how it compares to the other route: keeping Original Medicare and adding a Medigap supplement. Both are legitimate, and neither is universally “better.” We offer both, so here’s a straight, side-by-side look to help you choose.
The fundamental difference
Everyone begins with Original Medicare (Parts A & B). The decision is simply how you complete it. Medicare Advantage replaces Original Medicare with a single bundled plan; Medigap keeps Original Medicare and adds a supplement that pays its gaps. You choose one path — not both.
One private plan takes over for Original Medicare and bundles everything together — usually including prescription drugs and extras like dental and vision — typically through a network, often for a low monthly premium.
You keep Original Medicare and add a private Medigap policy that pays its out-of-pocket gaps, plus a separate Part D drug plan. No networks — any doctor nationwide who accepts Medicare works.
Side by side
The two paths across the dimensions that matter most. Costs are shown relative to each other, since exact amounts vary by plan, carrier, and area.
| How they compare | Medicare AdvantagePart C | MedigapOriginal + Supplement |
|---|---|---|
| How it works | Replaces Original Medicare with one private plan | Adds to Original Medicare and pays its gaps |
| Monthly premium | Often low, sometimes none (plus your Part B premium) | Higher (plus your Part B premium) |
| Prescription drugs | Usually built into the plan | A separate Part D plan you choose |
| Dental, vision, hearing | Often included | Added through separate coverage |
| Doctors & hospitals | Usually a network (HMO or PPO) | Any that accept Medicare, nationwide |
| Referrals | May be required for specialists | Not needed |
| Prior authorization | More common for certain services | Rarely required |
| Costs when you get care | Copays as you use services | Very little — the plan pays the gaps |
| Yearly out-of-pocket cap | Built-in maximum | Effectively handled by the supplement |
| Travel within the U.S. | Best within the plan’s service area | Works anywhere Medicare is accepted |
| Cost predictability | Varies with how much care you use | Very high — few surprises |
| Best for | Low premium & bundled extras | Freedom & predictable costs |
How each one actually works
A closer look at the day-to-day of each path — what happens when you go to the doctor, fill a prescription, or travel.
Medicare Advantage (Part C)
At the doctor
You use the plan’s network and show your Advantage card. Staying in-network keeps your costs lowest; some plans require referrals to see specialists.
When you get care
You pay a copay or coinsurance as you go, up to the plan’s yearly out-of-pocket maximum — after which the plan covers 100%.
Drugs & extras
Prescriptions are usually built in, and many plans add dental, vision, hearing, and fitness perks in one package.
Medigap (Original Medicare + Supplement)
At the doctor
Show your Medicare card and supplement card. Any provider nationwide that accepts Medicare is in — there’s no network to check.
When bills come
Medicare pays its share, then your supplement pays most or all of what’s left. You usually owe little to nothing.
Drugs & extras
You add a separate Part D plan for prescriptions, and can add dental or vision coverage separately if you want it.
Strengths and watch-outs of each
No sugar-coating — here’s what each path does well, and where it asks you to compromise.
- Low or even no plan premium in many areas
- Drugs and extras bundled in — dental, vision, hearing, fitness
- A built-in yearly out-of-pocket maximum
- One card, one plan — simple and all-in-one
- Networks and possible referrals
- More prior authorization; you pay copays as you go
- Coverage is tied to the plan’s area, and works best there
- Any doctor nationwide that accepts Medicare — no networks
- Very predictable costs — you rarely see a bill
- No referrals, and prior authorization is rare
- Great for travel and splitting time between states
- Higher monthly premium
- Drugs and extras are added separately
- Switching later may require health underwriting
Who tends to pick what
A few common situations and the path they usually point toward. Yours may differ — the only way to be sure is to look at your specifics.
“I want the lowest monthly premium.”
Medicare Advantage — often low or no plan premium“I want to keep any doctor I choose.”
Medigap — no networks, nationwide access“I want dental, vision & hearing bundled.”
Medicare Advantage — extras are often included“I travel or split time between states.”
Medigap — works anywhere Medicare is accepted“I’m healthy and want an all-in-one plan.”
Medicare Advantage — simple, bundled, budget-friendly“I want the most predictable costs possible.”
Medigap — the plan pays the gaps, few surprisesBoth paths are legitimate — more than half of Medicare beneficiaries now choose Advantage for its low premium and bundled benefits, while many others prefer Medigap’s freedom and predictability. Because we offer both, we have no reason to steer you one way or the other. The right choice depends on your doctors, prescriptions, health, budget, and how you like to use care — and we’ll walk through all of it with you, free.
Explore next
One decision, made easy — with someone on your side.
Tell us about your doctors, prescriptions, budget, and how you like to get care, and we’ll compare both paths honestly and recommend the one that genuinely fits you. We offer Medicare Advantage and Medigap, so our only goal is your best fit. Free, unbiased, no pressure.
May River Medicare Insurance is an independent agency and is not affiliated with or endorsed by the U.S. government, the federal Medicare program, or CMS. Medicare Advantage and Medigap are different types of coverage and cannot be used together. Plan availability, benefits, premiums, networks, and out-of-pocket costs vary by ZIP code and carrier, and you must continue to pay your Medicare Part B premium. Comparisons here are general and for education only. For a complete list of your options, contact Medicare.gov or 1-800-MEDICARE.