Home › Blog › Medicare Advantage vs. Medigap
Medicare · 2026 GuideMedicare Advantage vs. Medicare Supplement (Medigap): How to Actually Choose
Both start with Original Medicare. After that, they work almost nothing alike — different costs, different networks, different rules about switching later. Here's the honest breakdown before Open Enrollment (October 15 – December 7).
Every year, millions of people turning 65 — and millions more already on Medicare — face the same fork in the road: Medicare Advantage or Medigap? The names sound similar. The marketing mail makes them sound almost interchangeable. They are not. One rebuilds your coverage inside a private-insurer network; the other pays alongside Original Medicare with no network at all. Picking the wrong one isn't usually a disaster, but it can lock you into higher costs or a narrower doctor list for a long time. Here's how the two actually compare for 2026.
- Medigap pays alongside Original Medicare with no networks — but premiums run $110–$200+/month and after your first 6 months on Part B, most states require medical underwriting to enroll or switch.
- Medicare Advantage often has a $0 premium and bundles dental/vision/hearing — but you're generally limited to an in-network plan, and referrals or prior authorization can apply.
- Switching from Medicare Advantage back to Medigap later isn't guaranteed in most states unless you act within specific windows.
- Neither choice is "better" — it depends on how you use healthcare, where you travel, and how much cost certainty you want.
They Start From the Same Place, Then Split
Both options require you to already have Original Medicare — Part A (hospital) and Part B (medical). From there, they solve the same problem — the 20% Original Medicare doesn't cover, plus deductibles and copays — in opposite ways.
Medigap (Medicare Supplement) is an add-on policy from a private insurer that pays some or all of what Original Medicare leaves behind. You keep Original Medicare as your primary coverage and can see any doctor or hospital in the country that accepts Medicare — no referrals, no network.
Medicare Advantage (Part C) replaces Original Medicare's structure entirely. A private insurer takes over your Medicare benefits and delivers them through its own plan — usually with a network, often with a $0 premium, and almost always bundled with a Part D drug plan and extras like dental, vision, and hearing.
Medigap: Predictable Cost, Zero Network
Medigap plans are standardized by letter (A, F, G, N, and others) — every insurer's Plan G covers the exact same benefits, so the only real differences between companies are price, customer service, and rate-increase history. Plan G is the most popular choice for new enrollees, since Plan F closed to anyone who became Medicare-eligible on or after January 1, 2020.
Here's what makes Medigap different day-to-day:
- No network. Any provider that accepts Medicare accepts your Medigap plan — including out of state, which matters if you snowbird or travel often.
- No referrals or prior authorization from the Medigap insurer for Medicare-covered care.
- You pay two premiums — the Part B premium ($202.90/month in 2026) plus your Medigap premium — and typically add a standalone Part D drug plan separately.
- Underwriting after your window closes. Your one guaranteed-issue shot is the Medigap Open Enrollment Period — the 6 months starting the month you're 65 and enrolled in Part B. Miss it, and insurers can ask health questions or decline you in most states (a handful of states offer year-round or birthday-rule guaranteed issue).
People who travel frequently, split time between states, have a specialist they don't want to risk losing to a network change, or simply want to never think about a bill again.
Medicare Advantage: Lower Upfront Cost, More Structure
Medicare Advantage plans bundle hospital, medical, usually drug coverage, and often dental, vision, hearing, and even a fitness benefit into one plan and one card. Many plans carry a $0 monthly premium — you still pay the standard Part B premium, but nothing extra to the plan itself in a lot of cases.
In exchange, MA plans come with more moving parts:
- Networks (HMO or PPO). HMOs generally require you to stay in-network except for emergencies; PPOs allow out-of-network care at a higher cost.
- Referrals and prior authorization are common for specialists, imaging, and certain procedures — an extra step Medigap doesn't require.
- An annual out-of-pocket maximum (Medicare Advantage plans are required to have one; Original Medicare and Medigap don't need one because Medigap already covers most of the gap).
- Guaranteed issue every year. Unlike Medigap, MA plans can't turn you down or charge more for pre-existing conditions during your enrollment window.
People who are healthy or stable, want built-in dental/vision/hearing, want to keep monthly costs low, and are comfortable using a plan's network most of the time.
Switching later is easier one direction than the other
Straightforward
You can drop a Medigap policy and enroll in Medicare Advantage during any Annual Enrollment Period (Oct 15 – Dec 7) without health questions.
Not guaranteed
Switching back to Medigap after leaving it usually requires passing medical underwriting in most states — insurers can decline you or charge more based on health history.
Your safety net
If it's your first time trying Medicare Advantage, federal law gives you a 12-month trial right — you can return to Original Medicare and get a Medigap policy with guaranteed issue within that first year.
If your MA plan leaves your area
If your Medicare Advantage plan is discontinued or exits your service area, you get a guaranteed-issue right to buy a Medigap policy without underwriting — no matter how long you've been on MA.
Medicare Advantage or Medigap: Which Is Better?
There's no universally "better" plan — only the plan that fits how you actually live and how much financial certainty you want to pay for. If you value never getting a surprise bill and want the freedom to see any provider anywhere, Medigap's higher premium buys that peace of mind. If you'd rather keep monthly costs low, want dental and vision built in, and are comfortable working within a network, Medicare Advantage can deliver strong value — as long as you read the Evidence of Coverage, not just the brochure.
The one mistake worth avoiding: picking based on the mailer with the biggest "$0 premium" headline, or the Medigap quote with the lowest number, without checking whether your own doctors and prescriptions actually work well under that specific plan. Timing also matters — the safest window to enroll in Medigap without health questions is the 6 months right after you turn 65 and enroll in Part B, so it's worth deciding before that window closes even if you ultimately choose Medicare Advantage.
Want help comparing your specific options? See our guides on what changes for the 2027 Annual Enrollment Period, how to read your ANOC letter, or visit the Medicare education center.
Common questions
What is the difference between Medicare Advantage and Medicare Supplement?
Medicare Supplement (Medigap) pays alongside Original Medicare with no network — you can see any provider in the country that accepts Medicare. Medicare Advantage (Part C) replaces Original Medicare's structure entirely: a private insurer delivers your benefits through its own plan, usually with a network, often at a $0 premium, and typically bundled with a Part D drug plan and extras like dental, vision and hearing.
Is Medigap the same thing as Medicare Supplement?
Yes. Medigap and Medicare Supplement are two names for the same type of policy — a private add-on that pays some or all of what Original Medicare leaves behind. Plans are standardized by letter, so every insurer's Plan G covers identical benefits, and the differences between companies come down to price, customer service and rate-increase history.
Which is better, Medicare Advantage or Medigap?
Neither is better on its own. It depends on how you use healthcare, where you travel, and how much cost certainty you want. Medigap trades a higher monthly premium for predictable costs and no network. Medicare Advantage trades network limits, referrals and prior authorization for a much lower upfront premium and bundled extras.
How much does a Medigap plan cost per month?
A Plan G premium for a 65-year-old typically runs about $110 to $200 or more per month, varying by state and ZIP code. Medicare Advantage premiums are often $0 — though you still pay the standard Part B premium either way.
Can I switch from Medicare Advantage back to Medigap later?
Not automatically. In most states, switching back to Medigap is not guaranteed unless you act within a specific window. After your first six months on Part B, most states require medical underwriting to enroll in or change a Medigap policy — which is why the initial choice matters more than it first appears.
Not sure which one fits
your situation?
Our licensed agents can walk through your doctors, prescriptions, budget, and travel habits — and show you real Medicare Advantage and Medigap quotes side by side before you decide.
Free consultation · No obligation · Licensed in multiple states