Every fall, millions of Americans sit down with a stack of Medicare mail and try to decode two confusing options: Medicare Advantage and Medicare Supplement plans.
The pitch for Medicare Advantage is usually the lower monthly premium — sometimes $0.
What the commercials gloss over is that those plans come with networks, prior authorizations, and copays that can pile up fast when you actually get sick.
Medicare Supplement plans, often called Medigap, work differently.
You keep original Medicare and buy a policy that covers much of what Medicare doesn't.
The catch: the monthly premium is higher, and you still pay the standard Part B premium on top of it.
Advantage plans can change their provider networks and drug formularies every single year.
A plan that covered your cardiologist in 2024 might not in 2025, and you may not find out until the bill shows up.
In most states, you can be denied or charged more based on your health history if you apply after your initial enrollment window.
That window is narrow, and missing it can lock you out of the best-priced coverage for life.
It depends on what you can afford now versus what you might owe later.
Advantage tends to reward healthy people who rarely see doctors.
Medigap tends to protect people with chronic conditions or a fear of surprise bills.
Advantage plans are heavily advertised because insurers get paid by the government per enrollee, which gives them a strong incentive to sign you up.
Medigap agents earn commissions too, so neither side is neutral.
Check whether your doctors and hospitals are in the network.
Add up the worst-case out-of-pocket max, not just the premium.
And read the annual notice of changes — it's boring, but it's where the real story lives.
One more thing: the "free" stuff in Advantage ads — dental, vision, gym memberships — often comes with limits so small they barely cover a cleaning.
It's not a scam, but it's marketing, and marketing is designed to make you stop reading. **The bottom line:** There's no universally right answer, and anyone who tells you otherwise is selling something.
Final Thoughts
Pick based on your health, your budget, and your tolerance for paperwork — not the loudest commercial.