Every fall, roughly 60 million Medicare enrollees get buried in a pile of glossy booklets promising dental, vision, gym memberships, and a $0 monthly premium.
Private Medicare Advantage plans now cover more than half of all eligible seniors.
They cost the government more per person than traditional Medicare, according to decades of research, yet they routinely post double-digit profit margins.
That math has to come from somewhere, and it isn't coming from the plan's shareholders.
Original Medicare plus a Medigap supplement costs more upfront — often $150 to $250 a month on top of the Part B premium.
In exchange, you can see almost any doctor in the country, and your out-of-pocket exposure is capped tightly.
A Medicare Advantage plan flips that: low or zero premium, but you stay inside a network, and the plan decides what it will approve.
The approval part is where the real money gets made.
A 2023 federal review found that Advantage plans denied 3.4 million prior-authorization requests in a single year.
About 80 percent of the denials that were appealed got overturned.
The denials weren't medically sound — they were volume plays, and most people never appeal.
Then there's the "extra benefits" marketing.
That gym membership and dental card look generous until you read the fine print.
Dental caps frequently sit around $1,000 to $1,500 a year, which covers a cleaning and part of a crown.
Vision allowances often top out at a pair of frames from a narrow list.
These perks are funded by the same dollars that would have gone toward a broader provider network.
The supplement crowd isn't off the hook either.
Medigap premiums rise with age in most states, and the increases compound.
Someone who locks in a Plan G at 65 might be paying double by 80.
It's a real budgeting problem for anyone on a fixed income.
It depends less on the brochure and more on three things: whether your doctors take the Advantage network, whether you have a chronic condition that invites prior-authorization fights, and whether you can absorb a premium that climbs for 20 years.
People who travel, snowbird, or see specialists usually regret the cheap plan.
People who are healthy, stay local, and need every dollar now often do fine.
In most states, Medigap insurers can medically underwrite you after your initial enrollment window.
Develop a heart condition or diabetes on an Advantage plan, and you may be locked out of the supplement you now want.
That's the trap nobody advertises during open enrollment.
The same agents often earn higher commissions on Advantage plans, and the TV ads with celebrity spokespeople are paid placements, not public service.
The Centers for Medicare & Medicaid Services runs a free, unbiased comparison at medicare.gov — no commission, no sales script.
Use it before you sign anything, and check whether your specific doctors and hospitals are in-network before the deadline, not after.
The bottom line: neither option is a scam, but the marketing around both is.
Cheap premiums aren't savings — they're a transfer of risk from the insurer back onto you.
Final Thoughts
If you can afford the supplement and expect to need care, the boring, expensive choice is often the one that keeps you out of bankruptcy.