Medicare's annual enrollment window runs through December 7, and the single biggest decision facing most seniors isn't which drug plan to pick.
It's whether to go with Medicare Advantage or stick with Original Medicare plus a supplement.
Choosing wrong can mean thousands in unexpected costs, and in most states, switching back later gets complicated.
Medicare Advantage plans, run by private insurers, often advertise $0 premiums and extras like dental, vision, and gym memberships.
Deductibles, copays, and out-of-pocket maximums can hit $8,000 or more per year for in-network care, and going out of network can cost even more.
Original Medicare has no annual out-of-pocket cap on its own, which is exactly why people buy a Medigap supplement to fill the gaps.
Depending on your state and age, Plan G premiums can run $100 to $250 a month or more.
But in exchange, you get predictable costs: after the Part B deductible, most covered care is paid at 100%, and you can see any provider in the country who accepts Medicare.
No networks, no referrals, no prior authorization battles for most services.
The math hinges on your health and your tolerance for surprises.
If you're healthy and want to minimize premiums, Medicare Advantage can look attractive.
If you have chronic conditions, travel often, or simply want to know your worst-case number in advance, a supplement often wins once you factor in the copays and the hassle of network restrictions.
There's a timing trap that trips up a lot of people.
When you first enroll in Medicare at 65, you get a one-time guaranteed-issue window to buy any Medigap policy regardless of your health.
Miss it, and in most states insurers can reject you or charge more based on your medical history.
That's why advisors say the decision is easiest to reverse going from Advantage to a supplement early, and hardest later.
A handful of states, including New York and Connecticut, offer more flexibility, but most don't.
Medicare Advantage ads flood the airwaves each fall, and some pitches blur the line between the two products.
The Centers for Medicare & Medicaid Services has tightened rules on misleading ads, but seniors still report confusion over whether a plan is Advantage or a supplement.
Check any plan's star rating and the summary of benefits, not just the commercial.
One practical move: list your doctors and prescriptions, then check whether each Advantage plan in your ZIP code covers them in network.
If your specialists aren't included, the savings evaporate fast.
If you're leaning supplement, price Plan G and Plan N against your budget and confirm you're still inside your guaranteed-issue window.
The takeaway is that the cheaper headline premium usually isn't the cheaper plan.
For many seniors, paying more each month for a supplement buys something valuable: a ceiling on the worst-case year and the freedom to see any doctor.
Final Thoughts
Run your own numbers before December 7, and don't let a flashy ad make the call for you.