Every fall, millions of Americans on Medicare face the same confusing fork in the road: stick with Original Medicare and buy a supplement, or switch to a Medicare Advantage plan.
The difference comes down to how you pay.
Medicare Advantage bundles your hospital, doctor, and often drug coverage into one plan, frequently with a $0 monthly premium and extras like dental or gym memberships.
Medicare supplements, also called Medigap, charge a separate monthly premium on top of your Part B payment but cover most of what Original Medicare leaves behind.
A Medicare Advantage plan might cost nothing upfront but hit you with copays every time you see a specialist, plus an annual out-of-pocket maximum that can run past $8,000 for in-network care.
A Medigap Plan G in many states runs $100 to $200 a month, yet once you pay the Part B deductible, it typically picks up nearly everything else.
The catch with Advantage plans is the network.
You generally stay in-network, and referrals are common.
If you travel often or split time between states, that restriction can bite.
Medigap works with any provider nationwide who accepts Medicare, which is most of them.
There's also a deadline most people learn about too late.
You get a six-month Medigap open enrollment window that starts when you first sign up for Part B at 65.
Miss it, and insurers in most states can ask about your health and charge you more, or turn you down.
Advantage plans, by contrast, let you switch during annual enrollment each fall, but moving back to a supplement later can be expensive or impossible if you have new diagnoses.
With Original Medicare, you buy a standalone drug plan, so you're juggling two premiums and two cards.
It depends on your health, your budget, and how much uncertainty you can stomach.
If you're healthy and want low fixed costs, an Advantage plan can look attractive.
If you want predictable bills and freedom to see any doctor, a supplement often wins over the long run.
Before you decide, check whether your doctors are in the Advantage network, add up the worst-case out-of-pocket max, and price a Medigap plan in your ZIP code.
A licensed counselor at your State Health Insurance Assistance Program can walk you through it for free.
Our take: treat this as a long-term bet, not a one-year bargain.
The lowest premium today can become the highest bill tomorrow if your health changes.
Final Thoughts
Run the math for a bad year, not just a good one, and decide from there.