A retiree who spent 40 years in Michigan sells the house, buys a place in Sarasota, and lands at a Florida orthopedist three weeks after closing. The receptionist runs his card and tells him the Medicare Advantage plan he liked in Grand Rapids is out of network there. Not a higher tier. Not a larger copay. For routine care, the plan he carried south may not work the way it did back home.
This is the mechanic many retirees miss when they choose Medicare Advantage at 65: the plan is a local product tied to a defined service area and provider network. Move out of that service area and you get a Special Enrollment Period to choose a plan in the new location or return to Original Medicare. The Medigap decision has its own clock, and missing it can bring medical underwriting back into the picture.
Why the state line matters
Original Medicare is federal. You can use any doctor or hospital in the country that accepts Medicare. Medicare Advantage plans are private plans paid by CMS to cover you inside a defined service area and network. Move outside that area, and routine specialists, elective surgery, and ongoing chronic-care management may be out of network or not covered, depending on whether the plan is an HMO, PPO, or another model.
Moving permanently out of your plan’s service area triggers a Special Enrollment Period. If you tell your plan before you move, the window begins the month before the move and continues for two full months after. If you tell the plan after you move, the timing can be later. During that window, you can switch to a Medicare Advantage plan in the new area or return to Original Medicare.
The switch-back trap
Returning to Original Medicare is the easy part. Pairing it with a Medigap policy is where Florida can bite. Federal rules can give a guaranteed-issue right to certain Medigap plans when Medicare Advantage coverage ends because you move out of the plan’s service area, but the window is narrow. Apply too late, or seek coverage outside the protected right, and Florida insurers may medically underwrite. A prior stent, diabetes diagnosis, or cancer history can produce a denial or higher premium. Connecticut, Massachusetts, Maine, and New York offer broader continuous or annual Medigap guaranteed-issue protections. Florida does not.
The 2026 numbers that decide the choice
The Original Medicare stack in Florida for 2026 starts with the same federal numbers used nationwide. The standard Part B premium is $202.90 per month, up from $185.00 in 2025, and the Part B annual deductible is $283. The Part A inpatient deductible is $1,736 per benefit period. Hospital days 61 through 90 cost $434 per day in coinsurance, and skilled nursing facility days 21 through 100 cost $217 per day.
A Medigap Plan G covers most of that cost-sharing after the Part B deductible. Without a supplement, Original Medicare has no annual out-of-pocket ceiling for covered Part A and Part B services. That is why the guaranteed-issue window matters: a 70-year-old with medical history who lets the window close in Florida may not be able to buy Plan G at an affordable price, or at all.
Three moves in the next 63 days
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Notify the Advantage plan of the move as early as possible and keep proof of the notice. If you tell the plan before you move, the SEP begins the month before the move and continues for two full months after the move. If you wait until after the move, the timing changes.
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Decide before the window closes whether you want a Florida Advantage plan or Original Medicare plus Medigap. If specialists you rely on are not in a Florida Advantage network, or national provider access matters, Original Medicare plus a Medigap policy may be the better fit. Apply during the guaranteed-issue window if you want the underwriting protection.
- Add a standalone Part D drug plan when you switch to Original Medicare unless you have other creditable drug coverage. Going without creditable Part D coverage can trigger a late-enrollment penalty that grows by 1% of the national base beneficiary premium for each uncovered month and can last as long as you have Part D.
The Advantage plan stayed behind at the state line. The 63-day window is what determines whether the coverage gap follows the retiree south.
The Coverage Decision Moves With You
The Medicare Advantage plan may not travel with the retiree who leaves Michigan for Florida. The real protection is knowing which clock is running: the Special Enrollment Period for a new Advantage or Part D choice, and the Medigap guaranteed-issue window if Original Medicare is the destination. Miss those deadlines, and the health history that did not matter at 65 may matter very much after the move.
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