Medicare Supplement Plan G: What Florida Seniors Should Know Before Enrolling

Medicare Supplement Plan G is a private insurance policy, sold alongside Original Medicare, that fills most of the cost-sharing gaps — deductibles, coinsurance, and excess charges — that Medicare itself leaves you to pay.

What Does Medicare Supplement Plan G Actually Cover?

Plan G covers the Part A hospital deductible and coinsurance, the Part B coinsurance after you've met the Part B deductible, the first three pints of blood, Part A hospice care coinsurance, skilled nursing facility care coinsurance, and Part B excess charges — the extra 15% some doctors bill above the Medicare-approved amount.

That last item matters more in Florida than almost anywhere else. Many Florida physicians do not accept Medicare assignment, which means they can charge up to 15% above the approved amount. Original Medicare leaves that excess charge on your plate. Plan G pays it. For Lee County residents, that single difference is often the reason Plan G outranks cheaper plans on a side-by-side comparison.

Here's how the Part B coinsurance works in practice. Per Medicare.gov, for covered Part B services "After the Part B deductible, you pay 20% of the Medicare-approved amount." With Plan G, that 20% is what your supplement pays — so your share drops to zero once the annual deductible is met.

How Is Plan G Different from Plan F and Plan N?

Plan F was the old favorite, but since January 1, 2020, it has been unavailable to people newly eligible for Medicare. If you became eligible before that date, you can still keep or buy Plan F. If you're turning 65 now, Plan G is the closest equivalent: identical benefits, minus the Part B deductible.

Plan N is another option available to new enrollees, alongside the other standardized plans still on the market. It covers the same core benefits but requires copays at the doctor's office and emergency room, and it does not pay Part B excess charges. Some carriers price Plan N noticeably lower than Plan G, which suits people who see doctors infrequently and don't mind small copays. The trade-off is less predictability when a bill arrives.

Takeaway: if predictability matters most to you — especially with Florida doctors who bill excess charges — Plan G is often a strong fit; Plan N and High-Deductible G trade that predictability for lower premiums.

How Much Does Plan G Cost in Florida?

There's no single answer, because every carrier files its own rates with the state, and rating methods differ. Some carriers price by your age at enrollment (issue-age rating), some by your current age (attained-age rating, which can rise over time), and some use community rating. Two people the same age in Fort Myers can receive very different quotes from different carriers for identical Plan G benefits.

What we can tell you from our own files: when XactInsure runs plan comparisons for Lee County clients, the average quoted monthly premium rises steadily across age bands — 65–69, 70–74, 75–79, and 80+. The practical lesson from that pattern is simple: the younger you are when you lock in a Medigap policy, the more carriers tend to have room to quote favorably, and rates can change at each carrier's renewal cycle.

One caution as you shop. Benefits are standardized, so a Plan G from one carrier covers exactly what a Plan G from another covers. The only real difference is price and service. That's why comparing carriers — not just plans — is where a local independent agency earns its keep. If you'd like us to run that comparison for you, call (239) 341-9545.

When Can You Enroll in Plan G, and Why Does Timing Matter?

Your Medigap Open Enrollment Period is the six months that begin the month you turn 65 and are enrolled in Medicare Part B. During that window, carriers in most situations must accept your application regardless of health history — this is the one time enrollment is straightforward for everyone.

Outside that window, the carrier decides. An application submitted later can be subject to medical underwriting, meaning the carrier sets rates and approves or declines the application based on health questions. There are a few guaranteed-issue situations — for example, when a Medicare Advantage plan you joined when first eligible ends in your area — but they're specific, not automatic. If you're moving, losing other coverage, or leaving a group plan, ask before you assume.

This is also where the Advantage-to-Supplement path gets tricky. Switching from a Medicare Advantage plan back to Original Medicare plus a supplement is possible, but outside guaranteed-issue situations, underwriting can apply. Planning before you make the switch is far easier than repairing it afterward.

Does Plan G Work with Original Medicare or Medicare Advantage?

Plan G works only alongside Original Medicare (Parts A and B). Federal law prohibits selling a Medigap policy to someone enrolled in Medicare Advantage, and you can't use both at once. If you currently have an Advantage plan and want Plan G, the sequencing matters: talk to an agent first, then time the switch so you're not left comparing carriers while already outside a protected window.

What Plan G does not cover is worth stating plainly, because no supplement covers these: prescription drugs, dental, vision, hearing aids, and long-term care beyond what Medicare itself covers. Prescription coverage comes from a separate Part D plan, which you can buy alongside Plan G. Skipping Part D when you first enroll can trigger a late-enrollment penalty later, so it belongs in the same conversation.

For a broader look at how Medigap fits into a full retirement coverage plan, see our guide to Medicare insurance options on our main site.

Why Do So Many Florida Retirees Choose Plan G Over an Advantage Plan?

Southwest Florida has a dense Medicare Advantage market, and Advantage plans often advertise low premiums. The difference shows up at the point of care: networks, referrals, and prior authorization. Plan G, paired with Original Medicare, lets you see any doctor or hospital nationwide that accepts Medicare — no network to check, no referral to chase. Snowbirds who split the year between Lee County and another state tend to value that flexibility more than almost any other feature.

There's also the excess-charge factor we mentioned earlier. In a market where a meaningful share of physicians don't take Medicare assignment, a plan that absorbs excess charges protects you from surprise balances. An Advantage plan network handles its own billing rules; with Original Medicare plus Plan G, the math is transparent.

The flip side is the premium. Plan G carries a monthly premium that Advantage plans often don't. Whether that trade makes sense depends on how often you use care, whether your doctors are in networks, and how much billing predictability is worth to you. That's a conversation, not a formula — and it's the conversation we have most often in our Fort Myers and Cape Coral seminars.

When an emergency happens, the case for a supplement is at its clearest. Ground ambulance transportation to a hospital is covered under Medicare Part B when it's medically necessary, but after the Part B deductible, Medicare leaves you responsible for 20% of the Medicare-approved amount (Medicare.gov, Ambulance Services). With Plan G, that coinsurance is covered once your Part B deductible is met. Nobody plans the ride; the plan you choose beforehand decides the bill afterward.

How We Help Lee County Residents Compare Plan G Carriers

XactInsure is an independent, Licensed Florida Insurance Agency serving Cape Coral, Fort Myers, and communities across Lee County for years — Bonita Springs, Estero, Lehigh Acres, Punta Rassa, Pine Island, and the surrounding neighborhoods included. Because we're independent, we can put carrier quotes side by side rather than steering you to a single company's product.

Our process is straightforward. We start with your doctors and prescriptions, then your budget and how you feel about copays versus premiums. Then we lay out Plan G, Plan N, and High-Deductible G against any Advantage plans in your zip code, so you're comparing the whole field instead of one shelf of it. Agents are generally compensated by the carrier when you enroll; confirm any fee arrangement directly with your agent.

If you'd rather review your options in person, reach our team through our contact page and we'll set a time that works. And if your spouse is also approaching 65, note that Medigap policies are individual — each spouse needs their own policy, and each has their own Open Enrollment Period.

Frequently Asked Questions About Medicare Supplement Plan G

Is Plan G better than Plan F?

For anyone newly eligible for Medicare, the question answers itself: Plan F is no longer sold to people who became eligible after January 1, 2020, so Plan G is the closest equivalent available. The only benefit difference is the Part B deductible, which Plan G requires you to pay yourself. If you were eligible before 2020 and still have Plan F, there is generally no benefit reason to switch — though comparing premiums is always reasonable.

Does Plan G cover the Part B deductible?

No. Plan G covers everything else Medigap can cover, but you pay the annual Part B deductible out of pocket before the plan begins paying its share of Part B services. After you've met the deductible, Plan G covers the 20% coinsurance for the rest of the calendar year. The High-Deductible Plan G version requires a larger deductible across both parts before benefits begin.

Can I switch from Medicare Advantage to Plan G?

Yes, but timing and underwriting matter. Outside guaranteed-issue situations, carriers can use medical underwriting, and the carrier sets rates and approves or declines the application. If you're within a guaranteed-issue window — such as when your Advantage plan leaves your area — enrollment protections apply. Talk with a licensed agent before you disenroll so the sequencing works in your favor.

Do Medicare Supplement premiums go up every year?

They can. Carriers file rate adjustments with state regulators, and attained-age-rated policies may also increase as you move into older age bands. Benefits never change — Plan G benefits are standardized by law — but the price of those benefits is set by each carrier and can change at renewal. Comparing carriers periodically is one of the few levers you control.

Can I use Plan G with any doctor?

Plan G works with any doctor or hospital that accepts Original Medicare nationwide. If a provider accepts Medicare but doesn't take assignment, Plan G also covers the Part B excess charges they may bill — up to Medicare's limit. You never need a referral, and there are no networks to verify before scheduling care.

XactInsure is an independent insurance agency serving Southwest Florida. Licensed in Florida. Not affiliated with or endorsed by the government or the federal Medicare program. Plan availability varies by area and year. Assistance is provided by a licensed agent.

Ready to compare Plan G against your other options with a local, licensed agent? Call (239) 341-9545 or request a plan review — we serve Cape Coral, Fort Myers, and all of Lee County, and we'll lay out every option on the table so you can choose with confidence.