Medicare Supplement

Plan G, Plan N, or high-deductible G in Winter Haven? What each Medigap letter really covers

Winter Haven, Fla. — If you have shopped for a Medicare Supplement policy lately, you have probably noticed something strange: every insurer seems to sell a "Plan G," and each one describes it a little differently. Here is the part the ads do not always spell out. Under federal rules, a Medigap plan letter means the same thing no matter which company sells it. A Plan G at one insurer covers the same gaps in Original Medicare as a Plan G at any other insurer.

That standardization is set by the Centers for Medicare & Medicaid Services (CMS). What changes between insurers is the price, the customer service, and sometimes extras like a gym benefit — not the core coverage tied to the letter.

Why the letters exist in the first place

Before standardization, comparing Medicare supplement policies was nearly impossible. Congress fixed that. Today, most states — Florida included — use the federal lettered plans (A through N, with some letters retired). Winter Haven is in Polk County, and the same lettered plans available across Florida are available here.

Because coverage inside each letter is set by law, the meaningful shopping questions are about price, the company's reputation, and how premiums change over time — not whether "their" Plan G is somehow better.

Plan G: the most comprehensive letter for new enrollees

Plan G covers most of what Original Medicare leaves behind: the Part A hospital deductible, coinsurance for hospital and skilled nursing stays, the 20% Part B coinsurance, the first three pints of blood, hospice cost-sharing, and some foreign travel emergency care.

The one thing Plan G does not cover is the Part B deductible. You pay that yourself each year before Plan G kicks in on outpatient services.

Plan F, which also covered the Part B deductible, is closed to anyone who became eligible for Medicare on or after January 1, 2020. If you were eligible before that date and never enrolled, you may still be able to buy it.

High-deductible Plan G: same coverage, different cost structure

High-deductible Plan G covers exactly the same services as regular Plan G. The difference is that you pay out of pocket until you meet a yearly deductible set by CMS, and then the plan pays as usual. Premiums are typically lower, but you take on more upfront risk in any year you use a lot of care.

It is the same federal standard, just a different way of splitting the cost between you and the insurer.

Plan N: lower premium, small copays at the point of care

Plan N covers most of the same gaps as Plan G, with a few trade-offs:

• You pay a copay of up to $20 for some office visits.
• You pay up to a $50 copay for emergency room visits that do not result in admission.
• Plan N does not cover Part B "excess charges" — the extra amount some doctors can bill above the Medicare-approved rate.
• Like Plan G, it does not cover the Part B deductible.

For people who see doctors who accept Medicare assignment, those excess charges rarely come up. That is why some enrollees prefer Plan N's lower premium.

Plans K and L: cost-sharing plans with an out-of-pocket cap

Plans K and L work differently from G and N. Instead of paying 100% of most gaps, they pay a percentage:

• Plan K pays 50% of certain services (like the Part A deductible, Part B coinsurance, and skilled nursing coinsurance) until you hit an annual out-of-pocket limit set by CMS. After that, the plan pays 100% for the rest of the year.
• Plan L works the same way but pays 75% until you reach its (lower) annual out-of-pocket limit.

Neither covers the Part B deductible. These plans can appeal to people who want a lower premium and are comfortable sharing more of the cost until the annual cap is reached.

A few important exceptions

Three states — Massachusetts, Minnesota and Wisconsin — do not use the federal letter system. They have their own standardized Medigap plans. If you move to or from one of those states, your options will look different.

Also worth knowing:

• Medigap only works with Original Medicare. It does not pair with Medicare Advantage.
• Your best pricing protection usually comes during your six-month Medigap Open Enrollment Period, which starts when you are 65 and enrolled in Part B. Outside that window, insurers can use medical underwriting in most states.
• Medigap does not cover prescription drugs. For that, you would look at a stand-alone Part D plan, which in 2026 has a $2,100 out-of-pocket cap and a maximum deductible of $615.