Medicare Supplement

What's changing for Medigap in Louisville for 2027: rules, resets, and rate filings

LOUISVILLE, Ky. — As the calendar turns toward 2027, Medigap shoppers in Louisville have a few moving parts to watch: which standardized plan letters they can still buy, the annual reset of the Part B deductible that shapes Plans G and N, the yearly rate-filing season at the Kentucky Department of Insurance, and any insurer coming or going from the local market. None of that changes what Medigap is — a supplement that helps pay what Original Medicare leaves behind — but it does shape what a Louisville shopper will actually see when they compare policies for the coming year.

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Which Medigap letters you can buy in 2027

Medigap plans are standardized by letter across the country, which means a Plan G sold by one Kentucky insurer covers the same core benefits as a Plan G sold by another. What differs is the premium and the company behind it.

If you are newly eligible for Medicare, the plan letters available to you are A, B, D, G, G-HD (high-deductible G), K, L, M, and N. Plans C and F remain available only to people who were eligible for Medicare before January 1, 2020. That rule has been in place since the Medicare Access and CHIP Reauthorization Act phased those two plans out for new enrollees, and it carries into 2027 unchanged.

The Part B deductible reset — and why it matters for G and N

Plans G and N — two of the most commonly purchased letters — are designed around the Part B deductible. With Plan G, you pay the Part B deductible each year, and after that the plan picks up the Part B coinsurance. Plan N works similarly, with some added copays for certain office and emergency visits.

Every January 1, that Part B deductible resets. The 2027 amount will be announced by the Centers for Medicare & Medicaid Services later in the year; you can confirm it at Medicare.gov once it is posted. Practically, that reset is the first "out-of-pocket" event of the new year for most G and N enrollees, so it is worth building into your January budget.

The high-deductible version of Plan G (G-HD) works differently: you pay a higher annual deductible before the plan begins covering costs, in exchange for a lower monthly premium. That deductible amount also resets each January.

Rate-adjustment season in Kentucky

Medigap premiums are not set by Medicare. In Kentucky, insurers file their proposed rates with the Kentucky Department of Insurance, and any change to your Medigap premium for 2027 will come from that filing process — not from a federal rule.

Two things follow from that:

• You will not see a single, statewide Medigap "rate increase." Each insurer files its own numbers for each plan letter, and increases can vary widely from one company to the next even for the same lettered plan.
• If your renewal notice shows a premium change you were not expecting, you can compare it against other insurers' current rates using the Kentucky Department of Insurance's Medigap rate guide and Medicare.gov's Medigap policy search.

Because Medigap plans of the same letter cover the same benefits, price and company service are usually the differences that matter most when comparing.

Insurers entering or leaving the Kentucky market

Medigap carriers can enter or exit a state from year to year, and the mix available in Jefferson County can shift as a result. There is no single public "who's new, who's leaving" list the way there is for Medicare Advantage.

The most reliable way to see who is selling Medigap in Louisville for 2027 is to run a search on Medicare.gov's Medigap policy search using your ZIP code. That tool lists the insurers licensed to sell each standardized plan letter in your area. The Kentucky Department of Insurance and the Kentucky State Health Insurance Assistance Program (SHIP) can also confirm which companies are actively marketing policies to Louisville residents.

When you can switch, and when medical underwriting applies

Unlike Medicare Advantage and Part D, Medigap does not have a nationwide Annual Enrollment Period. Your strongest protection is your one-time Medigap Open Enrollment Period — the six months that begin the month you are 65 or older and enrolled in Part B. During that window, insurers cannot deny you a policy or charge you more because of health history.

Outside that window, Kentucky generally allows insurers to use medical underwriting when you apply to switch Medigap plans or insurers, which means your health can affect whether you are accepted and at what price. There are limited guaranteed-issue situations (for example, if certain coverage ends involuntarily). Before switching for 2027, it is worth calling Kentucky SHIP to confirm whether your situation qualifies.

How to check what's available in Louisville

The table on this page shows the standardized Medigap plan letters available in Kentucky for 2027. To turn that into a personal shortlist:

1. Go to Medicare.gov and use the Medigap policy search with your Louisville ZIP code. 2. Compare rates for the same plan letter across insurers using the Kentucky Department of Insurance's Medigap rate guide. 3. Call Kentucky SHIP for free, unbiased help — they can walk you through your options without selling anything. 4. Call 1-800-MEDICARE with questions about Original Medicare rules that affect how Medigap pays.