Medicare Supplement

Medigap in Indianapolis for 2026: the rule changes, deductible reset and rate season explained

INDIANAPOLIS — If you have a Medigap policy in Marion County, or you are thinking about buying one for the first time, a handful of things reset every year. Rates get refiled with the state, the Part B deductible that Plans G and N are built around ticks over on Jan. 1, and the list of plan letters you can buy depends on when you first became eligible for Medicare. Here is what Indianapolis readers should keep an eye on heading into 2026.

Medicare SupplementIndianapolis, IN

What is actually changing for 2026

Medigap plans themselves are federally standardized, so a Plan G sold by one company covers the same benefits as a Plan G sold by another. What changes from year to year is not the benefit design — it's the numbers those benefits sit on top of, and the roster of companies selling them in Indiana.

Three things reset on the calendar:

1. The Part B deductible, which Plans G and N pay after you meet it, is updated by CMS each year. The 2026 figure is posted at medicare.gov. 2. Medigap premiums for the coming year are filed with the Indiana Department of Insurance during rate season. Increases (or decreases) vary by insurer, by plan letter and sometimes by your age or ZIP code. 3. The list of insurers offering Medigap in Marion County can shift as companies enter or leave the Indiana market.

Which plan letters you can buy in Indiana

Indiana follows the federal standardization rules. If you are newly eligible for Medicare today, the plan letters available to you are:

• Plan A
• Plan B
• Plan D
• Plan G
• High-deductible Plan G
• Plan K
• Plan L
• Plan M
• Plan N

Plans C and F are only for people who were eligible for Medicare before Jan. 1, 2020. That rule comes from the federal MACRA law and is not changing for 2026. If you were eligible before that date and already have Plan C or Plan F, you can keep it; you can also still buy into those plans if you qualify.

Plan G and high-deductible Plan G are the two most common choices for newly eligible enrollees, largely because Plan F is off the table for that group.

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

Plans G and N are designed to pay most of what Original Medicare doesn't, once you have met the Part B deductible. That deductible is a fixed federal dollar amount that changes each January.

For 2026, the specific figure is published on medicare.gov under Medicare costs. Before you sign paperwork on a new Medigap policy, it's worth looking up the current number so you know exactly what you'll pay out of pocket before the plan kicks in. Nothing about the plan's structure changes — only the threshold does.

High-deductible Plan G works differently: you pay a much higher yearly amount before coverage starts, and that number is also reset annually by CMS.

Rate-adjustment season in Indiana

Indianapolis readers often ask why their Medigap premium went up when they didn't change anything. The answer is rate season.

Every insurer selling Medigap in Indiana has to file its proposed premiums with the Indiana Department of Insurance. Rates can vary based on the plan letter, your age (some policies are attained-age, some issue-age, some community-rated), tobacco use, and sometimes ZIP code. Because filings happen at the company level, one insurer's Plan G rate can move very differently from another's, even though the benefits are identical.

Two practical steps before renewal:

• Look up the Indiana Medigap rate guide published by the state insurance department. It compares current premiums side by side.
• Use the Medicare.gov Medigap policy search, enter your Indianapolis ZIP code, and see which companies are currently offering each plan letter in your area.

If you find a lower rate on the same plan letter elsewhere, you can apply to switch — but outside of your one-time Medigap Open Enrollment Period (the six months starting when you turn 65 and enroll in Part B), insurers in Indiana can use medical underwriting. That means they can ask health questions and decline you. It's worth talking with SHIP before you drop a policy you already have.

Insurers entering or leaving

The list of companies selling Medigap in Marion County isn't static. Because we don't publish a live insurer roster on this page, the most reliable way to see who is currently offering Medigap to Indianapolis residents is:

• The Medicare.gov Medigap policy search, which lets you filter by ZIP code and plan letter.
• The Indiana Department of Insurance Medigap rate guide.
• Indiana SHIP (State Health Insurance Assistance Program), which offers free, unbiased counseling.

If a company you're with stops selling new policies in Indiana, that doesn't automatically cancel your coverage — Medigap policies are guaranteed renewable as long as you pay the premium. But it may affect your options if you want to switch later.