Medicare Supplement

Miss This 6-Month Window and Medigap Gets Harder

Miss This 6-Month Window and Medigap Gets Harder — plain-language Medicare information for Cornelius, North Carolina.

CORNELIUS, N.C. — If you are turning 65 in Cornelius, there is one stretch of time that quietly shapes what a Medicare Supplement policy — better known as Medigap — will cost you and whether an insurer can turn you down. It is called the Medigap Open Enrollment Period, and it lasts just six months.

It starts the first month you are both 65 and enrolled in Medicare Part B. Once it ends, it does not come back.

What the Medigap Open Enrollment Period actually is

Medigap is private insurance that helps pay some of the out-of-pocket costs Original Medicare (Part A and Part B) leaves behind, like coinsurance and hospital deductibles. It only works alongside Original Medicare — not with a Medicare Advantage plan.

Your six-month Medigap Open Enrollment Period is set by federal law. It begins automatically the first month you are 65 or older and enrolled in Part B. You do not sign up for it. You do not need to request it. The clock simply starts.

During those six months, you have what is called a "guaranteed issue" right for any Medigap policy sold in North Carolina. An insurer:

• Cannot refuse to sell you a policy it offers.
• Cannot make you wait for coverage to start (with limited exceptions for pre-existing conditions if you had less than six months of prior creditable coverage).
• Cannot charge you a higher premium because of your health history.

Why this window matters so much

Outside of this six-month window, most people who apply for Medigap can be medically underwritten. That means the insurance company can look at your health, ask questions, and decide whether to offer you a policy — and at what price. In some cases, they can decline you altogether.

That is the single biggest reason Medicare counselors urge people to understand this window before it slips by. A health event a year or two after 65 can change what is available to you if you did not lock in Medigap coverage during your open enrollment.

There are a few limited "guaranteed issue" situations later on — for example, if certain employer coverage ends or a plan leaves your area — but those are narrow exceptions, not a second open enrollment.

How Cornelius residents fit in

Cornelius is in Mecklenburg County, where Medicare beneficiaries have access to Original Medicare (which pairs with Medigap) and to a range of Medicare Advantage and Part D plans offered by multiple carriers. Medigap policy availability and pricing are regulated at the state level in North Carolina, while Medicare Advantage and Part D plan availability is set at the county level.

If you are weighing Original Medicare plus a Medigap policy against a Medicare Advantage plan, remember: switching from Medicare Advantage back to Original Medicare with Medigap later on is possible, but it may involve medical underwriting once your Medigap open enrollment has passed.

Timing tips as your 65th birthday approaches

• If you plan to take Part B at 65, your Medigap window will line up with your Part B start date.
• If you delay Part B because you have qualifying employer coverage, your six-month Medigap window will not start until you actually enroll in Part B later.
• You can apply for a Medigap policy up to a few months before your window opens in many cases, so the coverage is ready to go on day one.

A quick note on 2026 Medicare figures

Medigap is separate from Part D drug coverage, but many people shop for both around the same time. For 2026, Medicare has set the Part D out-of-pocket cap at $2,100 and the maximum Part D deductible at $615. The coverage gap (the old "donut hole") has been eliminated as of 2025, and there is now an optional Medicare Prescription Payment Plan that lets you spread drug costs across the year. IRMAA income-related surcharges begin above $109,000 for a single filer in 2026.

None of those figures change the Medigap rules — but they are worth knowing as you plan.

Where to get unbiased help

• medicare.gov — official plan finder, Medigap policy search, and rule explanations.
• 1-800-MEDICARE — 24/7 help from Medicare directly.
• North Carolina SHIIP — the state's Seniors' Health Insurance Information Program offers free, one-on-one counseling for people on Medicare and their families. It is part of the national SHIP network.