Medigap Plans Can Refuse to Cover You — Unless You Know Your Rights | Senior Health Times

Key Takeaways

✓Medigap insurers can legally reject your application or charge higher premiums based on your health history — but only outside of protected enrollment windows.

✓Your most powerful protection is the six-month Medigap Open Enrollment Period, which begins the month you turn 65 and enroll in Medicare Part B.

✓Guaranteed issue rights give you a second chance at coverage without medical underwriting in specific life situations, such as losing employer coverage.

✓Waiting too long to enroll — or missing your protected window — can leave you subject to medical underwriting, where a pre-existing condition may result in denial.

✓Rules vary by state: some states offer stronger consumer protections than federal minimums, including year-round guaranteed issue rights.

What It Means When a Medigap Plan Can Refuse You

Medicare Supplement Insurance — commonly called Medigap — helps cover costs that Original Medicare does not pay, such as copayments, coinsurance, and deductibles. But unlike Medicare Advantage or Part D drug plans, Medigap policies sold by private insurers are not required to accept every applicant. Outside of specific protected time windows, insurers in most states can review your medical history, charge you more because of a health condition, or deny your application altogether. This process is called medical underwriting.

Knowing when you are protected — and when you are not — is one of the most important things any Medicare beneficiary can understand.

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Your Most Important Window: The Medigap Open Enrollment Period

Federal law gives every person turning 65 a six-month Medigap Open Enrollment Period. This window opens on the first day of the month in which you are both 65 or older and enrolled in Medicare Part B. During this period, any Medigap insurer operating in your state must:

Sell you any Medigap plan it offers
Charge you the same premium it charges someone in good health
Cover your pre-existing conditions (though a waiting period of up to six months may apply in some cases)

This window does not repeat automatically. Once it closes, you lose these federal protections unless a separate qualifying event applies.

What Happens If You Miss This Window

If you apply for Medigap after your open enrollment period ends and no other protection applies, insurers in most states can use medical underwriting. That means they can ask about your health history, decline to cover certain conditions, charge you a higher premium, or reject your application entirely. For people managing chronic conditions such as diabetes, heart disease, or COPD, this can make obtaining affordable Medigap coverage very difficult.

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Guaranteed Issue Rights: A Second Chance at Coverage

Even outside the open enrollment period, federal law provides guaranteed issue rights in certain situations. When these rights apply, an insurer must sell you a Medigap policy without medical underwriting.

Situations That Trigger Guaranteed Issue Rights

Common qualifying events include:

Losing employer or union group health coverage that was supplementing Medicare
Your Medicare Advantage plan leaves your area or stops accepting Medicare
You move out of your Medicare Advantage plan's service area
Your Medigap insurer goes bankrupt or otherwise ends your coverage
You enrolled in Medicare Advantage at 65 and want to switch back to Original Medicare within the first year

In each of these situations, you typically have 63 days from the date your previous coverage ends to exercise your guaranteed issue rights. Missing that deadline can mean losing the protection.

Which Plans Are Available Under Guaranteed Issue Rights

Guaranteed issue rights do not open up every Medigap plan. Federal law generally guarantees access to Plans A, B, K, and L in most situations, and Plans C, D, F, G, M, and N in others, depending on the specific qualifying event. Checking with your State Health Insurance Assistance Program (SHIP) counselor can help you understand exactly which plans you qualify for.

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How State Laws Can Expand Your Protections

Federal rules set a floor, not a ceiling. Several states have enacted stronger consumer protections that go beyond what federal law requires.

States With Year-Round or Expanded Guaranteed Issue

A handful of states — including New York, Connecticut, Massachusetts, Maine, and others — require Medigap insurers to accept applicants year-round regardless of health status. In these states, medical underwriting is prohibited entirely or significantly limited. If you live in one of these states, your options are considerably broader.

Other states have added protections for people under 65 who qualify for Medicare due to disability — a group that federal law does not require insurers to cover at all for Medigap purposes.

Because rules differ significantly by location, checking your state's specific regulations through your State Insurance Commissioner's office or a SHIP counselor is strongly recommended.

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People Under 65 on Medicare: A Frequently Overlooked Group

If you are under 65 and enrolled in Medicare because of a disability or End-Stage Renal Disease (ESRD), federal law does not require Medigap insurers to sell you a policy. Some states do require it, but many do not. If you are in this situation, contacting your state insurance department directly is the best first step to find out what options exist where you live.

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Practical Steps to Protect Yourself

Navigating Medigap enrollment does not have to be overwhelming. A few concrete steps can help:

Mark your calendar. Know exactly when your six-month open enrollment period begins and ends.
Do not delay Part B enrollment without a valid reason (such as active employer coverage), as this can delay your Medigap open enrollment window.
Contact your free SHIP counselor. Every state has a State Health Insurance Assistance Program offering no-cost, unbiased counseling. Find yours at Medicare.gov.
Check your state's rules. Your state may offer protections beyond federal minimums.
Act within 63 days if you experience a qualifying life event that triggers guaranteed issue rights.

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Sources

Medicare.gov — Medigap: https://www.medicare.gov/health-drug-plans/medigap
Centers for Medicare & Medicaid Services (CMS): https://www.cms.gov
KFF (Kaiser Family Foundation) — Medigap Overview: https://www.kff.org/medicare/issue-brief/medigap-overview/

Frequently Asked Questions

Can a Medigap insurance company deny my application?

Yes, in most states and outside of protected enrollment windows, Medigap insurers can deny your application based on your health history. However, during your six-month Medigap Open Enrollment Period or when guaranteed issue rights apply, they cannot legally turn you away or charge you more due to health conditions.

When does my Medigap open enrollment period start?

Your six-month Medigap Open Enrollment Period begins on the first day of the month you are both age 65 or older and enrolled in Medicare Part B. This window is a one-time federal protection. Enrolling in Part B late can delay when this window opens.

What are guaranteed issue rights for Medigap?

Guaranteed issue rights are federal protections that require Medigap insurers to sell you a policy without reviewing your health history. They apply in specific situations, such as losing employer coverage or your Medicare Advantage plan leaving your area. You typically have 63 days from losing prior coverage to act.

Does every state have the same Medigap rules?

No. Federal law sets minimum protections, but some states — including New York, Connecticut, and Massachusetts — require insurers to accept Medigap applicants year-round regardless of health. Other states add protections for people under 65 on Medicare. Check with your state insurance department for local rules.

Can I get Medigap if I am under 65 and on Medicare due to disability?

Federal law does not require Medigap insurers to sell policies to people under 65, even if they qualify for Medicare due to disability. However, some states do require it. Contact your State Health Insurance Assistance Program (SHIP) or state insurance commissioner to find out what is available where you live.

What happens if I miss my Medigap open enrollment period?

After your open enrollment period closes, insurers in most states can use medical underwriting — reviewing your health history to decide whether to cover you, at what price, or at all. This can make coverage harder to obtain if you have pre-existing conditions. Acting during your protected window is strongly advisable.

Medigap Plans Can Refuse to Cover You — Unless You Know Your Rights