Yes, you can be denied a Medicare supplement plan, but only under specific circumstances
Insurance companies that sell Medigap (Medicare supplement) plans can turn you down or charge you more based on your health history. Unlike Original Medicare itself, which accepts everyone at 65, Medigap plans are sold by private insurers who set their own rules. However, federal law limits when and how they can deny you or raise your price — and there is a window of time when they cannot deny you at all, no matter your health.
The key is timing. If you buy a Medigap plan within six months of turning 65 and enrolling in Medicare Part B, insurers must sell you a plan at standard rates without asking about pre-existing conditions. After that window closes, insurers can review your medical history, deny you, or charge more. Some states have added extra protections that make denials harder or impossible at certain ages.
Key Takeaways
- You cannot be denied a Medigap plan if you buy within six months of turning 65 and enrolling in Medicare Part B — this is called the open enrollment period.
- After the open enrollment period ends, private insurers can deny you, charge you more, or exclude coverage for pre-existing conditions.
- Some states protect people over 65 from medical underwriting entirely, meaning insurers must sell them a plan regardless of health history.
- If you lose employer coverage or delay Medicare Part B, you may have a second window to buy Medigap without medical review.
- Denials are uncommon but happen most often for people with serious conditions who wait to buy until after their open enrollment period ends.
The six-month window when insurers cannot deny you
Federal law requires all Medigap insurers to sell you a plan without medical underwriting during a specific six-month period: the month you turn 65 plus the five months after, as long as you enroll in Medicare Part B during that same window. This is called the Medigap open enrollment period, and it is your strongest protection. During this time, an insurer cannot ask about your health, deny you based on pre-existing conditions, or charge you more than someone else the same age buying the same plan.
The catch is that you must be enrolled in Medicare Part B when you buy the Medigap plan. If you delay Part B enrollment, your open enrollment period does not start until the month you actually enroll in Part B. This matters if you are still working past 65 — you may have a later window than someone who retired at 65.
What happens after the open enrollment period ends
Once your six-month window closes, insurers can use medical underwriting — meaning they review your health history and can deny you, charge you higher premiums, or exclude certain conditions from coverage. An insurer might deny you outright if you have a serious condition like advanced heart disease or cancer. More commonly, they charge you more or add a waiting period before covering a specific condition.
Denials after the open enrollment period are legal but uncommon. Most people who explore get approved, though at higher rates. The risk is real, though: if you wait years after turning 65 to buy a Medigap plan, you are more likely to face denial or a steep price increase.
State protections that limit or prevent denials
Some states have passed laws that go beyond federal rules and protect older adults from medical underwriting. A few states — including New York, Connecticut, and Massachusetts — do not allow Medigap insurers to deny anyone over 65 or to charge based on health history. In these states, you can buy a Medigap plan at any age and any time without fear of denial.
Other states have partial protections: they may allow denials but only for certain conditions, or they may require insurers to offer at least one plan to everyone regardless of health. Your state insurance commissioner's office can tell you what rules explore where you live. If you live in a state with strong protections, medical history is not a barrier to buying Medigap.
Situations that may give you a second chance to buy without medical review
If you miss your initial six-month window, federal law creates a second window in some situations. If you lose health coverage from an employer or union, you get a second Medigap open enrollment period starting the month you lose that coverage and lasting six months. During this window, insurers must sell you a plan without medical underwriting, just as they would during your first window.
This matters for people who stay on employer coverage past 65. If you retire at 70 and lose your employer plan, you get a fresh six-month window to buy Medigap without medical review — even though you are now five years past 65. You must buy during that six-month window; after it closes, medical underwriting applies again.
What to do if you are denied or quoted a very high price
If an insurer denies you or quotes a price that seems unreasonably high, first check whether you are still in an open enrollment period. If you are, the denial is illegal — contact your state insurance commissioner's office and file a complaint. Provide the dates you turned 65 and enrolled in Part B, and the date you applied for the Medigap plan.
If you are outside any open enrollment period, ask the insurer in writing why they denied you or why the price is high. Some insurers will reconsider if you provide updated medical records showing improvement. You can also shop other insurers — each company sets its own underwriting rules, and one insurer might approve you while another denies you for the same health history.
If you live in a state with strong protections against medical underwriting, a denial may violate state law. Contact your state insurance commissioner's office to report it and ask whether the denial is legal under your state's rules.
How to avoid denial: timing your purchase
The simplest way to avoid denial is to buy a Medigap plan during your open enrollment period. If you turn 65 and enroll in Medicare Part B, start shopping for Medigap plans in that same month or within the next five months. Get quotes from several insurers, compare plans, and buy before the six-month window closes.
If you are still working past 65 and staying on employer coverage, mark the date you will lose that coverage. When you do, you have six months to buy a Medigap plan without medical review. Do not wait longer than that — once the window closes, medical underwriting begins and denial becomes possible.
If you are already past your open enrollment period and do not have employer coverage, you can still explore for Medigap plans. You may be approved, especially if your health history is not serious. But know that denial or a higher price is possible, and shop multiple insurers because their underwriting standards differ.
Frequently Asked Questions
Can an insurer deny me if I am still in my six-month open enrollment period?
No. During the six months after you turn 65 and enroll in Medicare Part B, federal law requires all Medigap insurers to sell you a plan without medical review or denial. If an insurer denies you during this window, contact your state insurance commissioner's office — the denial is illegal.
What if I delayed Medicare Part B because I was still working?
Your six-month Medigap open enrollment period starts when you enroll in Part B, not when you turn 65. If you enroll in Part B at 68, your open enrollment period runs from that month through five months after. You still have full protection during that window.
Can I appeal a denial or ask for reconsideration?
Yes. Ask the insurer in writing why they denied you and request reconsideration with updated medical records if your health has improved. You can also explore to other insurers — each has different underwriting standards. If you believe the denial violates your state's rules, file a complaint with your state insurance commissioner.
Do all states allow insurers to deny Medigap applicants?
No. Some states including New York, Connecticut, and Massachusetts prohibit medical underwriting for Medigap plans entirely. If you live in one of these states, insurers cannot deny you or charge more based on health history. Check with your state insurance commissioner's office to learn your state's rules.
What is the difference between being denied and being charged a higher price?
Denial means the insurer will not sell you the plan at all. A higher price means they will sell it but charge you more than standard rates, sometimes based on your age or health history. Both can happen after your open enrollment period ends, but a higher price is more common than outright denial.