She Applied for Medigap 22 Months After a Stent. The Health Questions Reached Back 24.

She turned 65 in early 2024, kept Original Medicare and her employer’s retiree drug coverage, but skipped Medigap because the extra monthly premium felt steep. A $0-premium Medicare Advantage plan was always in the back of her mind as a fallback. Then came a mild heart attack and a coronary stent.

Twenty-two months later, feeling healthy again, she called several Medigap carriers to price Plan G. More than one application asked whether she had undergone a heart attack, angioplasty or stent procedure within the previous 24 months. She had. Two months suddenly looked like a very long time.

The Six-Month Window Was the Easy One

Federal law gives someone age 65 or older a one-time six-month Medigap open enrollment period beginning when Part B starts. During that window, insurers cannot reject an application or charge more because of health problems. Afterward, the rules change. Unless a guaranteed-issue right or stronger state protection applies, an insurer may ask medical questions, charge more or refuse to sell the policy.

The questionnaires are not uniform. Some current applications use 24-month lookbacks for coronary artery disease, heart attacks, angioplasty and stent placement; others use different periods or underwriting standards. So reaching month 25 would not guarantee her a Plan G. It could, however, change how a particular carrier views the same medical history. That is the part she never knew to ask about at 65.

Original Medicare Leaves a Bigger Gap Than It Looks

Without Medigap, she still has Original Medicare. In 2026, Part B costs $202.90 a month and carries a $283 annual deductible. After that, beneficiaries generally owe 20% of Medicare-approved Part B charges, and Original Medicare itself has no annual out-of-pocket ceiling.

For someone with a cardiac history, that open-ended percentage matters more than it might have before the stent. Follow-up imaging, specialist visits and outpatient procedures can keep producing coinsurance long after the original hospital stay is over. Part A brings its own cost sharing, including a $1,736 inpatient deductible per benefit period in 2026. A Medigap policy can absorb much of that exposure. The irony is that the moment she appreciates that protection most is also the moment obtaining it may have become harder.

Medicare Advantage Is an Alternative, Not a Reset Button

Medicare Advantage still gives her another way to cap annual medical spending, subject to the plan’s network, copays and prior-authorization rules. But there is an important distinction. Someone who joined Medicare Advantage when first eligible for Medicare at 65 can have a federal trial right to return to Original Medicare and buy certain Medigap policies if the switch happens within the first year. Another trial right can apply when someone drops an existing Medigap policy to try Medicare Advantage for the first time.  Neither describes her.

She never bought Medigap and did not join Medicare Advantage when first eligible. Enrolling in Advantage now does not restart that original 12-month federal protection. (IRMAA is one of several surcharges that silently inflate the real cost of Medicare; we mapped the rest in a free Medicare guide.)

Shop the Rules Before Assuming the Door Is Closed

She still has work to do before accepting the first no.

1. Apply with more than one Medigap carrier because underwriting questions and acceptance standards can differ.
2. Check state law for additional guaranteed-issue protections that may go beyond the federal rules.
3. Compare any rated Medigap offer with the real cost of staying on Original Medicare alone and with Medicare Advantage options available during an enrollment period.

Twenty-two months after the stent, she discovered that Medigap shopping has a memory. The useful part is knowing that one insurer’s clock is not necessarily every insurer’s clock, and a medical no today does not always mean the market stays closed forever.

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