Cancer-Free for Four Years, She Applied for Medigap. The Insurer Wanted One More Year.

A 69-year-old woman finished chemotherapy in mid-2022, rang the bell, and has been cancer-free ever since. This year she considered leaving Medicare Advantage for Original Medicare with a Medigap policy. She expected a routine application. The underwriter asked when she had last received cancer treatment. Four years was not enough under that insurer’s guidelines. It wanted five.

She felt healthy. Her oncologist was pleased. On the Medigap application, she was still one year early.

The Window That Already Closed

Federal law gives a new Medicare enrollee one protected Medigap enrollment period. It lasts six months and begins when the person is at least 65 and enrolled in Part B. During that window, an insurer cannot reject the applicant or charge more because of health problems. Afterward, most states allow medical underwriting unless the applicant qualifies for another guaranteed-issue right.

Once underwriting begins, medical history moves to the center of the application. Insurers may look back at cancer treatment, heart disease, chronic obstructive pulmonary disease, stroke, or diabetes complications. One carrier may examine the previous two years, another three, and another five. A rejection from one does not predict the answer from every company. This insurer’s line happened to be five years since treatment. At four, she did not cross it.

Leaving Advantage Is the Harder Direction

Medicare Advantage and Medigap follow different enrollment rules. A person can join or change an Advantage plan during the appropriate enrollment period without answering health questions. Moving in the other direction is harder. Someone can return to Original Medicare during an enrollment period, but that does not guarantee access to Medigap. Outside a protected window, the supplemental insurer may review the applicant’s medical history before saying yes.

That makes the decision at 65 less reversible than it appears. Medicare Advantage can be left. The Medigap policy someone wants on the other side may not be available. Most important, she should apply for Medigap before completing the move. Leaving Advantage first and learning about the cancer lookback afterward could leave her on Original Medicare without supplemental protection.

What a Medigap Rejection Leaves Exposed

Original Medicare has no annual out-of-pocket maximum. Part A can charge another hospital deductible when a new benefit period begins. Part B generally leaves the patient responsible for 20% of the Medicare-approved amount after the deductible, with no ceiling. Medigap Plan G covers most of those gaps after the Part B deductible. Approval replaces open-ended exposure with a known monthly premium. A denial leaves the patient deciding between remaining in Medicare Advantage or accepting Original Medicare’s uncapped cost-sharing.

For a cancer survivor who wants wider access to specialists or cancer centers, neither choice is casual.

State Law May Offer Another Route

The six-month federal window is only the starting point. State protections vary considerably. New York and Connecticut provide wide year-round access. Massachusetts offers broad enrollment protections, while Maine provides a more limited annual opportunity involving at least Plan A. Other states offer birthday windows, but those usually help people who already own Medigap switch policies. They generally do not create a path from Medicare Advantage into a first Medigap policy.

Federal trial rights can also help someone who tried Medicare Advantage when first eligible and returns to Original Medicare within the first year. Other guaranteed-issue rights can arise when a plan ends, leaves the service area, or undergoes certain major network changes. At 69, the woman in this example may be outside the ordinary trial window. Her state and the reason she is leaving Advantage still matter.

Check the Exit Before Taking It

Before changing coverage, three steps can prevent a Medigap rejection from becoming a much larger problem:

• Ask several insurers how they word their cancer questions. The date that matters may be the last treatment, surgery, medication, or follow-up, depending on the application.
• Contact the state insurance department or State Health Insurance Assistance Program (SHIP) to check for guaranteed-issue rights that an agent may have missed.
• Keep the Medicare Advantage plan in place until Medigap approval and its effective date are confirmed. If this insurer’s fifth-year mark is approaching, put the application date on the calendar without assuming approval is guaranteed.

She was cancer-free in her doctor’s eyes. To one underwriter, she was still a year early. That difference is why Medigap approval belongs before the Medicare Advantage exit, not after.