When a Medicare Advantage plan pulls out of a member’s county, leaves Medicare altogether, or stops covering the place where that member lives, the member does not have to wait for the coverage to actually end before shopping for a replacement. Federal rules let a person apply for a Medigap policy as early as 60 days before the old plan’s coverage stops, not only in the weeks after it ends. Most of what gets said about this guaranteed-issue right focuses on the 63 days after a plan exits; the 60 days before it exits get far less attention, even though they open first. For someone on a fixed income, that earlier head start can be the difference between switching straight into a new policy and sitting exposed to an insurance company’s health questions while the clock runs out.
Two Windows, One Guaranteed-Issue Right
The rule covers one specific situation: a Medicare Advantage plan is leaving Medicare, pulling out of a member’s service area, or no longer covering where that member lives. In any of those cases, federal law gives the member a guaranteed-issue right to buy a Medigap policy without an insurance company reviewing their health history first. The window built around that right is not symmetrical. It opens 60 calendar days before the old plan’s coverage actually ends, and it closes only 63 calendar days after coverage ends. Both halves run on the same guaranteed-issue right; a member doesn’t get a second, separate right by waiting for the later half to open.
According to Medicare.gov’s guidance on when a Medigap policy can be bought, the right applies only if the member switches to Original Medicare rather than enrolling in another Medicare Advantage plan, and the new Medigap coverage cannot start until the old Medicare Advantage coverage actually ends. A member who instead re-enrolls in a different Medicare Advantage plan during that same stretch does not carry a guaranteed-issue right into a Medigap application; that door only opens for people leaving Medicare Advantage behind.
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What Actually Triggers the Right
Medicare.gov ties this right to a short, specific list of triggers: the Medicare Advantage plan is leaving Medicare altogether, the member is moving out of the plan’s service area, the plan will no longer cover where the member lives, or the plan didn’t follow the rules or misled the member. A member simply deciding they dislike their current plan does not qualify; the trigger has to come from the plan’s exit or misconduct, not personal preference. A plan shrinking its network or raising next year’s copays, on its own, isn’t one of the listed triggers either.
There’s a default worth knowing, too. If a member doesn’t actively pick a new Medicare Advantage plan during the annual Medicare Open Enrollment Period after their plan exits, Medicare.gov confirms they get automatically enrolled in Original Medicare. That’s precisely the scenario where the 60-day head start pays off: a member who lines up Medigap in advance avoids landing on Original Medicare’s standard cost-sharing with no supplement behind it, even for a few weeks.
Why the Head Start Beats the Deadline
Outside a guaranteed-issue period, a company selling Medigap can ask about pre-existing health conditions, charge a higher premium based on the answers, or decline to sell a policy at all. Medicare.gov spells out that same underwriting risk for people who miss their one-time Medigap Open Enrollment Period: they may pay more, have fewer companies willing to sell to them, and can be turned down outright based on medical history. That’s the exact exposure the guaranteed-issue right is built to prevent for someone who didn’t choose to lose their Medicare Advantage coverage in the first place.
The 60-day and 63-day windows exist to remove that underwriting risk for someone losing coverage through no choice of their own. Applying in the earlier half of the window lets a member’s new Medigap policy begin the same day Original Medicare coverage does, with no stretch where they’re carrying only Part A and Part B and no supplement behind either one.
The Paperwork That Backs Up the Claim
Medicare.gov’s guidance for this exact scenario is specific: keep any letters, notices, emails or claim denials that show when the Medicare Advantage coverage ended, and be ready to send copies with the new Medigap application. An insurance company processing a guaranteed-issue application isn’t taking a member’s word for the trigger date; it wants the paper trail that proves it.
Anyone unsure whether a particular move, plan exit or coverage change actually qualifies has somewhere to check before the window closes. The State Health Insurance Assistance Program answers exactly that kind of question, state by state, at no charge to the caller.
State Law Can Widen the Window, Never Narrow It
The federal floor is 60 days before and 63 days after, and Medicare.gov notes the right can run an extra 12 months in certain circumstances. States are also free to layer on broader guaranteed-issue protections under their own insurance law, on top of whatever federal law already guarantees.
Each state’s insurance department, not Medicare, administers those extra state-level protections and can confirm whether a particular circumstance qualifies for one. What no state can do is shrink the federal 60-day-before, 63-day-after window itself. That part of the guaranteed-issue right is fixed nationwide, regardless of which company sold the original Medicare Advantage plan or which state a member happens to live in when the plan exits.
What the plan letter does not do
An Annual Notice of Change lists what changed, but never compares the plan against the alternatives on cost, drugs and doctors.
The 2027 Medicare Open Enrollment Decision Kit includes a 42-page decision kit, a cost calculator spreadsheet that compares plans on cost, drugs and doctors and a prescription-by-plan comparison.
Run the comparison in The 2027 Medicare Open Enrollment Decision Kit.
This article was produced with AI assistance and reviewed by a human editor. Figures are linked to their primary sources; where a claim could not be verified from the public record, we say so.
