Insurance

By the Retiree Report Editorial Team · Updated 2026-07-07 · 7 min read

This article is general information, not financial, tax, or legal advice. Consult a licensed professional before acting on it.

The Medicare Advantage trial right: your 12-month window to switch back

Say you signed up for a Medicare Advantage plan, and a few months in, it isn’t what the brochure promised. Your cardiologist is out of network, or a prior authorization keeps blocking a scan. Federal law gives some people a way out that most enrollees have never heard of: the Medicare Advantage trial right, a 12-month window to return to Original Medicare and buy a Medigap policy with no health questions asked.

That last part is the whole ballgame. Buying Medigap outside a protected window usually means medical underwriting, and a carrier can charge you more or turn you down. The trial right suspends that.

What is the Medicare Advantage trial right?

The trial right is a guaranteed issue protection tied to your first year in a Medicare Advantage plan. If you leave the plan and go back to Original Medicare within 12 months, insurance companies in your state must sell you certain Medigap policies at their standard rate, regardless of your health history. No underwriting. No pre-existing-condition surcharge. According to Medicare.gov, this is one of the situations where you have a guaranteed issue right rather than the usual “the carrier decides” arrangement.

There are two ways to qualify, and the distinction matters.

The first: you joined a Medicare Advantage plan (or a PACE program) when you first became eligible for Medicare at 65, and within that first year you decide Original Medicare suits you better. The second: you already had a Medigap policy, you dropped it to try Medicare Advantage for the first time, and you want to switch back before the year is up. Both give you the trial right. The second one comes with an extra perk we’ll get to below.

How long do you actually have, and when does the clock start?

Twelve months from the day your Medicare Advantage coverage starts. That’s the outer edge. Miss it and the trial right is gone—you’d be back to underwriting or waiting for a different enrollment window.

But the Medigap application has its own tighter timing, and this is where people trip. You can apply for a Medigap policy as early as 60 calendar days before your Medicare Advantage coverage ends, and no later than 63 days after it ends. Medicare.gov spells out that 63-day tail. So the smart move is to line up the Medigap policy first, get the effective date set, and then let the Medicare Advantage plan lapse—not the other way around, which risks a coverage gap.

When can you actually drop the Advantage plan? Two common openings. The Medicare Advantage Open Enrollment Period runs January 1 through March 31 every year, and per the CMS 2026 enrollment guidance, anyone enrolled in an MA plan as of January 1 gets a one-time chance during that window to return to Original Medicare (and pick up a stand-alone Part D drug plan). Separately, the trial right itself functions as a Special Enrollment Period, so you’re not strictly boxed into January-to-March if your 12 months line up differently. The National Council on Aging describes the trial period as a distinct SEP running up to 12 months from when you first joined.

Which Medigap plans can you buy?

Here’s the part that surprises people. If you’re in the first scenario—joined Medicare Advantage right at 65 and want out—you can buy any Medigap policy sold in your state, from any company. That’s a wide-open menu.

The second scenario is narrower but arguably kinder. If you dropped a Medigap policy to try Medicare Advantage and want to come back, you first have the right to buy back the exact same policy from the same insurer, if that company still sells it. If it doesn’t, you can pick from Medigap Plans A, B, C, D, F, G, K, or L offered by any carrier in your state.

One catch worth knowing. Plans C and F—the ones that cover the Part B deductible—are no longer available to anyone who became eligible for Medicare on or after January 1, 2020. That’s a rule from the Medicare Access and CHIP Reauthorization Act of 2015 (MACRA), and the Medicare Rights Center explains that these plans were closed to newly eligible beneficiaries. If you turned 65 in 2020 or later, Plans D, G, and High-Deductible G are the practical top-tier choices. If you were eligible before 2020, C and F may still be on the table.

Which one fits depends on how you weigh predictable premiums against out-of-pocket costs—the same tradeoff we walk through in our comparison of Medigap Plan G versus Plan N.

Why the guaranteed-issue part is the whole point

Outside a protected window, Medigap is medically underwritten in most states. A carrier can ask about your diabetes, your heart stent, your cancer history—and price accordingly or decline you. That’s the wall a lot of people hit when they try to leave Medicare Advantage after year one and discover they can’t get affordable supplemental coverage. The plan they wanted to escape becomes the plan they’re stuck with.

The trial right knocks that wall down for 12 months. Underwriting is off the table, so a health condition can’t be used against you on price or eligibility.

Is it a permanent escape hatch? No. Read the rule carefully and you’ll see it hinges on the phrase “for the first time.” The trial right applies to your first Medicare Advantage plan. If you use it, go back to Original Medicare, and later hop into Medicare Advantage again, there’s generally no second trial right waiting when you change your mind. Treat it as a one-shot safety net, not a revolving door. (A handful of states—Connecticut, Massachusetts, and New York among them—require guaranteed-issue Medigap more broadly, so your options may be better than the federal floor. Check with your State Health Insurance Assistance Program.)

What to do before you pull the trigger

Don’t cancel anything first. Start by getting Medigap quotes and confirming a policy’s effective date, then coordinate the switch so your Original Medicare and Medigap coverage begin the day your Advantage plan ends. Order matters more than speed here.

Two calls are worth making. Reach your State Health Insurance Assistance Program (SHIP)—free, unbiased counseling, no sales pitch—through Medicare.gov or by calling 1-800-MEDICARE. And if you’re leaving Medicare Advantage, remember you’ll need a stand-alone Part D plan for drug coverage, because Original Medicare doesn’t include it. If you’re still deciding whether the switch even makes sense, our breakdown of Medicare Advantage versus Original Medicare for 2026 lays out the day-to-day differences. Keep written proof of your trial-right eligibility—your enrollment dates and disenrollment notice—in case a carrier questions it.

This isn’t medical or financial advice, and the right plan depends on your health, your budget, and your doctors. A licensed SHIP counselor can look at your specific situation before you commit.

What to remember

The Medicare Advantage trial right is a 12-month, one-time guarantee: leave your first MA plan within a year, return to Original Medicare, and buy Medigap with no health underwriting. Apply for that Medigap policy within the window that runs 60 days before to 63 days after your MA coverage ends, and set it up before you drop the Advantage plan so you don’t create a gap. It’s a genuine safety net—but it fires once, so use it deliberately.