You tried Medicare Advantage, and it didn’t turn out to be the right fit. Now you’re looking at Original Medicare with a Medigap policy to fill in the gaps, and you’ve run into an unexpected question: does an insurance company actually have to sell you one? The answer depends almost entirely on timing. This guide walks through when you have a guaranteed issue right to buy a Medigap policy after leaving a Medicare Advantage (MA) plan, what the 12-month “trial right” covers, and what your options generally look like if you’re outside those windows.
A State Health Insurance Assistance Program (SHIP) counselor sees a version of the same phone call a few times a year: someone who tried Medicare Advantage, had a rough plan year with a network gap or a denied referral, and now wants to know if going back to a Medigap policy is even possible. Sometimes the caller acted quickly enough that the answer is a straightforward yes. Other times, months spent comparing plans and asking around cost them their guaranteed issue right, and the conversation shifts to what medical underwriting might mean for them instead. The difference between those two calls almost always comes down to one thing: how quickly they moved once they decided to switch.
The Short Answer: It Depends on Timing
- If you’re within a federal guaranteed issue window, most commonly the 12-month trial right, an insurance company generally can’t turn you down or charge you more because of your health.
- Outside those windows, an insurance company is generally allowed to review your health history (called medical underwriting) and may decline to sell you a policy or charge a higher premium.
- Some states offer broader protections than federal law requires, so it’s worth checking with your State Insurance Department before assuming you’re out of options.
What Are Guaranteed Issue Rights?
Guaranteed issue rights, sometimes called Medigap protections, are specific situations defined by federal law where an insurance company can’t use your health to deny you coverage or raise your premium. If you qualify, the company generally:
- Has to sell you a Medigap policy, from the specific plan letters tied to your situation
- Has to cover your pre-existing conditions right away, with no waiting period
- Can’t charge you more because of past or present health problems
Outside of a guaranteed issue situation, applying for Medigap works differently. The company is generally allowed to ask health questions and decide whether to offer you a policy at all.
The 12-Month Trial Right: The Path Most People Use
The trial right is the guaranteed issue situation that applies to most people asking this question. It comes in two versions, and it helps to know which one describes your situation:
- You joined a Medicare Advantage plan the first time you became eligible for Medicare, and within 12 months you decide you want Original Medicare instead. You generally have a guaranteed issue right to buy any Medigap policy sold by an insurance company in your state. This applies whenever your first-ever Medicare Advantage enrollment happens, whether that’s right at 65, later because you delayed enrollment while on employer coverage, or earlier due to a disability.
- You already had a Medigap policy, dropped it to try Medicare Advantage for the first time, and within 12 months you want to go back. You generally have the right to get your old Medigap policy back from the same company, if it still sells that policy. If it doesn’t, you can generally buy a standardized Plan A, B, C, D, F, or G from a company in your state instead.
Two details trip people up. First, the trial right is a one-time protection tied to your first experience with Medicare Advantage. If you’ve already used it once, cycling through Medicare Advantage again later doesn’t generate a second trial right. Second, timing matters more than most people expect: Medicare.gov’s guidance on switching or dropping a Medigap policy points to applying for the new policy no more than 63 days after your Medicare Advantage coverage ends, so waiting to decide can close the window before you’ve had a chance to use it.
Other Situations That Can Trigger a Guaranteed Issue Right
The trial right isn’t the only guaranteed issue situation connected to Medicare Advantage. A few other circumstances generally qualify too:
- Your Medicare Advantage plan leaves Medicare entirely or stops offering coverage in your area
- You move outside your Medicare Advantage plan’s service area
- You switched or cancelled coverage because the insurance company misled you or didn’t follow the rules
- You have Original Medicare and an employer, union, COBRA, or retiree health plan that’s ending
Each of these has its own documentation and application window, generally no more than 63 days from when the prior coverage ends, so it’s worth confirming the specifics with your insurance company or a local SHIP counselor before assuming which situation applies to you.
What If You’re Outside a Guaranteed Issue Window?
If none of the situations above apply, and you’re past your trial right, you can still ask an insurance company for a Medigap policy, but there’s no federal requirement that they say yes. In most states, the company is generally allowed to:
- Ask about your health history as part of the application
- Decline to sell you a policy based on your health
- Charge you a higher premium than someone in better health
This is the timing trap that makes leaving Medicare Advantage a bigger decision than it might first appear, especially for someone managing an ongoing health condition. It doesn’t mean Medigap is out of reach, but it does mean the outcome generally isn’t guaranteed the way it is inside a protected window.
Do Any States Offer More Protection Than Federal Law?
Yes, in a number of states. Some states require insurers to offer Medigap policies year-round without health questions, and others provide an annual window, often tied to a birthday or policy anniversary, to switch plans without medical underwriting. These state rules change fairly often and vary widely in what they cover, so rather than relying on a general list, the most reliable path is to contact your State Insurance Department directly, or ask a SHIP counselor to check your state’s specific rules alongside the federal protections described here.
How to Use a Guaranteed Issue Right
- Confirm which situation applies to you, and hold onto any letter, notice, or email documenting when your prior coverage ended or is ending
- Apply for the new Medigap policy within the applicable window, generally as early as 60 days before your coverage ends or no later than 63 days after
- Choose a plan letter you’re eligible for under your specific guaranteed issue right; note that Plans C and F are no longer available to anyone newly eligible for Medicare on or after January 1, 2020
- Contact more than one insurance company, since benefits for a given plan letter are standardized, so price is generally the only difference between the same plan letter sold by different companies
- Consider a free consultation with your local SHIP counselor, who can help confirm your guaranteed issue right and walk through the application
Timing Is the Real Decision
Families often focus on comparing monthly premiums or plan benefits when they’re weighing whether to leave Medicare Advantage. But for anyone who might want a Medigap policy down the road, the more consequential decision is often when to make the switch, not just whether to. Acting inside a guaranteed issue window generally means a straightforward path back to Medigap, the outcome the caller above got by moving quickly. Waiting until a health change makes the decision urgent can mean facing medical underwriting at the worst possible time.
If you’re still weighing whether to leave Medicare Advantage at all, Senioridy’s guide on When Medicare Advantage Isn’t Enough: How and When to Switch Back to Original Medicare walks through the fuller decision, including cost considerations for people with ongoing health needs. And if your reason for switching connects to a specific life event, like a move or a lost employer plan, Senioridy’s guide to Medicare Advantage Special Enrollment Periods covers the enrollment windows that might apply to your situation.
For families exploring in-home care options alongside these coverage decisions, Senioridy’s directory of in-home senior care providers is a good place to start.
This article is for informational purposes only and does not constitute legal, financial, or medical advice. Guaranteed issue rules, application windows, and state-specific protections are subject to change. Medicare Advantage plans and Original Medicare with Medigap follow different coverage and cost-sharing rules, and this article’s guidance applies specifically to the switch between them. For free, personalized Medicare guidance, contact your State Health Insurance Assistance Program (SHIP) counselor at shiphelp.org, available in every state at no cost. Always confirm current requirements with official program representatives or your State Insurance Department.