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Medicare Supplement Insurance
Last updated: 22 September 2026
A Medigap trial right can protect you when you try Medicare Advantage and return to Original Medicare. The protection is narrow: match the right situation, meet the deadline, and keep proof.
Bottom Line
If you are thinking about leaving Medicare Advantage, check your Medigap right before you make the switch. Federal trial rights generally protect two first-time situations for up to 12 months. Medicare’s 2026 guide says the Medigap application window can begin 60 days before coverage ends and normally closes no more than 63 days after it ends. State law may give you more protection.
Start Here
- Find your Medicare Advantage start date. Use the effective date on your plan records, not the date you talked with an agent.
- Ask which right applies. Call your local SHIP counselor or 1-800-MEDICARE (1-800-633-4227). Ask whether you have a trial right, another guaranteed-issue right, or only a plan-change right.
- Check Medigap and Part D together. Do not assume that returning to Original Medicare automatically solves Medigap or prescription-drug coverage.
GFS also explains how to get free counseling in its SHIP and SMP guide.
Quick Reference
| Your situation | Possible federal protection | First action | Main risk |
|---|---|---|---|
| You joined Medicare Advantage when first eligible for Part A at 65 and are still in the first year | Trial right | Confirm the 12-month end date | Waiting until the Medigap window closes |
| You dropped Medigap to try Medicare Advantage for the first time | Trial right to return | Call the former Medigap insurer | Assuming any policy is available |
| Your Medicare Advantage plan is leaving Medicare, stops serving your area, or you move out of its service area | Guaranteed issue | Save the plan notice | Losing proof or missing the deadline |
| Your plan’s provider network has a significant change | Guaranteed issue may apply | Ask for written documentation | Switching plans instead of Original Medicare |
| You are leaving during a normal Medicare enrollment period | Not automatic | Check Medigap rights separately | Confusing a Medicare change window with a Medigap right |
What Has Changed
The 2026 official Medicare Medigap guide now clearly lists a significant Medicare Advantage network change among common federal guaranteed-issue situations when a person returns to Original Medicare. This update also makes the two trial rights, the 60-day-before and 63-day-after Medigap application windows, and the separate Part D step easier to distinguish.
Medicare’s 2026 Medigap guide is the main federal source for these protections.
What the Medigap Trial Right Does
Medigap, also called Medicare Supplement Insurance, works with Original Medicare. It helps pay some of the deductibles, copayments, and coinsurance that Original Medicare leaves to you. Medicare Advantage is different. It is another way to receive Medicare benefits, usually through a private plan with its own network and cost rules.
Federal law gives some people a limited chance to try Medicare Advantage and then return to Original Medicare without losing all access to Medigap. Medicare calls this a trial right. The key idea is that it is not a general right to change your mind at any time.
Medicare’s current Medigap rules describe a single 12-month trial period when you drop a Medigap policy to join Medicare Advantage for the first time. The same page also describes the first-year right for people who joined Medicare Advantage when first eligible for Part A at age 65.
Outside a Medigap open-enrollment or guaranteed-issue protection, an insurer may use medical underwriting where state law allows it. That can mean health questions, a higher price based on health status where allowed, or a denial. Medicare’s Medigap buying steps explain that proof of a guaranteed-issue right can stop an insurer from using medical answers to deny the policy or change the price.
The Two Main Federal Trial Rights
| Trial right | Who fits | What you may buy | Medigap timing |
|---|---|---|---|
| First Medicare Advantage try at 65 | You joined Medicare Advantage or PACE when first eligible for Medicare Part A at 65 and want Original Medicare within the first year. | Any Medigap policy sold in your state that you are legally eligible to buy. | From 60 days before coverage ends through no more than 63 days after it ends. |
| Dropped Medigap to try Medicare Advantage | You dropped Medigap to join Medicare Advantage for the first time, have been in the plan less than a year, and want to return. | Your former policy if the same insurer still sells it. If not, a limited federal replacement choice applies. | From 60 days before coverage ends through no more than 63 days after it ends. |
For the first type, Medicare’s 2026 guide says you can buy any Medigap policy sold by an insurer in your state, subject to the federal rule that Plans C and F are generally unavailable to people new to Medicare on or after January 1, 2020.
For the second type, ask first for the exact Medigap policy you had before. If the same company no longer sells it, the 2026 guide lists a fallback right to Plans A, B, C, D, F, or G sold in your state, again subject to the post-2020 limits on Plans C and F. Massachusetts, Minnesota, and Wisconsin standardize Medigap differently, so use your state rules there.
Do not wait until day 63 to start. Medicare notes that trial rights may last an extra 12 months in certain circumstances, but that is an exception to confirm with your State Insurance Department, not a deadline to rely on.
Other Guaranteed-Issue Rights Can Matter More
A senior may qualify for a Medigap guaranteed-issue right even when a trial right does not apply. This matters because the reason you are leaving Medicare Advantage can change your Medigap protection.
The 2026 Medicare guide lists common federal guaranteed-issue situations when your Medicare Advantage plan leaves Medicare, stops giving care in your area, you move outside its service area, or the plan’s network has a significant change. These protections apply when you switch to Original Medicare instead of another Medicare Advantage plan.
That network-change rule is especially important. A plan may also give you a Medicare Special Enrollment Period after a significant network change. Medicare’s special enrollment rules explain plan-change rights, while the Medigap guide explains the separate supplement protection. Ask about both.
Federal law also protects some people when a Medigap company goes bankrupt, coverage ends through no fault of the policyholder, or a Medicare Advantage or Medigap company did not follow the rules or misled the person. If your problem involves a denial of Medicare Advantage care rather than the right to leave the plan, use the GFS Medicare Advantage appeals guide before assuming a coverage switch is the only solution.
Check the Dates and Keep Proof
Write down the Medicare Advantage effective date, the planned end date, and the Medigap application date. These dates are more useful than the date you spoke with a salesperson or decided you were unhappy.
Medicare’s Medigap rights tool says many protected situations allow an application starting 60 days before the old coverage ends and no more than 63 days after it ends. Some guaranteed-issue situations use a notice date or another trigger, so read the plan letter closely.
Keep these records
- Medicare Advantage welcome letter or enrollment confirmation.
- Plan termination, service-area, or network-change notice.
- The postmarked envelope that carried the notice.
- Your old Medigap policy, card, premium statement, or cancellation record.
- Medigap application and confirmation number.
- Any insurer denial or request for medical underwriting.
- A call log with date, time, office, name, and reference number.
Medicare specifically advises keeping letters, notices, emails, claim denials, and the postmarked envelope because you may need them to prove a guaranteed-issue right.
Leaving Medicare Advantage Is Not the Same as Buying Medigap
| Window | What it lets you do | Does it guarantee Medigap? |
|---|---|---|
| Oct. 15-Dec. 7 Open Enrollment | Change Medicare Advantage or Part D coverage, including a return to Original Medicare. | No. A separate Medigap right must apply. |
| Jan. 1-Mar. 31 MA Open Enrollment | If already in Medicare Advantage, switch plans or return to Original Medicare and join a separate drug plan. | No. Check trial, guaranteed-issue, open-enrollment, or state rights. |
| Special Enrollment Period | Make a change after certain life or plan events. | Sometimes. The Medigap rule must be checked separately. |
| Medigap trial right | Leave Medicare Advantage during the protected first-time period and return to Original Medicare. | Yes, if your facts fit. |
Medicare’s plan enrollment page gives the current October 15-December 7 and January 1-March 31 rules. These Medicare windows are not a substitute for checking Medigap eligibility.
Do not cancel first and shop later. If your Medigap right is uncertain, get a written answer or application decision before you create a gap you cannot easily reverse.
How to Start Without Wasting Time
- Confirm your right. Ask SHIP, Medicare, and the insurer which federal or state protection applies.
- Get the exact end date. Ask when Medicare Advantage ends and when Original Medicare will be active.
- Shop the Medigap option you can actually buy. Use Medicare’s Medigap plan finder and compare the same lettered plan across insurers where standard plan letters apply.
- Apply during the protected window. Tell the insurer you are applying under a guaranteed-issue or trial right and ask what proof to send.
- Coordinate the effective dates. Medigap cannot pay Medicare Advantage cost sharing. The supplement should start with Original Medicare, not while Medicare Advantage is still your active Medicare coverage.
- Handle drug coverage. If your Medicare Advantage plan included Part D, confirm your separate Part D enrollment opportunity before the old drug coverage ends.
- Check the first bill and card. A missed Medigap, Part D, or Medicare premium can create a new problem. The GFS Medicare premium bill guide explains what to check.
When you apply, ask the insurer to note the guaranteed-issue basis on the application. Do not rely only on a phone promise. If an agent says the company must use medical underwriting, ask the company to review your proof before you accept that answer.
Do Not Lose Prescription Drug Coverage
Modern Medigap policies do not include Part D drug coverage. If your Medicare Advantage plan includes prescriptions, returning to Original Medicare may leave you needing a stand-alone Medicare drug plan.
Medicare says people using a trial-right situation may also have an opportunity to join a Medicare drug plan. The exact route depends on how and when you leave Medicare Advantage, so confirm it before disenrollment. During the Medicare Advantage Open Enrollment Period, Medicare specifically allows a person who returns to Original Medicare to join a separate drug plan.
Use Medicare’s Part D switching rules and Plan Compare to check your medications and pharmacy. If you go 63 days or more without creditable drug coverage, Medicare says you may owe a Part D late enrollment penalty. The penalty is generally 1% of the national base beneficiary premium for each uncovered month. The GFS late penalty guide explains the other Medicare penalties too.
If drug costs are hard to afford, check the GFS Extra Help guide. People with Medicaid or Extra Help may have additional drug-plan change rights; Medicare applies special eligibility rules.
State Rules Can Give You More Protection
Federal law is the floor, not always the full answer. States may add Medigap enrollment rights, limit underwriting, or require companies to sell policies in more situations. Use the state insurance directory to find the regulator that handles Medigap in your state.
This is especially important if you are under 65. Medicare’s 2026 guide says federal law generally does not require insurers to sell Medigap to people under 65, although some federal guaranteed-issue rights can apply and many states require at least one policy to be offered. When you turn 65, you generally get a new six-month Medigap Open Enrollment Period based on Part B.
Massachusetts, Minnesota, and Wisconsin also use different Medigap standardization systems. Do not assume the plan letters used in most states describe your choices there.
If you live in Minnesota or Wisconsin and are reviewing your wider retirement budget while comparing coverage, the GFS Minnesota senior tax guide and Wisconsin senior tax guide cover state tax rules separately.
If you are also planning for assisted living in Wisconsin, the GFS Wisconsin assisted living guide covers that separate cost-planning question.
If cost is the reason you are leaving a plan or cannot afford a supplement, check whether a Medicare Savings Program may help with Medicare costs before dropping coverage you still need.
Reality Checks
- A 12-month trial right is not a 12-month Medigap application window. The Medigap application timing is much shorter around the end of coverage.
- Guaranteed issue does not mean every plan is available. The policy choices depend on the reason for the right, your Medicare eligibility date, state law, and what insurers sell.
- Returning to Original Medicare changes how you get care. Confirm that your doctors take Medicare and understand the separate Medigap and Part D premiums.
- Premiums can change. Guaranteed issue protects access and health underwriting in the covered situation; it does not freeze the premium forever.
- State rules can be better than federal rules. A federal “no” is not always the final answer.
Common Mistakes to Avoid
- Counting from the sales call. Use the plan effective date.
- Assuming Open Enrollment equals Medigap protection. These are different rules.
- Waiting until after disenrollment. Start the Medigap check before coverage ends when possible.
- Throwing away notices. A notice or postmark may be the proof that protects your application.
- Forgetting Part D. Medigap does not replace prescription-drug coverage.
- Assuming “any Medigap” in every situation. Trial right #2 and other guaranteed-issue events can have narrower plan choices.
- Ignoring state protections. Your state may give you a better route.
Denied, Delayed, or Overwhelmed
If the insurer says no
Ask for the reason in writing. Ask, “Was my application reviewed as guaranteed issue?” Send the plan notice, postmarked envelope, old Medigap records, and any Medicare confirmation. Then contact SHIP and the State Insurance Department.
If the Medicare dates do not match
Call the Medicare Advantage plan and 1-800-MEDICARE. Ask for the plan start date, plan end date, and Original Medicare effective date. Keep reference numbers for both calls.
If care is ending during the switch
Do not wait for the coverage change if a hospital, skilled nursing facility, home health agency, hospice, or rehabilitation provider is ending covered services. The GFS Medicare fast appeals guide explains the separate urgent appeal path.
If the problem started with a retiree plan
Employer or union coverage ending can create a different Medigap guaranteed-issue right. The GFS retiree coverage guide can help you organize that transition.
Official Resources
- Medigap change rules — federal switching and guaranteed-issue guidance.
- Medicare rights help — where to get help with Medicare rights and protections.
- Medicare penalty rules — current Part B and Part D penalty information.
- Local SHIP help — free, unbiased Medicare counseling.
Phone Scripts
For SHIP
“I joined Medicare Advantage on [date]. I want to return to Original Medicare. Can you tell me whether I have a Medigap trial right or another guaranteed-issue right, and what dates I must meet?”
For the Medigap insurer
“I am applying under a guaranteed-issue right. What policy can I buy, what proof do you need, and what effective date should I request? Please note the guaranteed-issue reason on my application.”
For Medicare
“Please confirm my Medicare Advantage end date, when Original Medicare will start, and whether I have an enrollment opportunity for a stand-alone Part D plan when I leave.”
After a denial
“Please send the denial reason in writing and tell me whether my application was reviewed under my claimed guaranteed-issue right. What document was missing or what rule did you use?”
Resumen en Español
Lo más importante: el derecho de prueba de Medigap es una protección federal limitada para ciertas personas que prueban Medicare Advantage y luego regresan a Medicare Original. No significa que pueda cambiar en cualquier momento.
Revise la fecha exacta en que empezó Medicare Advantage. En los dos derechos de prueba principales, la protección normalmente se relaciona con los primeros 12 meses. La guía de Medicare de 2026 indica que la solicitud de Medigap puede empezar 60 días antes de que termine la cobertura y normalmente debe presentarse a más tardar 63 días después.
Guarde cartas, avisos, correos electrónicos, sobres con matasellos y documentos de su póliza anterior. Si su plan tenía medicamentos, confirme también cómo inscribirse en la Parte D. Para ayuda gratis, llame a SHIP o a 1-800-MEDICARE. Si una compañía niega la póliza, pida la razón por escrito y comuníquese con el departamento de seguros de su estado.
FAQ
What is the Medigap trial right?
The Medigap trial right is a federal guaranteed-issue protection for certain people who try Medicare Advantage and then return to Original Medicare. The two main trial-right situations have a 12-month first-time rule, but the Medigap policy choices differ.
How long does the Medigap trial right last?
The Medicare Advantage trial period generally lasts 12 months after you join Medicare Advantage for the first time. For the Medigap application itself, Medicare’s 2026 guide says the protected window can begin 60 days before the old coverage ends and normally closes no more than 63 days after it ends.
Does Medicare Open Enrollment guarantee Medigap?
No. The October 15 to December 7 Medicare Open Enrollment Period can let you return to Original Medicare, but it does not by itself force a Medigap company to sell you a policy. You need a separate Medigap open-enrollment or guaranteed-issue right, or a state protection.
What if I dropped Medigap to try Medicare Advantage?
If this was your first time joining Medicare Advantage and you are still within the trial period, you may have the right to get your former Medigap policy back if the same company still sells it. If that policy is unavailable, federal rules provide a more limited replacement right, subject to the plan choices allowed for your Medicare eligibility date and state.
Can a major network change give Medigap rights?
Yes, in the 2026 Medicare Medigap guide a significant Medicare Advantage network change is listed among common federal guaranteed-issue situations. The right applies when you switch to Original Medicare rather than another Medicare Advantage plan, and timing and proof still matter.
Do I need Part D after leaving Medicare Advantage?
If your Medicare Advantage plan included drug coverage, Medigap will not replace that coverage. You may need a stand-alone Medicare Part D plan or other creditable drug coverage. Confirm the enrollment route before leaving the old plan so you do not create a drug-coverage gap.
What if I am under 65 and have Medicare?
Federal law generally does not require Medigap companies to sell policies to people under 65, although some federal guaranteed-issue rights can still apply and many states add protections. Check your State Insurance Department and SHIP before relying on a trial-right strategy.
Who should I call if a Medigap company denies me?
Ask the insurer for the reason in writing and whether your application was reviewed as guaranteed issue. Then contact your local SHIP and your State Insurance Department. Keep the plan notice, postmarked envelope, prior policy records, application, and denial letter.
About This Guide
Sources: This guide uses official federal, state, local, and other high-trust nonprofit and community sources linked in the article.
Editorial note
This guide is produced under the GFS Editorial Standards using official and other high-trust sources. GFS is not affiliated with a government agency and is not a substitute for official agency guidance. Individual eligibility outcomes cannot be guaranteed.
Corrections
Despite careful verification, errors may occur. Readers may email info@grantsforseniors.org with corrections.
Disclaimer
This article is for informational purposes only and is not legal, financial, medical, tax, disability-rights, immigration, or government-agency advice. Program rules, policies, funding, and availability can change. Readers should confirm current details directly with the responsible official program before acting.
Last updated: 22 September 2026 · Next review: 22 January 2027
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