Medicare Trial Right: Protect Your 12-Month Medigap Window in Colorado

The Medicare Advantage trial right gives eligible beneficiaries a one-time, 12-month chance to try Part C and still buy a Medigap policy without medical underwriting if they return to Original Medicare. Acting fast matters: check your Medicare Advantage effective date today, then mark your calendar for the 12-month deadline and the window for applying to Medigap. Missing these dates can cost you guaranteed-issue protection for good.

TL;DR:

• The right applies only to your first Medicare Advantage enrollment, either at age 65 as your first coverage or after dropping Medigap to join.
• Your application window runs from 60 days before Medicare Advantage coverage ends through 63 days afterward; align the Medigap start date with termination to avoid gaps.
• People newly eligible for Medicare on or after January 1, 2020 generally cannot buy Plans C or F, while Plans G and N remain options.
• Although Medigap benefits are standardized by plan letter, premiums differ by insurer, so compare quotes from several carriers rather than choosing the first offer.
• Insurers may request enrollment, termination, and prior Medigap records; Colorado residents should also check whether state rules extend federal protections.

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Table of Contents

• What the trial right covers and how it differs from other enrollment periods
• Who is eligible: the scenarios that trigger this protection
• Deadlines and timing: the 12-month clock and application windows
• Step-by-step: how to exercise the trial right and buy Medigap
• Which Medigap plans you can buy and what to know about pricing
• State differences, documentation, and common pitfalls to avoid
• How local guidance makes the trial right easier to use
• Get help from a licensed Colorado Medicare broker
• FAQ
• Authoritative Medicare sources and state contacts

What the trial right covers and how it differs from other enrollment periods

The trial right comes from federal Medicare rules tied specifically to your first-ever enrollment in a Medicare Advantage plan. It only applies once in your lifetime, even if you later join another MA plan.

Within this window, “guaranteed issue” means an insurer must sell you a Medigap policy regardless of health conditions, with no medical underwriting and no coverage exclusions for pre-existing conditions. This protection does not exist during most other enrollment windows.

That’s why it’s easy to confuse the trial right with the Medicare Advantage Open Enrollment Period, which runs January 1 through March 31 each year. The two serve different purposes:

• MA OEP lets you switch MA plans or return to Original Medicare, but it does not guarantee you can buy Medigap without underwriting.
• The trial right specifically protects your ability to buy Medigap after leaving an MA plan you joined for the first time.
• Special Enrollment Periods cover other life events entirely and run on their own separate timelines, according to Medicare’s enrollment guidance.

Who is eligible: the scenarios that trigger this protection

Two main situations trigger the trial right, and recognizing which one applies to you is the first step toward using it correctly.

1. You turned 65, enrolled in a Medicare Advantage plan as your first Medicare coverage, and decide within 12 months that you’d rather have Original Medicare with a Medigap policy.
2. You had a Medigap policy already, dropped it to join a Medicare Advantage plan or Medicare SELECT policy for the first time, and want to switch back within your first year.

Both scenarios share the same one-time nature: once you’ve used your trial right, later MA enrollments don’t reset the clock, so consider options like mobile blood draws in Fresno to conveniently manage your medical documentation needs. This makes your original enrollment and disenrollment paperwork essential evidence if an insurer ever questions your eligibility. Keep copies of everything from your plan’s welcome letter to your enrollment confirmation, since these records are often the only proof you have that you qualify for guaranteed issue.

Deadlines and timing: the 12-month clock and application windows

Your 12-month trial period starts on the effective date of your first Medicare Advantage plan, not the date you signed up or decided to join. That date is the anchor for everything that follows.

According to Medicare’s official enrollment periods guide, you can apply for a Medigap policy starting shortly before your Medicare Advantage coverage ends and up to about two months after it ends. This window exists to let you line up Medigap coverage before you actually lose your MA plan.

Practical steps for staying on schedule:

• Write your MA effective date on a calendar the day you enroll.
• Set a reminder 10 months in, giving yourself a two-month buffer to start the Medigap application process.
• Confirm your chosen Medigap effective date starts the same day your MA coverage ends, avoiding any gap or overlap.

Missing the 63-day mark after disenrollment typically closes the guaranteed-issue window for good.

Step-by-step: how to exercise the trial right and buy Medigap

Follow these steps in order to protect your guaranteed-issue rights:

1. Confirm your original MA effective date using your enrollment confirmation letter or by calling 1-800-MEDICARE.
2. Set calendar reminders well before the 12-month mark so you have time to act within the application window.
3. Gather documentation: your MA enrollment letter, any plan notices, and your prior Medigap policy information if you’re repurchasing.
4. Contact a licensed insurance broker or a Medigap insurer directly to request a guaranteed-issue sale, and ask them to coordinate your effective date with your MA termination date.
5. Submit your application between 60 days before and 63 days after your MA coverage ends, confirming in writing that the insurer will start your Medigap policy the day your MA plan ends.
6. If you’ve missed the window, contact your State Insurance Department, your local State Health Insurance Assistance Program (SHIP), and 1-800-MEDICARE to ask about any remaining options.

Pro Tip: Request written confirmation of your guaranteed-issue status from the Medigap insurer before you officially disenroll from your Medicare Advantage plan.

Which Medigap plans you can buy and what to know about pricing

Under guaranteed issue, you typically have access to Medigap Plans A, B, C, D, F, G, K, L, M, and N, depending on when you became eligible for Medicare. There’s one key exception: Plans C and F are generally not available if you became newly eligible for Medicare on or after January 1, 2020.

High-deductible Plan G remains an option in many states. With this version, you pay out-of-pocket costs up to a set deductible amount before the policy begins paying benefits, which typically means a lower monthly premium in exchange for more upfront cost-sharing.

Here’s what matters most when comparing your options:

• Medigap benefits are standardized by letter, so a Plan G policy covers the same benefits no matter which insurer sells it.
• Premiums for the same lettered plan can vary significantly between insurance companies.
• Comparing prices across multiple carriers, rather than assuming one insurer offers the best deal, is the only way to find real savings on identical coverage.

Our guide to Medicare Supplement costs in Colorado breaks down how these standardized benefits translate into real premium differences locally.

State differences, documentation, and common pitfalls to avoid

Federal law sets the floor for guaranteed-issue rights, but states can extend broader protections. Colorado residents should check with the Colorado Division of Insurance for any state-specific rules that go beyond the federal trial right.

Insurers typically ask for:

• Your Medicare Advantage enrollment and disenrollment letters.
• A plan termination notice showing your coverage end date.
• Prior Medigap policy details if you’re repurchasing coverage you once had.

The most common mistakes we see are applying for Medigap too early or too late, assuming that MA OEP alone guarantees Medigap issue, and throwing away enrollment paperwork before it’s needed.

Pro Tip: Scan and save every Medicare-related letter you receive, even ones that look routine. You won’t know which document matters until an insurer asks for it.

How local guidance makes the trial right easier to use

We provide assistance to verify Medicare Advantage effective dates, gather documentation, and compare Medigap premiums to help clients manage their guaranteed-issue window. Coordinating effective dates between a terminating MA plan and a new Medigap policy is detail work, and getting it wrong can mean a coverage gap or a denied application.

Annual reviews matter here too: checking in each year helps catch situations where a client’s circumstances have changed before a protection like this quietly expires.

— Zach

Get help from a licensed Colorado Medicare broker

We assist residents in the local area with understanding whether the trial right applies to them and how to use it before the opportunity expires. Our services cover Medicare planning, Medicare Advantage consultations, and Medigap quote comparisons across multiple carriers, all independent of any single insurance company.

Before a consultation, it helps to bring:

• Your Medicare Advantage enrollment confirmation and effective date.
• Any Medigap policy letters you’ve received.
• A list of the plan letters you’re considering, such as Plan G or Plan N.

Visit our Medigap plans page for Castle Pines to request a quote or schedule a time to talk through your options before your window closes.

This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.

FAQ

What happens if I miss the trial right deadline?

If you miss the 63-day window after your Medicare Advantage coverage ends, you generally lose guaranteed-issue rights for Medigap and may face medical underwriting. Contact your State Insurance Department or local SHIP office to ask whether any state-specific protections still apply to your situation.

Can I use the trial right more than once?

No, the Medicare Advantage trial right is a one-time protection tied to your first-ever enrollment in an MA plan. Later MA enrollments do not reset or renew this right, which is why keeping your original enrollment records matters.

Are all Medicare Supplement Plan G policies the same?

Plan G benefits are standardized, meaning every insurer selling Plan G in a given state must offer the same covered benefits. Premiums for identical Plan G coverage can vary widely between companies, so comparing quotes from multiple insurers is worth the time.

Why might someone decide to leave a Medicare Advantage plan?

Reasons vary by individual circumstances, including network restrictions, out-of-pocket costs, or wanting broader provider access under Original Medicare with a Medigap policy. The trial right exists specifically to protect people making this switch without facing medical underwriting on a new Medigap policy.

How long does a Medicare benefit period last?

A Medicare benefit period is tied to inpatient hospital stays, not to Medicare Advantage or Medigap enrollment timelines, and ends after you’ve been out of the hospital or a skilled nursing facility for 60 days in a row. This is separate from the 12-month Medicare Advantage trial right discussed throughout this guide.

Authoritative Medicare sources and state contacts

For official details, consult Medicare’s guide to choosing a Medigap policy and the enrollment periods publication linked above. Call 1-800-MEDICARE or your local SHIP office for personalized help, and reach out to the Colorado Division of Insurance for state-specific guaranteed-issue rules.

Recommended

• Medicare Supplement Insurance in Colorado: Plans, Costs & En
• Medigap Plans in Castle Pines, CO
• Medicare Costs in Colorado: What You’ll Pay & How to Save
• Avoid Gaps When Changing Medicare Advantage in Colorado