When Can I Change My Medicare Supplement Plan for 2026? Key Dates and Rules

There is no annual enrollment period for Medigap switches

This trips people up constantly. Medicare Advantage and Part D use the October 15 through December 7 open enrollment window. Medigap doesn't.

Your one federal right to buy any Medigap plan without health screening is the 6-month Medigap Open Enrollment Period. It starts the month you turn 65 and are enrolled in Part B. After that window closes, switching rules change dramatically.

Guaranteed-issue rights that let you change without underwriting

Federal law gives you the right to buy a Medigap plan without medical questions in specific situations:

• Your Medicare Advantage plan leaves your area or stops participating in Medicare
• You lose employer or union group coverage
• Your Medigap carrier goes bankrupt or violates its contract
• You moved out of your plan's service area (Medicare SELECT policies)
• You tried Medicare Advantage for the first time and want to return to Original Medicare within 12 months

Some states offer additional protections beyond federal rules. Rules vary by state, so call to confirm what applies where you live.

How medical underwriting works if you switch outside a protected window

Outside your open enrollment period or a guaranteed-issue event, insurers can ask about your health history. They can deny coverage, charge more, or exclude pre-existing conditions.

That said, many people in decent health pass underwriting without issues. If you're relatively healthy and your current carrier raised rates 10-18% in a single year, switching to a more stable carrier can save you thousands over time. The application takes about 15 minutes.

Steps to switch your Medigap plan before 2026 rates take effect

1. Compare rates from multiple carriers for the same plan letter (Plan G from one company covers the same benefits as Plan G from another)
2. Apply to the new carrier while keeping your current plan active
3. Wait for approval from the new company
4. Use your 30-day free-look period to confirm you're satisfied
5. Cancel your old policy only after the new one is active

Never cancel your existing Medigap plan before your new one is confirmed in writing. You'll pay both premiums for one overlapping month. That's normal.

Why the carrier matters more than the plan letter

People focus on the starting premium. That's the wrong number to watch. What matters is long-term rate behavior. Some carriers price low to attract new members, then raise rates aggressively once the pool ages.

A $20/month difference at age 65 can become a $100/month gap by 78. I look at carrier rate history before recommending any switch. That's something you won't find on a comparison website.

Free help comparing your options

I'm Anthony Orner, a licensed Medicare broker. I work with dozens of Medigap carriers and there's no cost to you for my help. Carriers pay me the same regardless of which one you choose, so my only job is finding you the best long-term fit. One call, and I'll tell you exactly where you stand and whether switching makes financial sense before 2026.

Related resources

• Medicare Supplement Plan G: What It Covers and Costs
• Medigap Open Enrollment Period: Your One Best Window
• Medicare Supplement vs. Medicare Advantage: Which Is Right for You?
• Medicare Part B Enrollment: Deadlines and Penalties