Is your Medicare Advantage plan ending in 2027?

A Medicare Supplement (Medigap) works alongside Original Medicare to help pay costs like deductibles and coinsurance. You can see any provider in the U.S. that accepts Medicare, with no network. If your Medicare Advantage plan is ending, Oklahoma rules give you a time-limited right to buy one without health questions.

What is changing in Oklahoma County for 2027

• Based on CMS plan files, 6 Medicare Advantage plans offered in Oklahoma County in 2026 are not offered there in 2027. About 670 people were enrolled in them as of October 2026.
• 3 more plans are being replaced, and their members (about 7,200 people) are moved into another plan from the same company.
• Nearby counties are affected too, including Logan and Canadian counties.

Your plan mails you a letter if it is ending, or an Annual Notice of Change if it is being replaced. Check that letter to see which applies to you.

Your Medicare Supplement guaranteed-issue right

Under Oklahoma rule OAC 365:10-5-129.1, if your Medicare Advantage plan stops offering coverage where you live, a Medicare Supplement company can't turn you down, add a pre-existing condition exclusion or charge more because of your health for certain plans, as long as you apply in time.

• The window generally starts when you get the notice that your plan is ending.
• It ends 63 days after your plan coverage ends.
• Keep the letter from your plan. You'll need it as proof when you apply.
• This right applies to plans ending. If your plan is being replaced by another plan from the same company, this right generally does not apply.

Key dates

• October 15 to December 7, 2026: Annual Enrollment. A change made by December 7 starts January 1, 2027.
• Through February 28, 2027: if your plan is ending, you have a Special Enrollment Period to pick new coverage.
• If you don't choose anything, you'll have Original Medicare on January 1, 2027. If your plan included drug coverage, you'd need separate Part D coverage to avoid a gap.

Is a Medicare Supplement right for you?

It depends on your doctors, budget and prescriptions. In a call, I can explain how a Medicare Supplement with a separate Part D plan compares with other options, so you can decide what fits.

Sources: Is My Plan Ending? Oklahoma County 2027 (CMS CY2027 Landscape, Crosswalk and October 2026 enrollment); Oklahoma 2027 Medicare Advantage plan changes by county; Oklahoma Insurance Department, OAC 365:10-5-129.1. For information straight from Medicare, visit Medicare.gov or call 1-800-MEDICARE (TTY 1-877-486-2048). The Oklahoma Medicare Assistance Program (SHIP) can also help at 800-763-2828.