Where to find the list
Company names change from year to year, so we keep them on one page built from CMS data: plans ending in 2027. It shows which plans and counties are affected, with the CMS files cited. Statewide, CMS lists 9 companies and 50 Medicare Advantage plans open to everyone in Oklahoma for 2027.
Rural Oklahoma is hit hardest. For 2027, no Medicare Advantage plan open to everyone is offered in Beaver, Cimarron, Ellis, Harmon, Harper, Roger Mills or Texas counties. See is Medicare Advantage available in every Oklahoma county.
How to tell if you're affected
| Letter or sign | What it means |
|---|---|
| Plan non-renewal notice | Your plan is leaving Medicare or your county. You must choose new coverage. |
| Annual Notice of Change | Your plan continues with changes for 2027. Review it. |
| Letter saying you'll be moved to a different plan from the same company | Your plan is being replaced. Check that the new plan covers your doctors and drugs. |
What to do if your plan is leaving
- Keep your letter. It proves your Special Enrollment Period and your Medigap guaranteed-issue right.
- Check your doctors and medicines. Make a list before you compare.
- Compare your options. Another Medicare Advantage plan in your county, or Original Medicare with Part D and Medigap. See plans for your ZIP code.
- Choose by December 31, 2026. Your coverage then starts January 1, 2027. The Special Enrollment Period runs through February 28, 2027, but later choices leave a gap.
Step-by-step help is on my plan is ending in 2027. To compare plans from the companies they work with, you can request a call from a licensed insurance agent. See also Medicare open enrollment in Oklahoma.
Related questions
When is open enrollment for 2027?
October 15 to December 7, 2026.
Can I switch after open enrollment?
Later windows to change.
Can I switch to Medigap?
Guaranteed-issue rights.
Sources
- CMS — Medicare Advantage and Part D contract and enrollment data (CY2027 Landscape file)
- Medicare.gov — Special Enrollment Periods (plan contract not renewed)
- Medicare.gov — Understanding Medicare Advantage Plans (Annual Notice of Change)
- Medicare.gov — When can I buy a Medigap policy?
More questions in this guide
- Can I go back to Original Medicare from Medicare Advantage?
- Can I switch Medicare Advantage plans after open enrollment ends?
- My Medicare Advantage plan is ending in 2027 in Oklahoma. What do I do?
- When is Medicare open enrollment in Oklahoma for 2027?
Part of the guide: Medicare Open Enrollment in Oklahoma (2027 Plans) · All questions
Frequently asked questions
How many companies offer Medicare Advantage in Oklahoma for 2027?
The CMS 2027 Landscape file lists 9 companies offering Medicare Advantage plans in Oklahoma. Which ones serve your area depends on your county.
Why do plans leave a county?
Each year a company decides which counties its plans will serve. A company may drop counties, end a plan, or merge plans. When a plan won't renew where you live, Medicare rules give you a Special Enrollment Period.
Is my Medigap policy affected?
No. This is about Medicare Advantage and Part D plans. A Medigap policy is guaranteed renewable as long as you pay the premium, even if the company stops selling it to new customers.
My plan sent a letter about changes, not ending. What now?
That's likely your Annual Notice of Change, which lists next year's changes to costs, networks and drug lists. Your plan continues unless you switch; use open enrollment, through December 7, to compare.
Medicare in your Oklahoma county
Plans, local agents and help, county by county: Oklahoma · Tulsa · Cleveland · Canadian · Comanche · Rogers · Wagoner · Payne · Pottawatomie · Creek · Muskogee · Garfield · Grady · Washington · Logan · Bryan · Le Flore · Carter · Cherokee · McClain · All 77 counties →