Michigan Medicare open enrollment 2027
The dates that matter, the Michigan plans listed as leaving for 2027, and what to do now.
Medicare Open Enrollment starts October 15th
Take a look at Michigan plans, or go ahead and enroll yourself. Call if you need any help with your application.
The dates to know
- October 15 to December 7: Annual Enrollment Period. You can join, switch or leave a Medicare Advantage or Part D drug plan. New coverage starts January 1.
- January 1 to March 31: Medicare Advantage Open Enrollment. For people already in a Medicare Advantage plan, to switch plans or return to Original Medicare.
- If your plan is not renewing: people whose plan is not renewing generally get a Special Enrollment Period that runs from December 8 through the end of February. Confirm your own dates with your plan or with us.
- Turning 65: your Initial Enrollment Period is seven months, three months before your birthday month through three months after.
- Under 65? ACA marketplace open enrollment opens November 1. Closing dates differ by state and marketplace, so check HealthCare.gov (federal Marketplace) at its website or call us.
What is changing in Michigan for 2027
CMS’s files list 43 Medicare plans from 10 companies as not offered in at least one Michigan county for 2027. A plan can be listed because it was renumbered or replaced, so the list is a place to start, not a notice about your coverage. Your plan’s written notice is what tells you what is happening to it.
Medicare plans leaving Michigan for 2027
43 plans from 10 companies are listed in at least one Michigan county for 2026 but not for 2027, covering at least 136,320 people enrolled in county-by-county plans. Find your county to see the exact plans.
| Company | Plans leaving | People enrolled (at least) |
|---|---|---|
| Corewell Health | 6 | 74,377 |
| Humana | 7 | 30,475 |
| UnitedHealthcare | 10 | 18,334 |
| Wellcare / Ambetter (Centene) | 4 | 4,679 |
| Aetna (CVS Health) | 5 | 4,511 |
| MEDICAL MUTUAL OF OHIO | 4 | 2,818 |
| Blue Cross Blue Shield of Michigan Mutual Ins. | 1 | 1,115 |
| McLaren Health Care | 3 | 11 |
| Cigna HealthSpring (HCSC) | 2 (2 leave all of Michigan) | not listed |
| Molina Healthcare | 1 | not listed |
Where the most people are affected
- Wayne County · 20,166
- Oakland County · 7,290
- Kent County · 7,085
- Grand Traverse County · 6,951
- Macomb County · 6,598
- Newaygo County · 4,491
- Ottawa County · 3,569
- Kalamazoo County · 3,539
- Alpena County · 2,744
- Mason County · 2,601
Want every company and plan ID in one place? See the full Michigan plan-changes list on GetFastRates.com →
A plan can be listed because it was renumbered or replaced, not only because a company is leaving the state. When the same company keeps other plans there, members are usually moved to a replacement plan. Your plan should send you a notice, and Medicare’s Annual Enrollment Period (October 15 to December 7) is when you can compare and switch. “People enrolled” is the number enrolled in that plan today (CMS hides counts of 10 or fewer). Source: CMS Medicare Advantage and Part D landscape files for 2026 and 2027, and CMS enrollment data from September 2026.
What to do this week
- Find the letter from your Medicare plan about 2027. Plans must send written notice if they are not renewing, so check your mail and the member portal.
- Write down your doctors, your prescriptions with their doses, and your pharmacy. These decide which plan works for you.
- Look up your county. Plans are set by county, and two neighbors can have different choices. Find your Michigan county →
- Mark your dates: October 15 to December 7 for the Annual Enrollment Period.
- Talk it through. Call 855-367-1095 and a licensed agent will look at what is available where you live, or use the free counseling below.
Want every company and plan ID? See the full Michigan plan-changes list on GetFastRates.com →
Free Medicare counseling in Michigan
MMAP (Michigan Medicare/Medicaid Assistance Program) (800-803-7174) offers free, one-on-one help with Medicare choices that is not tied to an insurance company.
Important disclosure
We do not offer every plan available in your area. We represent a limited number of organizations, which offer a limited number of products in your area. Please contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Assistance Program to get information on all of your options.
Questions
When is Medicare open enrollment in Michigan?
Medicare's Annual Enrollment Period is the same in every state: October 15 to December 7, with new coverage starting January 1.
My plan is on the leaving list. Does that mean I lose coverage?
Not necessarily. A plan can be listed because it was renumbered or replaced, and a company often moves members to another of its plans. Your plan's written notice is what tells you what is happening, so check it and confirm with the plan.
Do I have to enroll in anything if I call?
No. A call is a conversation about your options. You are never required to enroll.
Is there free help in Michigan that is not tied to an insurance company?
Yes: MMAP (Michigan Medicare/Medicaid Assistance Program) (800-803-7174).
Talk with a licensed agent about Michigan coverage
Call Lander LLC to go over your options. There is no cost to call or to speak with an agent, and you are never required to enroll in anything.
Call 855-367-1095 Open 8 AM-10 PM Eastern timeReviewed by Richard Lander, licensed insurance agent (NPN 21255551), Lander LLC. Last updated October 3, 2026. This page is educational and is not a quote, an offer of coverage, or legal or tax advice.