Medicare Advantage
January 1 to March 31: Medicare Advantage in Sterling Heights
STERLING HEIGHTS, Mich. — The new plan year is almost here, and with it comes a short second chance. From January 1 through March 31, 2027, people already enrolled in a Medicare Advantage plan can make one change if the coverage they picked during fall enrollment isn't working out. This window — the Medicare Advantage Open Enrollment Period — closes at the end of March and won't reopen until January 2028 for most people.
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Key takeaways
- The Medicare Advantage Open Enrollment Period runs January 1 through March 31 each year and allows one plan change.
- This window is only for people already in a Medicare Advantage plan on January 1; those with only Original Medicare can't use it to join an Advantage plan.
- Miss the March 31 deadline and you'll generally have to wait until the fall Annual Enrollment Period (October 15–December 7) to switch again.
- Certain life events — like moving out of Macomb County — can trigger a Special Enrollment Period outside these dates.
What this window actually lets you do
If you were enrolled in a Medicare Advantage plan as of January 1, you can use this period to:
- Switch to a different Medicare Advantage plan (with or without drug coverage).
- Drop your Medicare Advantage plan and return to Original Medicare (Parts A and B).
- If you drop back to Original Medicare, add a standalone Part D prescription drug plan.
That's it. You get one change during this window, and it takes effect the first day of the month after the plan receives your request.
What it does NOT let you do
This is where readers most often trip up. The Medicare Advantage Open Enrollment Period is not a free-for-all. During January through March, you cannot:
- Join a Medicare Advantage plan for the first time if you only have Original Medicare.
- Switch from one standalone Part D drug plan to another.
- Add drug coverage if you're staying on Original Medicare without also making an eligible change.
If any of those describe you, your next real chance is the fall Annual Enrollment Period, October 15 through December 7, with coverage starting January 1.
How the calendar fits together
Here's the timing at a glance, and why it matters if you live in Sterling Heights or anywhere else in Macomb County:
- October 15 – December 7 (Annual Enrollment Period): Anyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan. Changes start January 1.
- January 1 – March 31 (Medicare Advantage Open Enrollment): One change allowed, and only for current Medicare Advantage members.
- Special Enrollment Periods: Triggered by specific life events — moving to a new address that changes your plan's service area, losing employer coverage, entering or leaving a nursing facility, or qualifying for Extra Help, among others.
Sterling Heights is in Macomb County, where plan choices, provider networks, and pharmacy lists are set at the county level. If you move even a short distance across a county line, your options can change and a Special Enrollment Period may open.
What happens if you miss March 31
If March 31 comes and goes and you're unhappy with your Medicare Advantage plan, you're generally locked in for the rest of the year. There are exceptions:
- A qualifying life event opens a Special Enrollment Period.
- You qualify for Extra Help with drug costs or are enrolled in both Medicare and Medicaid — these groups often have added opportunities to switch.
- You're in the first three months of your Initial Enrollment Period around your 65th birthday.
Otherwise, plan to revisit your choice during the fall Annual Enrollment Period.
By the numbers
Medicare Part B premium, 2006–2026
The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.
Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.
By the numbers
How people get Medicare in Macomb County
(MA penetration in Macomb County)
MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.
Program-level changes worth knowing for 2027
Even if you don't switch plans, a few Medicare-wide rules take effect that shape drug costs in the new year:
- The Part D out-of-pocket cap is $2,100 in 2026. Once your covered drug spending hits that ceiling, you pay $0 for covered drugs the rest of the year.
- The Part D maximum deductible is $615.
- The old coverage gap (the "donut hole") was eliminated as of 2025 — Part D now has three phases.
- The Medicare Prescription Payment Plan lets you spread out-of-pocket drug costs across the calendar year in monthly installments instead of paying at the pharmacy counter.
- IRMAA income surcharges for Part B and Part D begin above $109,000 for a single filer in 2026.
These apply regardless of which plan you're in, so review your Annual Notice of Change letter with them in mind.
Before you make a move
A few practical steps before you switch:
1. Re-read the Annual Notice of Change your plan mailed this fall — it lists what's different for 2027. 2. Confirm your doctors, hospitals, and preferred pharmacies are still in-network. 3. Check that every prescription you take is still on the plan's formulary. 4. If you take costly medications, ask about the Medicare Prescription Payment Plan.
Where to get unbiased help
For personalized answers, use the official sources:
- Medicare.gov — the Plan Finder tool lets you compare plans available in Macomb County using your own drug list.
- 1-800-MEDICARE (1-800-633-4227), available 24/7.
- Michigan's State Health Insurance Assistance Program (SHIP), called MMAP in Michigan — free, one-on-one counseling from trained volunteers with no ties to any insurance company. Reach MMAP at 1-800-803-7174.
Key dates
Medicare enrollment periods at a glance
- Around your 65thInitial Enrollment PeriodA 7-month window around the month you turn 65 — your first chance to sign up.
- October 15 – December 7Annual Enrollment PeriodAnyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan.
- January 1 – March 31Medicare Advantage Open EnrollmentIf you're already in a Medicare Advantage plan, you can make one change.
- January 1 – March 31General Enrollment PeriodFor people who missed their first chance to sign up for Part B.
- VariesSpecial Enrollment PeriodTriggered by life events like moving or losing other coverage.
Dates are set by Medicare and apply nationwide. Confirm your personal windows at Medicare.gov or 1-800-MEDICARE.
Explore
When can you enroll? An interactive year
Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.
Explore
The parts of Medicare
Good to know
Frequently asked questions
Can I use the January–March window to join Medicare Advantage for the first time?
How many changes can I make between January 1 and March 31?
When does my new coverage start?
What if I move out of Sterling Heights during the year?
- CMS — Medicare enrollment periods (medicare.gov)
For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.
Also for Sterling Heights
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This page was last updated: September 30, 2026.