Your Medicare Plan Is Changing for 2027? Here Is What to Do During Open Enrollment.
If your Annual Notice of Change showed a higher premium, new copays, a changed drug list, or a different network for 2027, you do not have to just accept it. Open Enrollment runs October 15 to December 7, and that is your window to switch to something that fits better, effective January 1. Do nothing and your plan simply renews with its new terms. Below is how to read the changes and act in time.
Have your ANOC or other notice? Upload it and we explain it free. Want the comparison done for you? Decision Support researches your options for a flat $99. CareRoute is independent, does not sell insurance, and takes no plan commissions.
Why your plan is changing
Medicare Advantage and Part D plans are private contracts that reset every year. Each fall your plan sends an Annual Notice of Change (ANOC), which you should have by September 30, spelling out what will be different starting January 1: the premium, the deductible, your copays and cost-sharing, the list of covered drugs (the formulary), and the doctor and pharmacy networks. None of that means you did anything wrong. It means the plan you have in 2026 may not be the same plan in 2027, so it is worth a look before it renews on its own.
The deadlines that apply
Annual Enrollment Period (AEP): October 15 to December 7, 2026
Anyone with Medicare can switch Medicare Advantage or Part D plans, or move between Original Medicare and Medicare Advantage, during this window. Changes you make take effect January 1, 2027. The plan has to receive your request by December 7.
Medicare Advantage Open Enrollment Period (MA OEP): January 1 to March 31
If you are in a Medicare Advantage plan on January 1, this window gives you one more change: switch to a different Medicare Advantage plan, or return to Original Medicare and add a Part D drug plan. It is a useful backstop if you realize in January that the new terms are not working.
If you do nothing
Your plan renews automatically with its new premium, benefits, and drug list. You stay covered, just on the changed terms. So doing nothing is a real choice, but make it on purpose after checking the changes, not by default.
Which changes are worth switching over
Not every change is a reason to move. Scan your ANOC for the ones that actually hit your wallet or your care:
- Premium or deductible went up. Compare the new numbers to what similar plans in your area charge for 2027.
- Copays or coinsurance rose for services you actually use (primary care, specialists, hospital stays, imaging).
- A medication was dropped, moved to a higher tier, or hit with a new restriction like prior authorization or step therapy. (See what to do if your drug was dropped.)
- Your doctor, hospital, or pharmacy left the network. (See what to do when your doctor leaves the network.)
- Extra benefits were cut (dental, vision, hearing, over-the-counter allowance, fitness) that you count on.
Step by step: what to do now
Find your ANOC and read the "what is changing" summary. Compare it to how you actually used the plan this year.
List what matters to you: your current doctors, your medications and their doses, and the services you use most.
On the Medicare Plan Finder at medicare.gov, enter your drugs and compare plans in your area by total yearly cost, not just premium. Confirm your doctors are in-network and your drugs are covered.
Decide the core choice: stay put, switch to a different Medicare Advantage plan, or move to Original Medicare plus a Part D plan (and, if you want predictable costs, a Medigap policy).
Enroll by December 7 so your new coverage starts cleanly on January 1 with no gap.
Want a second set of eyes first? Confirm anything with your plan or 1-800-MEDICARE (1-800-633-4227), a free SHIP counselor (shiptacenter.org), or upload your notice and we will explain exactly what changed and what applies to you.
Two ways to get from "my plan changed" to a decision
The right call comes down to whether your specific doctors are in network and your specific drugs are covered and affordable in 2027. Start with whichever fits you. If you have your notice, upload it and we explain it in plain language for free. If you would rather have the comparison done for you, CareRoute Decision Support researches your options against your doctors, drugs, and budget for a flat $99. We are independent, do not sell insurance, and take no plan commissions, so the analysis is on your side.
Frequently asked questions
My Medicare plan is changing for next year. Do I have to accept it?
No. The Annual Notice of Change (ANOC) your plan sent shows what is changing for 2027, but you are not locked in. The Annual Enrollment Period runs October 15 to December 7, 2026, and anything you switch to takes effect January 1, 2027. If you do nothing and your plan is still offered, it simply renews with its new terms, so act only if the changes do not work for you or you find a better fit.
What is the Annual Notice of Change (ANOC)?
It is the letter your Medicare Advantage or Part D plan must send so you have it by September 30, listing next year’s changes to your premium, deductible, copays and cost-sharing, covered drugs (formulary), and provider and pharmacy networks. Only people in a Medicare Advantage or drug plan get one. Read it alongside your Evidence of Coverage to see exactly what is changing before you decide.
When can I switch my Medicare plan?
The main window is the Annual Enrollment Period, October 15 to December 7, 2026, with changes effective January 1, 2027. During it you can switch between Original Medicare and Medicare Advantage, change Medicare Advantage plans, or join, switch, or drop a Part D drug plan. If you are in a Medicare Advantage plan, you also get the Medicare Advantage Open Enrollment Period, January 1 to March 31, for one additional change.
What happens if I do nothing?
If your plan is still offered next year, it renews automatically and you keep coverage, but at the new premium, benefits, and drug list shown in your ANOC. Nothing cancels. The only reason to act is that the new terms do not work for you, or a different plan would cover your doctors and drugs better or cost less. (If your plan is actually ending, that is different: doing nothing can leave you back on Original Medicare with no drug coverage.)
Will switching plans affect my doctors or drugs?
It can, which is why you check before you switch. Networks and formularies differ from plan to plan and change every year. Before enrolling in any new plan, confirm your doctors are in its network and your medications are on its drug list and affordable. The Medicare Plan Finder at medicare.gov lets you enter your drugs and compare plans by total yearly cost.
Is CareRoute selling me a plan?
No. CareRoute is independent, does not sell insurance, and takes no plan commissions, so our analysis is on your side. Our free Medicare Letter Check explains your notice in plain language. If you want the comparison done for you against your specific doctors, drugs, and budget, Decision Support does it for a flat $99.
Related
Sources & references
This is general information, not insurance advice, and not a recommendation of any specific plan or insurer. CareRoute is independent, does not sell insurance, and takes no plan commissions. Enrollment windows and plan terms depend on your individual situation and can change. Confirm your options and dates with your plan, 1-800-MEDICARE (1-800-633-4227), or a free SHIP counselor. Last updated: October 2026.