Medicare Annual Enrollment Period 2026: What You Need to Know Before October 15
Every fall, Medicare beneficiaries get a dedicated window to review their coverage and make changes for the coming year. That window, the Medicare Annual Enrollment Period (AEP), opens on October 15 and closes on December 7. Any changes you make take effect on January 1, 2027.
If you currently have Medicare, this is one of the most important dates on your calendar. With AEP less than two weeks away, now is exactly the right time to start getting ready.
What Is the Medicare Annual Enrollment Period?
The Annual Enrollment Period is a set window of time each year when people with Medicare can review their current coverage and make certain changes. It runs the same dates every year:
Start: October 15
End: December 7
Changes take effect: January 1 of the following year
This period exists because Medicare plans, especially Medicare Advantage and Part D prescription drug plans, can change from year to year. Premiums, deductibles, covered drugs, provider networks, and plan benefits can all look different in 2027 than they did in 2026. The Annual Enrollment Period gives you the opportunity to make sure your coverage still works for you.
Who Does the Annual Enrollment Period Apply To?
The Medicare Annual Enrollment Period applies to people who are already enrolled in Medicare, specifically those with:
A Medicare Advantage plan (Part C)
A Medicare Part D prescription drug plan
Original Medicare (Parts A and B) who want to add or change a drug plan
If you are turning 65 soon and have not enrolled in Medicare yet, your situation is a little different. You will have your own Initial Enrollment Period. But if you are already enrolled, AEP is your annual chance to review and update your coverage.
What Can You Change During AEP?
During the Medicare Annual Enrollment Period, you can:
Switch from one Medicare Advantage plan to another
Switch from Medicare Advantage back to Original Medicare
Switch from Original Medicare to a Medicare Advantage plan
Join a Medicare Part D prescription drug plan if you do not have one
Switch from one Part D plan to a different Part D plan
Drop a Medicare Part D plan and return to Original Medicare without drug coverage (this is rarely recommended, so speak with a Medicare professional before making this decision)
You cannot use AEP to enroll in a Medicare Supplement (Medigap) plan for the first time or to switch Medigap plans in most states. Medigap enrollment typically has its own separate rules and timelines.
Why You Should Not Skip Your Annual Coverage Review
It can be tempting to let AEP come and go without doing anything, especially if you are generally satisfied with your current plan. But staying enrolled without reviewing your coverage means you might be missing important changes that could affect your costs or care.
Your plan may have changed
Medicare Advantage and Part D plans can update their premiums, deductibles, copays, and covered benefits each year. A plan that worked well for you in 2026 may have a higher cost or narrower network in 2027. You will receive an Annual Notice of Change (ANOC) from your plan in September. That document outlines exactly what is changing. Review it carefully.
Your prescription drugs may be affected
Part D plans maintain a formulary, which is a list of covered drugs, and that list can change annually. A medication you rely on could move to a higher cost tier, require prior authorization, or be removed from the formulary entirely. Reviewing your drug coverage each year helps you avoid unexpected costs at the pharmacy.
Your health needs may have changed
New prescriptions, new doctors, new health conditions, or changes in how often you need medical care can all affect what kind of plan serves you best. Coverage that made sense two years ago might not be the right fit today.
Better options may be available
New Medicare Advantage and Part D plans enter the market each year, and existing plans sometimes improve their benefits. Comparing your options during AEP can help you find coverage that fits better, sometimes at a lower cost.
A Simple AEP Checklist: What to Review Before December 7
Not sure where to start? Here is a practical checklist to help you get organized before AEP closes on December 7:
Read your Annual Notice of Change (ANOC). Your current plan mailed this to you in September. Look for changes to your premium, deductible, copays, network, and drug formulary.
Make a list of your current doctors and specialists. Check whether they are still in your plan network for 2027, especially if you have a Medicare Advantage plan, which uses provider networks.
List all your prescription medications. Include the drug name, dosage, and how often you take it. Use this list to check whether your plan 2027 formulary still covers each medication at a reasonable cost.
Think about how your healthcare needs have changed. Have you been diagnosed with anything new? Are you seeing more specialists? Do you anticipate needing more or less care next year?
Compare your options. Use the Medicare Plan Finder tool at Medicare.gov to browse available plans in your area.
Ask questions. If you are not sure what you are looking at, or if comparing plans feels confusing, a qualified Medicare professional can walk you through it at no cost to you.
Common AEP Misconceptions
If I do not do anything, I will lose my coverage.
Not true. If you do not make any changes during AEP, your current plan will simply renew for the next year, though it may have updated costs or benefits. That is exactly why reviewing it still matters.
I can change my plan anytime during AEP and it will not matter when I do it.
Mostly true, with one nuance. If you make multiple changes during AEP, the last change you make before December 7 is the one that takes effect. You can change your mind during the period, just make sure your final decision is submitted before the deadline.
AEP is the only time I can make changes.
Not always. Some Medicare Advantage enrollees have a separate Medicare Advantage Open Enrollment Period from January 1 through March 31 each year, during which they can switch to a different Medicare Advantage plan or return to Original Medicare. Certain qualifying life events can also trigger a Special Enrollment Period. But for most people, AEP is the primary opportunity to review and update coverage.
Key AEP Dates to Remember
October 15: Annual Enrollment Period begins
December 7: Annual Enrollment Period ends, last day to make changes
January 1, 2027: Coverage changes take effect
You Do Not Have to Navigate AEP Alone
Comparing Medicare plans can feel overwhelming, especially when you are trying to weigh premiums, provider networks, drug formularies, and out-of-pocket costs all at once. The good news is that you do not have to figure it out on your own.
At Accessible Health and Wellness Solutions, we help Medicare beneficiaries understand their options in plain English, without pressure and without cost to you. Whether you want to review your current plan, compare what is available for 2027, or just have someone walk you through what you are looking at, we are here to help.
The Annual Enrollment Period opens October 15 and closes December 7. Do not wait until the last minute.
Schedule your free Medicare consultation today at ahwsmedicare.com and go into 2027 confident that your coverage is working for you.
This article is for general educational purposes only. Medicare plans and options vary by location and individual eligibility. Contact a licensed Medicare professional for guidance tailored to your specific situation. For official Medicare information, visit Medicare.gov or call 1-800-MEDICARE.
