Medicare Enrollment

What Changes During Medicare Annual Enrollment, Oct 15 – Dec 7

By Tai Thao, Licensed Independent Medicare Agent, Golden Milestone Services · Updated October 16, 2026

Medicare Annual Enrollment runs from October 15 through December 7, 2026. During this period, people with Medicare can review certain health and prescription drug coverage choices for 2027. The most useful first step is not choosing something new. It is checking whether your current coverage will still fit your doctors, prescriptions, health needs, and budget next year.

What can I change during Medicare Annual Enrollment?

This annual window allows eligible people to join, leave, or switch Medicare Advantage coverage; change Medicare prescription drug plans; or move between Original Medicare and Medicare Advantage. The choices available depend on your current coverage. If you make an eligible change during this period, the new coverage generally begins January 1, 2027. Medicare must receive your enrollment request by December 7.

Original Medicare includes Part A and Part B. Medicare Advantage is another way to receive Part A and Part B benefits through a Medicare-approved private plan. A stand-alone Part D plan provides prescription drug coverage for people using Original Medicare and some other arrangements. Understanding which kind of coverage you have helps you identify which changes the annual window actually permits.

Why review a Medicare plan if I like it today?

A plan that fits this year may work differently next year. Health plans and drug plans can update coverage rules, provider networks, drug lists, pharmacy arrangements, and what members pay. Your own health can also change. You do not need to assume your current coverage is wrong; you do need to check its upcoming terms before deciding whether to keep it.

Think about the care you actually use. List your regular doctors and specialists, preferred hospital, prescriptions and dosages, and the pharmacy you visit. If you travel or spend part of the year away from Wisconsin, add those locations to your review. This turns a broad insurance comparison into specific questions that can be checked against current plan information.

What is the Annual Notice of Change, and why does it matter?

If you are enrolled in a Medicare health or drug plan, your plan sends an Annual Notice of Change, often called an ANOC, in the fall. It explains changes expected to take effect in January. Read it rather than discarding it. Pay particular attention to changes affecting the services you use, the prescriptions you take, and your financial responsibility.

The ANOC is a starting point, not the only document you should use. Confirm important details against the next-year plan materials and current provider and pharmacy information. If you cannot find your notice, contact your plan and request it. You can also use Medicare.gov to compare coverage choices in your area.

How do I check whether my doctors and prescriptions are covered?

Start with the complete names of your providers, the office locations where you see them, and your preferred hospital. Ask the providers whether they expect to participate in the particular coverage you are considering for 2027. A familiar company name is not enough; participation can differ by plan and location. Verify rather than assuming that last year’s answer will remain correct.

Next, check every medication against the plan’s formulary, which is its covered-drug list. Look at dosage, quantity limits, prior authorization requirements, and pharmacy options. A medication can appear on a formulary while still being subject to rules that affect how you obtain it. Ask the plan or pharmacy to clarify anything that is unclear before changing coverage.

What should I compare besides the monthly premium?

A monthly premium is only one part of the decision. Consider deductibles, copayments, coinsurance, expected prescription expenses, network access, and any coverage rules that could affect your treatment. Compare what you are likely to use, not just a short list of advertised features. A benefit that sounds attractive may matter less than dependable access to the care you already receive.

Write down questions before you call or meet with someone. For example: Will my specialist be in network? Is my medication covered at my preferred pharmacy? Does this plan require a referral? What happens if I need care outside my local area? Ask for the answer in writing or confirm it in the official plan materials when possible.

Do I have to switch Medicare coverage every fall?

No. Annual Enrollment is an opportunity to review and make eligible changes, not an instruction to switch. If you are satisfied after checking next-year details, you may decide to keep your current coverage. However, doing nothing without reading your plan notices is different from making an informed decision to stay. Some plans may not renew, and the next steps can differ in that situation.

Do not cancel existing coverage simply because a different option sounds interesting. First understand how a proposed change affects medical coverage, drug coverage, and any other insurance you have. If you have employer, retiree, union, Medicaid, or other benefits, speak with the appropriate benefits administrator before changing Medicare coverage.

Is Medicare Annual Enrollment the same as Medigap open enrollment?

No. The October 15 through December 7 period mainly concerns Medicare Advantage and Medicare prescription drug coverage. Medicare Supplement Insurance, also called Medigap, helps pay certain out-of-pocket expenses alongside Original Medicare. Medigap has different enrollment and consumer-protection rules. The annual Medicare plan window does not automatically create a new right to buy a Medigap policy without medical underwriting.

Wisconsin also structures Medicare Supplement coverage differently from the standardized lettered policies commonly described for many other states. If you are considering a switch from Medicare Advantage to Original Medicare, investigate whether you can obtain the additional coverage you want before making the change. Do not assume a Medigap application will be approved.

What if I miss the December 7 deadline?

After December 7, your ability to change Medicare health or drug coverage is more limited. Certain people qualify for Special Enrollment Periods based on their circumstances. There is also a separate Medicare Advantage Open Enrollment Period for people already enrolled in Medicare Advantage, with its own rules. Neither option is a general extension of the fall annual window for everyone.

If you are uncertain about your rights after the deadline, use the official Medicare enrollment information or seek individualized guidance. A missed deadline does not mean every person has the same next step. The right answer depends on the coverage you hold and whether a specific enrollment exception applies.

What should I do before December 7 in Wisconsin?

Gather your Medicare card, current plan information, Annual Notice of Change, prescription list, and names of your providers. Check next-year information for the exact coverage you hold. Compare available options using Medicare.gov, and confirm important network or drug questions directly. If you decide to make a change, submit the enrollment request within the applicable window and keep your confirmation.

If you would rather talk through the information, prepare those same documents before your appointment. The goal is to understand what changes in 2027 and choose deliberately. Start early enough to resolve questions before December 7, instead of making a rushed decision on the final day.