Your Medicare Plan Will Send an Important Letter This Fall — Don’t Throw It Away

Medicare beneficiaries tend to receive plenty of mail, especially as fall approaches, so it’s understandable when another thick insurance envelope heads straight for the recycling bin. But there’s one piece of Medicare mail you should open before tossing anything: your Annual Notice of Change, commonly called the ANOC. This document tells you what’s changing in your Medicare Advantage or Medicare drug plan for the coming year, including changes that could affect what you pay and what your plan covers. That’s especially important heading into 2027 because Medicare plans can adjust their benefits, costs, drug coverage, and other details from one year to the next. Spending 20 minutes reviewing your Medicare Annual Notice of Change could prevent months of frustration (or unexpected expenses) after January arrives.

This Isn’t Just Another Medicare Advertisement

The Medicare Annual Notice of Change isn’t marketing material trying to persuade you to buy a different insurance policy. According to Medicare’s official explanation of the Annual Notice of Change, people enrolled in Medicare plans receive the notice from their plan each fall, generally in September. It explains changes to coverage, costs, and other plan details that will take effect in January. Medicare specifically recommends reviewing those changes to determine whether your current plan will continue meeting your needs during the upcoming year. If September passes and you haven’t received an ANOC, Medicare advises contacting your plan rather than assuming nothing is changing.

Your Costs May Not Look the Same in 2027

One of the first sections worth checking is the comparison of what you’re paying now with what you’ll pay next year. Depending on your plan, premiums, deductibles, copayments, coinsurance, and other out-of-pocket responsibilities can change annually. Even relatively small adjustments deserve attention because recurring medical expenses can multiply quickly over an entire year. A $10 increase in a monthly premium, for example, means another $120 annually before you’ve paid for a single appointment or prescription. Rather than simply asking whether you can afford your current plan, use the Medicare Annual Notice of Change to determine whether you’ll be comfortable with the plan you’re actually getting in 2027.

Prescription Changes Deserve a Careful Look

People who regularly take prescription medications should pay particularly close attention to changes involving drug coverage. A plan can change its formulary, which is the list of medications it covers, and changes involving a drug’s coverage or cost-sharing can affect what you pay at the pharmacy. Don’t just search for the names of your medications and stop there; look at their coverage details and then compare your expected annual costs under available plans. Medicare reminds beneficiaries that health and drug plan costs and benefits can change each year, which is one reason annual comparison shopping matters even when you’ve been satisfied with your existing coverage. If several prescriptions are involved, create a simple medication list with the exact drug name, dosage, quantity, and preferred pharmacy before you begin comparing plans.

Don’t Assume Your Doctors Will Always Be Available

For Medicare Advantage members, access to preferred doctors, hospitals, specialists, and other providers can be just as important as premiums. Provider networks can change, so don’t assume that seeing the same physician this year automatically guarantees the same arrangement next year. The ANOC is your signal to investigate anything that could affect how you receive care and to confirm important providers directly when necessary. This becomes particularly important for someone managing cancer, heart disease, diabetes, or another condition requiring an established team of specialists. Changing plans solely because another option advertises a cheaper premium can backfire if the doctors or services you rely on aren’t available under that coverage.

Another Medicare Document Is Worth Keeping Too

The ANOC isn’t the only important document arriving around this time, because Medicare plans also provide an Evidence of Coverage, or EOC. Medicare says the Evidence of Coverage provides details about what your health or drug plan covers, what you pay, and other important information, and it’s generally provided in September. Think of the ANOC as your warning about what’s changing and the EOC as a more detailed guide to how the plan works. Keeping both documents somewhere accessible can save considerable time when questions arise about coverage later. If you’re helping an older parent manage Medicare paperwork, these are two documents worth labeling rather than adding to an overflowing stack of insurance mail.

You Have a Limited Window to Make Changes

Finding something you dislike in your Medicare Annual Notice of Change doesn’t mean you’re stuck with it. Medicare Open Enrollment runs from October 15 through December 7, giving beneficiaries an annual opportunity to review and change Medicare health and drug coverage for the following year. Depending on your current coverage, options can include switching Medicare Advantage plans, changing Medicare drug plans, or moving between Medicare Advantage and Original Medicare. Changes made during this period generally take effect January 1, provided the enrollment request reaches the plan by the December 7 deadline. That timing is exactly why reviewing the ANOC when it arrives in September makes more sense than rediscovering it underneath a pile of holiday catalogs in late December.

Keeping Your Plan Is Still a Decision

There’s nothing inherently wrong with staying in the same Medicare plan, and changing coverage simply because Open Enrollment arrives isn’t necessary. In fact, Medicare’s guidance on annual enrollment says beneficiaries who choose to keep their existing health and drug coverage generally don’t need to take action for that coverage to continue. The important distinction is between actively deciding your current plan still works and passively allowing it to renew because you never checked what changed. Compare your prescriptions, preferred providers, anticipated medical needs, premiums, deductibles, and other costs before making that decision. If everything still fits, keeping your current plan can be perfectly reasonable, and you’ll know you’re doing it based on information rather than inertia.

Give This Envelope 20 Minutes Before You Toss It

The Medicare Annual Notice of Change may not look exciting when it lands in your mailbox, but it can contain some of the most financially important information you’ll receive all fall. Set it aside, grab your medication list and recent medical bills, and compare the upcoming coverage with the healthcare you actually expect to use. Circle anything involving higher costs, prescription changes, benefits you regularly use, or questions about your doctors, then investigate those issues before Open Enrollment ends. You don’t have to become a Medicare expert or automatically switch plans; you simply need enough information to make an intentional choice for 2027. That small investment of time could be the difference between starting January confident in your coverage and discovering an expensive surprise when you need care.

Have you ever discovered an unexpected premium, prescription, or coverage change in your Medicare Annual Notice of Change? Tell us what you found in the comments.

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Drew Blankenship

Drew Blankenship is a seasoned personal finance and lifestyle writer with more than a decade of professional writing experience crafting clear, actionable advice that helps savers and investors over 40 protect their wealth and make smarter everyday decisions. His bylines appear regularly on SavingAdvice.com, CleverDude.com, and other respected outlets, where he draws on deep industry knowledge to deliver practical insights on cost control, smart spending, and long-term financial security.