Your Medicare Plan Should Have Sent This Notice in September — Check It Before Open Enrollment Begins

If you have a Medicare Advantage or Medicare drug plan, one piece of mail that arrived in September deserves another look before you toss it into a drawer. It’s called the Annual Notice of Change, or ANOC, and it tells you how your current plan will change when the new year begins. According to Medicare, plans send this notice each fall to explain upcoming changes in costs, coverage, and other plan details. With Medicare Open Enrollment running from October 15 through December 7, your Medicare Annual Notice of Change can help you decide whether staying put will still make financial and medical sense in 2027. Here’s what to look for before assuming the plan you liked this year is still your best choice.

Find Your Annual Notice of Change First

The Medicare Annual Notice of Change isn’t an advertisement trying to persuade you to switch plans; it comes from the plan you already have. Medicare says beneficiaries should receive the document in September and should contact their plan if they don’t get it. You may also receive an Evidence of Coverage, or EOC, which provides more detailed information about what your plan covers and what you’ll pay. That makes early October a good time to gather both documents rather than waiting until an enrollment deadline is approaching. If you discarded the paper version, call your plan or check its member website to find out how to obtain another copy.

Turn Every Plan Change Into an Annual Dollar Amount

The easiest way to understand why the Medicare Annual Notice of Change matters financially is to stop looking at each change in isolation and calculate what it could mean over an entire year. A $25 increase in your monthly plan premium, for example, is $300 more from your retirement budget in 2027, while an extra $20 copay on a specialist you visit six times adds another $120.

Prescription changes can compound the difference further, particularly if a medication moves to a more expensive tier or your usual pharmacy no longer provides the plan’s most favorable pricing. Medicare’s Plan Compare tool lets beneficiaries enter their prescriptions and pharmacies to estimate monthly and yearly costs under available plans, making it possible to compare more than premiums alone. Before automatically renewing, total up the costs you’re reasonably likely to encounter in 2027 because several seemingly small changes in the ANOC could collectively take hundreds of additional dollars out of your Social Security or retirement income.

Look at What You’ll Pay Next Year

Don’t stop at the monthly premium when evaluating a plan’s cost. The Medicare Annual Notice of Change may identify changes involving premiums, deductibles, copayments, coinsurance, and other expenses that become effective in January. A plan with a low or even $0 Medicare Advantage premium can still leave you paying considerably more when you actually receive care. CMS currently projects that the average Medicare Advantage premium across plans will decline in 2027, but an average tells you nothing about what will happen to your particular plan. Your own costs and healthcare usage are what ultimately determine whether staying with the plan saves money.

Check Every Prescription You Take Regularly

Drug coverage deserves its own review even if none of your prescriptions changed during 2026. CMS explains that Medicare health and drug plans can change from year to year, including their costs and coverage. Check whether each prescription remains on the formulary, then look for changes to its tier, cost-sharing requirements, or applicable coverage rules. Also verify whether the pharmacies you normally use will continue to offer favorable in-network or preferred pricing under your plan.

A $10-lower monthly premium saves $120 over a year, but that savings can disappear quickly if one regularly used prescription becomes substantially more expensive or your preferred pharmacy no longer offers the plan’s best pricing.

Don’t Assume Your Doctors Will Be Unaffected

People enrolled in Medicare Advantage should pay close attention to provider access as well as price. CMS specifically warns that Medicare plans can make yearly changes involving which providers and pharmacies participate in their networks. If you regularly see a primary-care physician, cardiologist, oncologist, or another specialist, confirm that provider participation directly rather than relying solely on last year’s information. Do the same for hospitals, outpatient facilities, and other providers that would be difficult for you to replace. The cheapest plan on paper can become a poor financial bargain if staying with your preferred medical team suddenly requires out-of-network care or changing plans.

Review Benefits You Actually Use

Medicare Advantage plans frequently advertise supplemental benefits, but a long benefits list isn’t necessarily the same thing as valuable coverage. Look at dental, vision, hearing, fitness, transportation, and other benefits your plan offers and determine whether the amounts, restrictions, or eligibility rules are changing. The goal isn’t to find the plan with the longest list of extras; it’s to find coverage that matches the healthcare services you’re reasonably likely to use. Someone who needs expensive dental work may evaluate benefits differently from someone primarily concerned about prescription costs or specialist access. Reading the Medicare Annual Notice of Change with your own healthcare history beside you makes those tradeoffs much easier to spot.

Compare Your Current Plan Even If You Love It

You don’t have to abandon a Medicare plan simply because Open Enrollment arrives every October. CMS says that if your existing plan will continue to meet your needs and is still being offered, you don’t have to make a change. But that’s different from automatically renewing without reviewing anything, because your plan and competing plans can both change. Medicare Open Enrollment runs October 15 through December 7, and changes made during this period generally become effective January 1. Spending an hour comparing options now can be worthwhile even when the final decision is to keep exactly what you have.

Pay Attention If Your Plan Won’t Continue

Some beneficiaries may receive more consequential notices when their plan is leaving Medicare or won’t be offered in their service area the following year. That’s particularly important in a year when insurers adjust where they offer Medicare Advantage coverage, meaning a national headline about premiums doesn’t necessarily describe the choices available in your county. Don’t interpret a plan termination or service-area change as meaning you’ve lost Medicare itself; it means you need to understand the coverage choices available to you for the coming year. Read every plan notice carefully and contact Medicare or the plan if you’re unsure what action is required. Waiting until December can leave considerably less time to compare doctors, medications, and costs thoughtfully.

This September Notice Could Change Your 2027 Budget

The Medicare Annual Notice of Change isn’t exciting reading, but it may be one of the most financially important insurance documents you receive all year. Put this year’s notice beside your medication list, preferred doctors, anticipated medical needs, and 2026 healthcare spending, then identify anything that’s changing for 2027. Beginning October 1, Medicare says beneficiaries can start comparing their current health and drug coverage with 2027 options, giving you time to research before Open Enrollment officially begins October 15. If you need unbiased assistance, Medicare directs beneficiaries to Medicare.gov and 1-800-MEDICARE, and your State Health Insurance Assistance Program can also provide Medicare counseling.

Have you checked your Medicare Annual Notice of Change yet, and did you find any 2027 change that surprised you?

What to Read Next

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Amanda Blankenship

Amanda Blankenship is Chief Editor at District Media, Inc., leading content strategy, quality assurance, and editorial operations across high-traffic personal finance sites like SavingAdvice.com and CleverDude.com. A Wingate University graduate with a BA in Communications (Journalism focus), she brings over a decade of experience in digital publishing, writing, and team leadership in the personal finance space.