Don’t Throw Away This Medicare Letter—It Could Change Your Coverage Next Year

Every fall, millions of Medicare Advantage and Part D members receive a thick envelope that looks like routine insurance paperwork. Many people set it aside or throw it away without reading it. That can be a costly mistake. Inside is your Annual Notice of Change (ANOC), a document that explains exactly how your Medicare plan will change next year, including premiums, deductibles, prescription drug coverage, provider networks, and out-of-pocket costs.

According to Medicare, the Annual Notice of Change outlines “any changes in coverage, costs, and more that will be effective in January,” giving beneficiaries time to review their options before Medicare’s Annual Enrollment Period begins. And tossing it out or misplacing it can be a huge mistake. Here’s why.

Understanding Your Annual Notice of Change

The Annual Notice of Change is an essential summary that highlights exactly how your Medicare Advantage or Part D plan will shift in the coming year. By law, your insurance provider must send this notice by September 30, giving you a vital window to review your options before the Annual Enrollment Period begins on October 15. The document acts as a side-by-side comparison, showing your current costs and benefits versus what you can expect starting January 1.  

Many beneficiaries assume that their plan will remain identical to the previous year, but in the world of private Medicare plans, change is the only constant. Insurance companies frequently adjust their provider networks, meaning your favorite specialist or local pharmacy might no longer be in-network come January.

Furthermore, the “formulary” (the list of drugs covered by your plan) is updated annually, which could cause your medications to jump to a higher cost tier or not be covered at all. If you fail to notice these shifts, you could face unexpected out-of-pocket expenses that could have been avoided by switching to a more suitable plan.

The ANOC is generally sent to people enrolled in Medicare Advantage or standalone Part D prescription drug plans. If you have Original Medicare by itself, you typically won’t receive an ANOC because your coverage isn’t administered by a private insurer.

Identifying Key Changes in Your Coverage

When you finally open that envelope, you should focus your attention on four specific areas that impact your daily life and wallet.

Check the “maximum out-of-pocket” limit to ensure your total potential liability still aligns with your retirement savings.
Verify that your current primary care physicians and essential specialists are still included in the plan’s provider network.
Examine the drug tier changes for any prescription medications you take regularly to avoid a spike in monthly costs.
Review any added or removed supplemental benefits, such as vision, hearing, or dental allowances, which can change drastically from one year to the next.

What Happens If You Don’t Like the Changes?

Not everyone likes the changes they see in their ANOC, but you aren’t stuck with it. You have some options.

You can compare plans on Medicare.gov
Talk to a SHIP counselor
Review your medications
Compare pharmacies
Check whether your doctors still participate

The period between October 15 and December 7 is your golden opportunity to shop for a new plan if your current one no longer meets your requirements. You can use the official Medicare website to compare your current plan with other options available in your service area, potentially finding better coverage for a lower premium. Remember that if you are satisfied with the updates, you generally do not need to do anything; your enrollment will simply roll over into the new year. 

If the ANOC raises questions, free assistance is available through your state’s State Health Insurance Assistance Program (SHIP). SHIP counselors provide unbiased Medicare counseling and can help compare plans before enrollment deadlines.

The Importance of Being Your Own Advocate

The Annual Notice of Change isn’t junk mail. It’s your preview of next year’s health coverage. Spending 15 minutes reviewing it each fall can help you avoid unexpected prescription costs, provider changes, and coverage surprises after January 1. Even if you decide to keep your current plan, reading the ANOC ensures you’re making an informed decision rather than being caught off guard.