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Medicare · Daily

Understanding your Medicare annual notice of change

Each fall, if you're enrolled in a Medicare Advantage or Part D plan, you receive a crucial document: your Annual Notice of Change. This guide helps you understand what it is, why it matters, and how to use it to make informed decisions about your health coverage for the coming year.

By Editorial Desk · The Health Almanac Editorial TeamPublished October 19, 20265 min read

Every autumn, Medicare beneficiaries who are enrolled in a Medicare Advantage (Part C) plan or a Medicare Prescription Drug (Part D) plan receive an important document: the Annual Notice of Change (ANOC). This notice arrives in September, ahead of the Annual Enrollment Period (AEP) which runs from October 15 to December 7 each year. While it might look like just another piece of mail, understanding your ANOC is key to ensuring your healthcare coverage continues to meet your needs for the upcoming year.

What is the Annual Notice of Change?

The ANOC is a letter from your current Medicare Advantage or Part D plan provider. It details any changes that will occur to your plan's benefits, costs, or rules starting January 1 of the next year. Think of it as a preview of your plan for the upcoming calendar year. These changes can include shifts in your monthly premium, deductible amounts, copayments, coinsurance, or even the network of doctors and hospitals you can use. For Part D plans, the ANOC will also highlight changes to the plan's formulary, which is its list of covered drugs.

It’s important to remember that Medicare plans can and often do change each year. These changes are not always drastic, but even small adjustments can impact your healthcare budget or access to preferred providers or medications.

Why reading your ANOC matters

Many people receive their ANOC and set it aside, assuming their plan will remain largely the same. However, overlooking this document can lead to unexpected costs or disruptions in care. For example, your current primary care physician might leave your plan's network, or a medication you rely on could move to a higher cost-sharing tier or no longer be covered. If you don't review these changes, you might only discover them when you go to fill a prescription or see a doctor in the new year.

Reviewing your ANOC gives you the opportunity to assess if your current plan will still be the best fit for your health and financial situation. If you find that the changes are not favorable, you have the AEP window to switch to a different plan that better meets your needs.

How to review your ANOC effectively

When you receive your ANOC, take the time to read it carefully. Here are the key areas to focus on:

  • Premiums, deductibles, copayments, and coinsurance: Look for any increases or decreases in what you will pay out-of-pocket.
  • Drug formulary (for Part D plans): Check if your current medications are still covered and if their cost-sharing tier has changed. Pay special attention if any frequently used drugs are being dropped from coverage.
  • Provider network (for Medicare Advantage plans): Confirm that your preferred doctors, specialists, and hospitals will still be in your plan's network.
  • Benefits: See if any extra benefits, like dental, vision, or hearing, have been added, removed, or changed.

Once you’ve identified the changes, consider how they will impact your personal healthcare needs and budget for the next year. If you're unsure about any details, don't hesitate to call your plan provider for clarification. They can explain the changes and help you understand their implications.

Deciding what to do next

After reviewing your ANOC, you have a few options:

  1. Keep your current plan: If the changes are minimal, or if the plan still meets your needs and budget, you don't need to do anything. Your coverage will automatically continue for the next year with the updated terms.
  2. Switch plans: If you find the changes significant and unfavorable, or if you simply think there might be a better option available, you can use the Annual Enrollment Period (October 15 – December 7) to compare plans and enroll in a new one. Medicare's Plan Finder tool (medicare.gov/plan-compare) is a valuable resource for this.

Taking a little time each fall to review your Annual Notice of Change can save you stress and money in the year ahead, ensuring your Medicare coverage remains aligned with your health and financial well-being.

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  • updateOctober 19, 2026 — Daily evergreen · Medicare
Permanent URL: /archive/2026/10/19/medicare-daily-2026-10-19