Medicare ANOC: What Beneficiaries Need to Know

What Is a Medicare ANOC?

A Medicare Annual Notice of Change, or ANOC, is a document sent each fall by Medicare Advantage and Part D plans. It outlines the changes the plan will make for the upcoming year, including adjustments to premiums, deductibles, drug formularies, and provider networks. The ANOC arrives by October 15, giving beneficiaries time to review their options before the Medicare Open Enrollment Period ends on December 7. The notice is specific to each plan, so the details vary depending on which Medicare Advantage plan or Part D plan you have.

What Information Does the ANOC Include?

The ANOC covers several categories of information that affect how you use and pay for your coverage. These typically include:

• Premium changes for the coming year
• Updates to your deductible and out-of-pocket maximum
• Changes to your drug formulary, including drugs added or removed
• Tier placement changes for your current medications
• Network changes, such as doctors or hospitals no longer in-network
• Updates to cost-sharing amounts like copays and coinsurance
• Changes to supplemental benefits or program structure

The notice also highlights any changes that require you to take action, such as switching to a different pharmacy or finding a new primary care provider. The ANOC is written in plain language, but it can be lengthy, so focus on the sections that affect the services and prescriptions you use most.

Why the Medicare ANOC Matters

The ANOC matters because it gives you a clear picture of what will change before the plan year begins. If your plan removes a drug from its formulary or raises your copay for a specialist visit, you need to know early enough to adjust. The notice also helps you compare your current plan against other options available during the Medicare Open Enrollment Period. Plans change every year, and a plan that worked well last year may not be the best fit for the next.

What to Do When You Receive Your ANOC

When your ANOC arrives, review it carefully and compare the changes against your current usage. Start by checking whether your medications are still covered and at what cost. Next, confirm that your doctors and hospitals remain in-network. If the changes are manageable, you can keep your plan as-is. If not, the Medicare Plan Finder on Medicare.gov lets you compare other Medicare Advantage and Part D plans available in your area. You can also call your plan directly with questions about specific items in the ANOC.

If you decide to switch plans, the change takes effect on January 1 of the new year. Make sure you enroll in the new plan before December 7 to avoid a gap in coverage. If you stay with your current plan, you do not need to take any action, but keep the ANOC for your records.

Medicare ANOC vs. Evidence of Coverage

The ANOC is not the same as the Evidence of Coverage, orEOC. The EOC is a more detailed document that explains how the plan works year-round, including rules for services, appeals, and grievances. The ANOC, by contrast, focuses specifically on the changes coming for the next year. Both documents are important, but the ANOC is the one you should read first each fall because it flags what will be different.

What If You Miss the ANOC or Have Questions?

If you do not receive your ANOC by early October, contact your plan directly to request a copy. You can also call 1-800-MEDICARE or your State Health Insurance Assistance Program for help understanding the changes. SHIP counselors provide free, unbiased guidance on Medicare plan choices and can help you interpret your ANOC. Acting on the information in the ANOC helps you avoid unexpected costs and ensures your coverage fits your needs for the year ahead.