Plain-words guide

What is the Medicare Annual Notice of Change (ANOC) letter?

The Annual Notice of Change (ANOC) is the letter your Medicare Advantage or Part D drug plan must send you each September. It lists every change the plan is making for next year — premium, deductible, copays, the drug list, and which doctors and pharmacies stay in network. If you do nothing, you are automatically re-enrolled with those changes on January 1. You have from October 15 to December 7 (Medicare open enrollment) to switch plans if the changes don't work for you.

What to look for first

Four numbers decide most of it: next year's monthly premium, the medical deductible, the drug deductible, and the maximum out-of-pocket. Then check the two lists people skip: the drug tier chart (a drug moving up one tier can cost hundreds more over a year) and the provider/pharmacy network changes.

What to do if you don't like the changes

Between October 15 and December 7 you can switch to a different Medicare Advantage plan or back to Original Medicare (with or without a Part D plan). Compare plans at medicare.gov/plan-compare, or call 1-800-MEDICARE. Florida residents can get free one-on-one help from SHINE counselors at 1-800-963-5337.

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Common questions

When does the ANOC letter arrive?

Plans must send it by September 30, so most arrive in September.

Do I have to respond to the ANOC?

No. If you do nothing you stay in the plan with the new terms starting January 1. Responding matters only if the changes don't work for you — then switch during open enrollment, October 15 to December 7.

What's the difference between the ANOC and the EOC?

The ANOC summarizes what's changing; the Evidence of Coverage (EOC) is the full contract. Read the ANOC first, then check the EOC for details that matter to you.

Sources: Medicare.gov — Annual Notice of Change · Florida SHINE (free counseling). This guide is general information, not legal, financial, or medical advice.