Your Annual Notice of Change: Do Not Throw It Away

The Annual Notice of Change is the letter your Medicare Advantage or Part D plan mails by September 30, and it lists every change to your coverage taking effect January 1. It costs about twenty minutes to read. Open it, go straight to the cost comparison table, then check your prescriptions and your doctors by name.

Every fall, a thick envelope from your insurance company lands in a pile of Medicare mail that mostly deserves the recycling bin. This one does not. It is the only document that tells you, in your plan’s own words, exactly how your coverage is about to change. People who skip it usually find out what was in it at the pharmacy counter in February, when the window to do anything about it has closed.

What is the Annual Notice of Change?

The Annual Notice of Change, usually shortened to ANOC, is a required disclosure. If you are enrolled in a Medicare Advantage plan or a standalone Part D drug plan, your insurer has to send you one by September 30 each year, ahead of the Annual Enrollment Period that opens October 15.

Its job is narrow and useful: it puts this year’s plan beside next year’s version of the same plan and shows you what moved. Nothing else you receive does that. The document typically covers:

• Your monthly premium and any change to the plan deductible
• Medical copays and coinsurance for primary care, specialists, urgent care, hospital stays, and imaging
• Your in-network out-of-pocket maximum, which is the number that caps a bad year
• Drug coverage changes — the new drug deductible and out-of-pocket maximum for the coming year
• Extra benefits like dental, vision, hearing, over-the-counter allowances, and fitness memberships, which are the first things carriers trim when margins tighten
• Service area — whether the plan will still be offered where you live

If you have Original Medicare with a Medicare Supplement policy, you will not get an ANOC for the Medigap plan. Medigap benefits are standardized by letter and do not change from year to year, though your premium can still increase. You would still get an ANOC for your standalone Part D plan.

What is the difference between the ANOC, the EOC, and a non-renewal notice?

They are three separate letters, and the third one is the one with real deadlines attached. People conflate them constantly. Here is what separates them.

The ANOC is the one you read every year. The non-renewal notice is the one that, if it ever shows up, changes what you are allowed to do and how long you have to do it.

What should you actually look for in your ANOC?

You do not need to read it front to back. Work through these five things in order and you will have your answer in about twenty minutes.

What happens if you throw it away?

Nothing, immediately. Your plan renews automatically on January 1 with every change in that letter applied. You are not asked to sign anything. Premiums go up, the drug moves to Tier 4, the dental allowance shrinks, and none of it requires your participation.

The consequence is timing. Your chance to respond runs October 15 through December 7. After that, your options narrow to the Medicare Advantage Open Enrollment Period from January 1 through March 31 — available only if you are in a Medicare Advantage plan, and good for exactly one change — or a Special Enrollment Period, which requires a qualifying event. Absent one of those, the coverage you have on January 1 is your coverage for the year.

What if your plan is leaving your county?

Then you have more time and more options than most people assume, and a separate notice due by October 2 will tell you so in writing. This is a different situation from an ordinary ANOC, and a better one.

Insurers exit counties. They discontinue plans, reduce service areas, or end a Medicare contract entirely, and it has less to do with you than with the economics of that particular county. When it happens, federal rules require the plan to send a written non-renewal notice by October 2 for coverage ending December 31, and to tell you what other options exist in your area.

That notice is not bad news wrapped in a bad envelope. It is a legal trigger, and it hands you two things you would not otherwise have.

One: extra time, through the end of February

Losing your plan to a non-renewal or a service area reduction opens a Special Enrollment Period that runs from December 8 through the last day of February. That is on top of the regular October 15 to December 7 window, not instead of it. You can use either.

The catch is the effective date, which follows when you enroll:

Read that table carefully. Your old plan ends December 31. If you wait until January to choose, your new coverage does not start until February 1, and you have a month with no Medicare Advantage plan and no drug coverage. The Special Enrollment Period is a safety net for people who missed the notice, not a reason to wait. Decide before December 31 if you possibly can.

If you do nothing at all, you are not left without Medicare. You return to Original Medicare, Part A and Part B, on January 1. But Original Medicare by itself has no drug coverage, no out-of-pocket maximum, and no supplement. Landing there by default rather than by choice is how people end up with a 20% coinsurance exposure they did not plan for, plus a Part D late enrollment penalty that follows them permanently.

One wrinkle worth asking about: if your carrier is moving you into one of its other plans rather than ending your coverage outright, the change may be classified as a consolidation rather than a non-renewal, and the Special Enrollment Period may not apply. The classification is not always obvious from the letter. Confirm it with the plan or with 1-800-MEDICARE before you count on the extra time.

Two: guaranteed issue rights for a Medicare Supplement

This is the part almost nobody knows, and it is the most valuable thing in the envelope.

Normally, buying a Medicare Supplement policy outside your one-time six-month Medigap Open Enrollment Period means medical underwriting. The insurer reviews your health history and can charge you more or decline you outright. For someone who has been on Medicare Advantage for a decade and has since developed a condition or two, that door is usually shut.

When your Medicare Advantage plan leaves Medicare or stops serving your area, federal law reopens it. You get a guaranteed issue right: an insurer must sell you certain Medigap policies, cannot ask about your health, cannot charge you more because of it, and cannot impose a pre-existing condition waiting period.

The conditions are specific, and all of them matter:

• You have to return to Original Medicare. The guaranteed issue right exists because you are losing Medicare Advantage and going back to Parts A and B. If you use your Special Enrollment Period to join a different Medicare Advantage plan instead, you do not get it. This is the single most common way people forfeit the right without realizing they had it.
• You have 63 days from the date your old coverage ends, and you can apply as early as 60 days before it ends. Applying early is better — it means the Medigap policy is in force on January 1 with no gap. Miss the 63 days and the guarantee is gone.
• It covers certain plan letters, not all of them. Generally Plan A, B, D, G, K, or L from any insurer selling them in your state. If you first became eligible for Medicare before January 1, 2020, Plan C and Plan F are available to you instead of D and G. Some states and some carriers offer more than the federal minimum.
• You still need Part D separately. Medigap policies sold today do not include drug coverage. If you drop a Medicare Advantage plan that included drugs, enroll in a standalone Part D plan in the same window or you will face a permanent late enrollment penalty.

Whether Medigap is the right destination is a separate question from whether you can get in the door. Our head-to-head comparison of Medicare Advantage and Medigap walks through the trade-offs, and what Medicare supplement plans actually cover explains the standardized letters. But price a guaranteed-issue Plan G before you choose another Advantage plan. You may not get another chance at that price without a health review.

In Florida, there is no annual birthday rule or anniversary window that reopens guaranteed issue the way a handful of other states have. For someone in St. Johns County, or anywhere else in Northeast Florida, a plan exit may be the only guaranteed-issue opportunity you ever see. Treat it that way.

What if your Part D drug plan is the one leaving?

You get the same Special Enrollment Period, December 8 through the last day of February, but you do not get a Medigap guaranteed issue right. Standalone Part D plans get non-renewed too, and the mechanics are similar with that one difference.

The guaranteed issue right is triggered by losing a Medicare Advantage plan, not by losing drug coverage. If you already have a Medigap policy, nothing about it changes.

The thing to watch is the gap. If you do not choose a new drug plan and your old one ends December 31, you have no Part D coverage. Every month without creditable drug coverage adds to a late enrollment penalty that is permanent once it attaches. One exception: people who receive Extra Help are generally reassigned automatically to another drug plan. That reassignment is made for you, not by you, and it is not necessarily the plan that fits your prescriptions best. If you get that notice, it is still worth comparing.

What if you never received an ANOC?

Call your plan. The most common reason is an old mailing address, and the second most common is that you opted into electronic delivery at some point and the notice went to an email you do not check.

You can also ask the plan to send a replacement, or find next year’s plan details on Medicare Plan Finder starting October 1. Do not assume that no letter means no changes. The letter is required; its arrival in your hands is not guaranteed.

Ready to have someone read the letter with you?

Reading your own ANOC is the education. Working out whether the plan that changed is still the best plan available in your ZIP code is the work, and that requires running your actual drug list against every option in your county and verifying that your actual doctors are actually in-network.

That is what a consultation does, at no cost and with no obligation. Bring the ANOC, a list of your prescriptions with dosages, and a list of your doctors. If your plan is being discontinued, bring the non-renewal notice too, because the date on it starts clocks that matter. We will price both paths — another Medicare Advantage plan, and Original Medicare with a supplement — so you can see the guaranteed-issue option before it expires rather than after. There is no pitch for a particular carrier. If your current plan still wins, that is a good outcome, and now you know it instead of assuming it.

At Duncan Market Insurance, Carolyn Duncan has spent more than 20 years in the insurance industry and works today as an independent broker licensed in Florida. We are based in St. Augustine and serve clients across Northeast Florida, and because consultations happen by phone or video, sitting down together is simple wherever you are in the state. If you want to know how to evaluate the person helping you with a decision this size, here is what to look for in an insurance broker. Our Medicare services page covers the full range of what we help with, and the rest of our Education Center goes deeper on the individual pieces.

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Sources

• Medicare Open Enrollment partner resources, Centers for Medicare & Medicaid Services
• Special Enrollment Periods, Medicare.gov
• Understanding Medicare Advantage & Medicare Drug Plan Enrollment Periods, CMS
• Choosing a Medigap Policy: A Guide to Health Insurance for People with Medicare, Medicare.gov
• Compare Medigap plan benefits, Medicare.gov
• Guide to consumer mailings from CMS, Social Security, and plans, CMS

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