How to Read Your Annual Notice of Change Without Missing the Fine Print

Why This Envelope Matters More Than It Looks

Medicare Advantage and Part D plans renew by the calendar year. A plan that suited you last year can arrive in January with a different premium, a different drug list, a smaller network, or fewer extra benefits. Because you are enrolled automatically from year to year, the plan does not need you to approve any of that. The Annual Notice of Change, usually shortened to ANOC, is where the plan tells you.

According to CMS, plans must get the notice to you by September 30. It is generally accompanied by, or followed soon after by, a longer document called the Evidence of Coverage, which is due by October 15 and works as the plan’s full contract with you for the year. That timing is deliberate. It lines up so you receive the information before the Annual Enrollment Period opens on October 15, and you still have until December 7 to act. Our overview of the Annual Enrollment Period explains what you can change in that window.

KFF has reported that nearly seven in ten Medicare beneficiaries did not compare their coverage options during a recent open enrollment period. Part of the reason, surely, is that the paperwork looks like work. The goal of this post is to make it feel smaller.

Know Which Document You Are Holding

Document	Length	What it does	Timing
Annual Notice of Change	Short	Lists what is changing	By September 30
Evidence of Coverage	Long	Full plan contract for the year	By October 15
Formulary	A list	Covered drugs, tiers, restrictions	Check the notice for where to find it
Non-renewal notice	A letter	Says the plan is ending in your area	Generally about October 2

People often use “ANOC” and “Evidence of Coverage” interchangeably, and the confusion costs time. The two documents do different jobs.

The Annual Notice of Change is short, often a few pages to a few dozen. It focuses only on what is changing. Think of it as a redline of last year’s plan.

The Evidence of Coverage is long, often hundreds of pages, and describes everything about the plan: covered services, exclusions, cost-sharing, how to file a complaint, how to appeal. It is where you go to resolve a question the ANOC raises.

You may also receive a formulary, which is the plan’s list of covered drugs, or notice of where to find the current one. If you take any regular medications, the formulary matters as much as the notice itself. Plans also must make the provider directory available, although those can lag behind real-world changes.

You will not read the Evidence of Coverage cover to cover, and you do not need to. Use the ANOC to find the changes, then use the Evidence of Coverage to look up the details for anything that touches your care.

Start With the Cost Pages

Open the notice and find the section that compares this year’s costs with next year’s. Most plans present them in a side-by-side format. Go through it with a pen and note each line where the number moved. The ones that tend to matter most are:

• The monthly plan premium. Most people on a Medicare Advantage plan also keep paying their Part B premium separately, so look at the plan’s premium and your Part B premium as two different lines.
• The plan’s medical deductible, if it has one, and the Part D drug deductible, which is separate.
• The maximum out-of-pocket amount for medical services, which limits what you pay in a year for services Parts A and B cover.
• Copays or coinsurance for the services you use most: primary care, specialists, hospital stays, emergency room visits, outpatient surgery, and skilled nursing facility days.

Do not stop at the headline premium. A plan that holds its premium flat but raises specialist copays or hospital cost-sharing can cost more for someone who uses those services. Conversely, a premium increase may be offset by a lower copay on something you use all the time. The right comparison depends on how you use care. Our guide to Medicare Advantage plans describes how these cost features fit together.

Then the Drug Section

If you have a Part D drug plan or a Medicare Advantage plan with drug coverage, the notice will describe changes to your drug costs. Check each medication you take, not just the ones you take most. Look for four things.

First, whether the drug is still on the formulary. Plans can remove a drug from one year to the next.

Second, which tier it sits on. Tiers set your cost. A drug that moves to a higher tier typically costs you more at the pharmacy, even though it is still covered.

Third, whether any new restrictions apply. The common ones are prior authorization, where your doctor must get approval before the plan pays; step therapy, where you must try a different drug first; and quantity limits, which cap how much you can fill at once. These restrictions are easy to overlook, and they are often the cause of a pharmacy counter surprise on January 2.

Fourth, whether your pharmacy still gets the lower price. Many plans have preferred pharmacies with lower copays. A pharmacy you use could change status from one year to the next.

When the notice says a drug has a restriction or has moved, find it in the formulary and note the cost for the new year. If you take drugs that are costly or hard to substitute, ask your prescriber about alternatives before the end of the open enrollment window rather than after it. Your prescriber can often tell you in a single phone call whether an alternative is reasonable.

Look Hard at the Network and Service Area

Costs get the attention, but network and service area changes can be more disruptive. The ANOC may state that your plan’s service area is changing, and in rare cases a county may be removed. It may also mention changes to network or pharmacy arrangements, although many plans only list the high-level changes there. A doctor or hospital leaving a network may not appear as a line item in the notice at all.

That means the notice is not a substitute for checking your own providers. Look up each doctor, specialist, and hospital you use in the plan’s current directory, and then confirm by calling the office and giving them the exact plan name. Directories can be out of date. The office is the one that knows which contracts it currently holds.

If you are in an HMO, the difference between in-network and out-of-network is large, because the plan may pay nothing for out-of-network care outside emergencies and urgent situations. In a PPO there is usually more flexibility, but costs for out-of-network care are higher. Our guides to HMO plans and PPO plans go through how each one handles this.

Fine-Print Phrases Worth Slowing Down For

Some wording in plan notices means more than it seems to. None of these is unusual, but each is worth pausing on.

• “Effective January 1” changes to benefits. This is the key phrase. Anything following it will be different when the year turns.
• “Prior authorization may be required.” This does not mean your service will be denied. It means someone has to ask first, and your doctor’s office does that. It also means a delay is possible.
• “Preferred” versus “standard” pharmacy cost-sharing. Using a non-preferred pharmacy can raise your copay.
• “Combined” or “in-network” limits. Know which one the maximum out-of-pocket applies to, because the figures differ.
• “Supplemental benefit” allowances. Dental, vision, hearing, and over-the-counter allowances often have yearly or per-service limits, and the amount may have changed.
• “Reduced” or “no longer covered.” Read these lines twice. They point to a benefit disappearing.

If something in the notice is unclear, the plan’s member services number on your card can explain it. Write down the date, who you spoke to, and what they said.

If Your Plan Is Leaving

Sometimes the notice is not an ANOC at all. If a plan is ending in your area, the plan organization must send a non-renewal notice at least 90 days before the coverage ends. For coverage ending December 31, that works out to about October 2, and some plan types, such as special needs plans, can follow different timing. This is a different letter. It tells you the plan will not be available next year.

If you get one, you are not left without options. When a plan’s contract with Medicare is not renewed, Medicare.gov says you get a window of December 8 through the last day of February to choose new coverage, and you can also use the regular window through December 7. A plan that is simply merged into another plan from the same company is generally treated differently from a non-renewal and does not open that window, so if your notice describes a consolidation, ask what options apply. If you are thinking of moving from a Medicare Advantage plan that is ending back to Original Medicare and a Medigap policy, Medicare.gov says you have a guaranteed right to buy a Medigap policy without health questions if you apply no earlier than 60 days before your Medicare Advantage coverage ends and no later than 63 days after it ends. The details depend on your timing and your state, so ask before you enroll in anything. Our page on Ohio’s Medigap rules explains how Medigap policies work in Ohio.

What If You Never Got One?

Plans mail the notice to enrollees, or send it electronically if you have opted in. If you do not see it by early October, check your email and any online account first. Then call the plan’s member services number and ask for it to be sent. You can also find the plan’s current documents on Medicare.gov and on the plan’s own website.

Do not assume that no news is good news. A missing notice is not a reason to skip the review. It is a reason to ask for it.

A Short Method for Getting Through It

Here is a workable process that takes an evening, not a weekend.

• Read the first pages of the ANOC and highlight every change you see.
• Sort the changes into costs, drugs, network, and benefits.
• For each change, ask one question: does this affect something I use?
• For anything that does, look it up in the Evidence of Coverage or ask the plan.
• Compare against alternatives in your county using the Medicare Plan Finder or with an independent agent, using your actual drug list and doctors.
• Decide before December 7. If you stay, you do nothing. If you move, the change takes effect January 1.

Frequently Asked Questions

When do I get my Medicare Annual Notice of Change?

Plans must deliver it by September 30. The longer Evidence of Coverage is due by October 15. If you have not received yours, contact the plan or look on its website.

Is the Annual Notice of Change the same as the Evidence of Coverage?

No. The notice summarizes what is changing for next year. The Evidence of Coverage is the full plan document with every detail of benefits, costs, and your appeal rights.

Do I have to respond to the Annual Notice of Change?

No. If you do nothing, your coverage generally continues under the new terms on January 1. You only act if you want to change plans.

What should I check first in the notice?

Check your drugs, your doctors, and the costs of the services you use most. Those three areas account for most of the surprises people report.

What if my plan is leaving my area?

You will receive a separate non-renewal notice. You can choose a new plan during the regular Annual Enrollment Period, and for a non-renewal there is an additional window from December 8 through the last day of February.