What Is the Medicare Annual Notice of Change?
If you have a Medicare Advantage plan or a Medicare Part D prescription drug plan, there is one document you should not ignore each fall: your Medicare Annual Notice of Change, often called the ANOC.
A Medicare Annual Notice of Change is the yearly document your plan sends explaining changes to coverage, costs, benefits, prescription drug rules, pharmacy arrangements, and other plan details for the following year.
And here is the part that catches people: your plan name may stay the same, your insurance card may look familiar, and your premium may not shock you at first glance — but the details underneath can still change.
That is why your ANOC is not just paperwork. It is your early warning system before Medicare Open Enrollment begins.
Key Takeaways
- Your Annual Notice of Change explains upcoming changes to your Medicare health or drug plan for the next year.
- Your plan sends the ANOC each fall, and you should receive it in September. If it does not arrive, contact your plan and request a copy.
- The changes described in the ANOC usually take effect January 1.
- You should review your prescriptions, doctors, pharmacies, costs, and benefits before Medicare Open Enrollment begins.
- Medicare Open Enrollment runs October 15 through December 7, and changes made during that period generally start January 1.
- You do not have to change plans every year — but you should review your plan every year.
1. What Is a Medicare Annual Notice of Change?
The Annual Notice of Change is a yearly notice from your Medicare plan that explains changes in your plan’s coverage, costs, and other details for the coming year.
If you are enrolled in a Medicare Advantage plan or a Medicare drug plan, this notice helps you compare your current coverage with what that same plan will look like next year.
Think of it as your plan saying: Here is what will be different starting January 1.
2. Who Receives a Medicare Annual Notice of Change?
You may receive an ANOC if you are enrolled in a Medicare plan that can change from year to year, such as:
Plans That Commonly Send an ANOC
- Medicare Advantage plans
- Medicare Advantage Prescription Drug plans
- Standalone Medicare Part D prescription drug plans
- Some other Medicare health or drug plans
If you only have Original Medicare and no separate Part D plan or Medicare Advantage plan, you generally will not receive an ANOC from a private Medicare plan because there is no private plan benefit package to update.
But if you have Part D, Medicare Advantage, or both, this notice matters.
3. When Does the Medicare Annual Notice of Change Arrive?
Medicare says your plan sends the Annual Notice of Change each fall, and you should receive it in September. The notice explains changes to coverage, costs, and other plan details that take effect January 1. If you do not receive your ANOC in September, contact your plan and request a copy.
That timing is important because Medicare Open Enrollment runs from October 15 through December 7. This gives you time to review the notice before deciding whether to keep your plan or compare other options.
4. What Should You Check in Your ANOC?
You do not need to memorize the entire packet. But you do need to review the areas most likely to affect your real-life costs and care.
| What to Check | Why It Matters |
|---|---|
| Monthly premium | Your premium may increase, decrease, or stay the same — but premium is only one part of the cost picture. |
| Deductibles | A higher deductible can change what you pay before the plan begins sharing costs. |
| Copays and coinsurance | Doctor visits, specialists, hospital care, drugs, and other services may cost more next year. |
| Prescription formulary | Your medication may move tiers, require prior authorization, have quantity limits, or be removed from the formulary. |
| Pharmacy network | Your preferred pharmacy may no longer be preferred, which can change what you pay for prescriptions. |
| Provider network | For Medicare Advantage plans, provider networks can change. Your ANOC may not identify every individual provider change, so verify your doctors and hospitals separately with both the plan and the provider. |
| Extra benefits | Dental, vision, hearing, over-the-counter allowances, transportation, and fitness benefits may change. |
| Service area | If a plan changes its service area, it may affect whether you can remain enrolled. |
The five things I would check first
Robin’s ANOC Review List
- Your prescriptions
- Your doctors and specialists
- Your pharmacy
- Your total expected costs
- Your benefits and coverage rules
If those five areas still work for you, keeping your plan may make sense. If one of them changed in a way that affects your care or budget, it is time to take a closer look.
5. What Is the Difference Between an ANOC and Evidence of Coverage?
Your Annual Notice of Change is not the same thing as your Evidence of Coverage.
The ANOC highlights what is changing for the next year. Your Evidence of Coverage, often called the EOC, is the fuller document that explains what your plan covers, what you pay, and how the plan works.
| Document | What It Tells You |
|---|---|
| Annual Notice of Change | What is changing in your plan for the next year. |
| Evidence of Coverage | The detailed rules, coverage, costs, and plan information for the year. |
The ANOC tells you where to focus. The EOC gives you the deeper details if you need to confirm exactly how something works.
6. What Should You Do if Your Medicare Plan Is Changing?
A change in your ANOC does not automatically mean you should switch plans. It means you should review your options before Open Enrollment ends.
Sometimes a plan changes and still works well for you. Other times, one small change can create a very expensive surprise.
Changes Worth Reviewing Closely
- A medication moved to a higher tier
- A medication now requires prior authorization or step therapy
- Your preferred pharmacy is no longer preferred
- Your doctor or hospital network changed
- Your specialist copay increased
- Your dental, vision, hearing, or over-the-counter benefit changed
- Your maximum out-of-pocket amount increased
Medicare Open Enrollment gives you a window to compare your current plan against other available plans for the next year. The goal is not to change just for the sake of changing. The goal is to avoid being surprised in January.
7. Do You Have to Change Medicare Plans After Receiving an ANOC?
If nothing important changed, that can be good news. Sometimes the best decision is to keep the plan you already have.
But I would still compare the plan against your current life, not just against last year’s paperwork.
Ask yourself:
Questions to Ask Before You Keep Your Plan
- Did I start any new prescriptions this year?
- Did I stop taking any medications?
- Did I add a specialist?
- Did my preferred pharmacy change?
- Did my budget change?
- Do I travel more or spend time in another state?
- Do I still like how I receive care?
Your plan can change. Your life can change. Both matter.
Frequently Asked Questions
What does ANOC stand for in Medicare?
ANOC stands for Annual Notice of Change. It explains changes to your Medicare health or drug plan for the next year, including coverage, costs, and other plan details.
When should I get my Medicare Annual Notice of Change?
Your plan sends the ANOC each fall, and you should receive it in September. If you do not receive it, contact your plan and request a copy.
Do I need to do anything if I like my current Medicare plan?
Not necessarily. If your plan still fits your prescriptions, doctors, pharmacies, costs, and care needs, keeping it may make sense. But you should still review it before Open Enrollment ends.
Does the ANOC mean my plan is ending?
Not necessarily. Most ANOCs explain changes to a plan that will continue next year. If your plan is ending or will no longer be available in your service area, your plan should send a separate nonrenewal notice explaining what is happening and what options may be available to you.
What is the difference between the ANOC and Evidence of Coverage?
The ANOC highlights changes for the next year. The Evidence of Coverage gives more complete details about what the plan covers, what you pay, and how the plan works.
What should I do after reading my ANOC?
Make a list of your current prescriptions, doctors, specialists, pharmacies, and expected costs. Then compare your current plan for the next year against other available options during Medicare Open Enrollment.
Can my Medicare plan change even if the plan name stays the same?
Yes. A Medicare Advantage or Part D plan may keep the same name while changing costs, covered prescriptions, pharmacy arrangements, provider networks, benefits, or other plan rules for the next year.
What happens if I ignore my Annual Notice of Change?
Your coverage may renew if the plan remains available, but you could miss changes affecting your prescriptions, doctors, pharmacies, benefits, coverage rules, or out-of-pocket costs.
Final Thoughts
Your Annual Notice of Change may not be exciting reading. I get it. Nobody is making popcorn and curling up with plan documents on a Friday night.
But this notice can tell you whether your plan is still working for the year ahead — or whether something changed that deserves a closer look.
You do not have to change Medicare plans every year. But you should review your plan every year.
Because the plan name can look familiar, the card can look familiar, and the premium can look familiar — while the details underneath quietly changed.
Your ANOC is not junk mail. It is your Medicare early warning system.
— Robin Dall, Medicare EducatorNo call centers, no 1-800 numbers — just Robin Dall, Medicare broker and educator, helping you understand your Medicare options before the surprises show up.
Want Help Reviewing Your Medicare Plan Changes?
Download the free Medicare Open Enrollment Checklist or request a personal Medicare review so you can compare your prescriptions, doctors, pharmacies, costs, and benefits before Open Enrollment ends.
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Official Medicare Sources
Not connected with or endorsed by the U.S. government or the federal Medicare program. This article is for educational purposes only and does not constitute insurance advice or a plan recommendation. Plan availability, premiums, benefits, networks, drug coverage, pharmacy arrangements, and costs vary by location and plan and can change each year. Always review your official plan documents and confirm details with Medicare.gov, your plan, or a licensed Medicare professional before making coverage decisions.
