Your Medicare Annual Notice of Change is the fall document that tells you how your current Medicare Advantage or Part D plan will change next year.
Do not ignore it. If your premium, copays, drug coverage, pharmacy pricing, doctor network, or prior authorization rules change, this notice is often your first warning before Medicare Open Enrollment starts on October 15.
It does not automatically mean you should switch plans. It means you should check whether the plan still fits.
What Is the Annual Notice of Change?
The Annual Notice of Change, often called the ANOC, is a plan document that explains what will be different in the coming year.
You may receive one if you have:
- a Medicare Advantage plan
- a Medicare Advantage plan with drug coverage
- a standalone Medicare Part D prescription drug plan
The notice usually compares your current year’s plan details with next year’s plan details. Medicare says plans send this notice in September, and the printed copy is generally due by September 30.
That timing matters because Medicare Open Enrollment runs from October 15 through December 7. Changes made during that fall window usually start January 1.
Official reference: Medicare.gov: Plan Annual Notice of Change
Why This Notice Matters
A plan can keep the same name and still change in ways that matter.
For example, your notice may show:
- a higher monthly premium
- a different deductible
- higher specialist copays
- a different maximum out-of-pocket limit
- new or changed prior authorization rules
- drug tier changes
- medications removed from the formulary
- pharmacy network or preferred pharmacy changes
- dental, vision, hearing, or over-the-counter benefit changes
- service-area or provider-network changes
The mistake is assuming “same plan” means “same coverage.” It may not.
That is especially important for people who chose a plan because one doctor, one hospital system, or one prescription made the plan work. If that piece changes, the whole plan may feel different next year.
What Should You Check First?
Start with the parts of the plan you actually use.
If you have Medicare Advantage, check:
- your primary doctor
- specialists
- preferred hospitals
- referral rules
- prior authorization rules
- inpatient and outpatient copays
- maximum out-of-pocket limit
- dental, vision, hearing, and over-the-counter benefits
If you have Part D drug coverage, check:
- every prescription on your list
- each drug’s tier
- deductible changes
- copays and coinsurance
- prior authorization, step therapy, or quantity limits
- preferred pharmacy pricing
- mail-order pricing
- whether Extra Help changes the math
If the drug coverage is your main concern, read How to Compare Medicare Part D Plans Without Guessing and What Is a Medicare Part D Formulary?.
What If the Notice Says Your Plan Is Ending?
If your plan is ending or leaving Medicare, do not wait until December.
The notice should explain what is happening and what your options are. Depending on the situation, you may have a Special Enrollment Period. But the exact dates matter, and the replacement plan is not always the one you would choose if you compared carefully.
This is where people sometimes make rushed decisions. They see a plan termination notice, assume the suggested replacement is fine, and never check doctors, hospitals, prescriptions, or out-of-pocket exposure.
If you need the bigger timing map, start with Can You Change Medicare Plans Anytime?.
Should You Automatically Shop Every Year?
You should review every year. You do not automatically need to switch every year.
That distinction matters.
If your doctors are still in-network, your prescriptions still price well, your premium is reasonable, and the plan rules still fit, staying put may be the right decision. But staying because you checked is different from staying because the paperwork sat unopened on the counter.
I would be more cautious about renewing by default if:
- you take several prescriptions
- you use a preferred specialist or hospital system
- you had a new diagnosis this year
- you expect surgery, therapy, imaging, or expensive medication next year
- your plan added prior authorization rules
- your premium or maximum out-of-pocket limit changed
- your pharmacy moved from preferred to standard
Those are the situations where a small plan change can turn into a real cost or access problem.
Medicare Advantage vs. Part D: The Notice Means Different Things
For Medicare Advantage, the notice is usually about both medical and drug coverage if your plan includes Part D.
That means you need to check the medical side and the prescription side. A plan can look fine for doctors but poor for medications. It can also look good for prescriptions but create problems with hospitals, specialists, or prior authorization.
For standalone Part D, the notice is about drug coverage. That still matters a lot because formularies, preferred pharmacies, deductibles, and copays can change every year.
If you are weighing the bigger choice between Medicare Advantage and a Medicare Supplement, read Medicare Advantage vs Medigap in the Kansas City Area before making a fall change.
Do Not Confuse the ANOC With Marketing Mail
Fall Medicare mail can get noisy.
The Annual Notice of Change is not the same thing as a postcard, TV-ad offer, seminar invitation, or carrier sales brochure. It is a plan-specific document about your current coverage.
Look for language from your current plan explaining changes for the upcoming plan year. If you are not sure whether a document is official plan mail, call the customer service number on your current plan card, not a number from a sales mailer.
This is also a good time to be careful with phone calls and mailers that look official but are really lead-generation ads. If something seems off, the guide on how to spot a government imposter scam is worth reading.
Local Note for Kansas City and Missouri Beneficiaries
In the Kansas City area, plan changes can be very local.
A Medicare Advantage network change in Jackson County may not feel the same as one in Johnson County, Clay County, Platte County, or Lafayette County. Pharmacy pricing can also vary across Blue Springs, Lee’s Summit, Independence, Overland Park, North Kansas City, and nearby rural communities.
If your notice shows network or pharmacy changes, do not assume the plan still works just because a neighbor likes it. Medicare Advantage and Part D comparisons should be based on your ZIP code, your doctors, your prescriptions, and how you actually use care.
What I Would Do When the Notice Arrives
Here is the practical order I like:
- Open the Annual Notice of Change when it arrives.
- Circle premium, deductible, copay, maximum out-of-pocket, network, and drug changes.
- Update your medication list before October 15.
- Confirm your doctors and hospitals for the coming year.
- Compare your current plan against available options during Open Enrollment.
- Do not enroll in a new plan until the doctor and drug details are checked.
- Save a copy of the comparison and confirmation.
For people turning 65 soon, this annual review is separate from your first Medicare enrollment timing. If you are still sorting out the first enrollment steps, use the Medicare readiness checklist before comparing annual plan changes.
The Practical Bottom Line
The Annual Notice of Change is your early warning document.
It tells you what your Medicare Advantage or Part D plan is changing for next year. Sometimes the changes are minor. Sometimes they are enough to justify shopping during Medicare Open Enrollment from October 15 through December 7.
Open it, mark the changes, and compare the plan against your real doctors, prescriptions, pharmacy, and budget. That is how you avoid renewing a plan that no longer fits.
Frequently Asked Questions
What is the Medicare Annual Notice of Change?
It is the document your Medicare Advantage or Part D plan sends each fall to explain changes in coverage, costs, provider networks, drug coverage, and plan rules for the next year.
When should I get my Annual Notice of Change?
Medicare says plans send the Annual Notice of Change in September. The printed notice is generally due by September 30.
Do I need to change plans after reading it?
Not always. The notice tells you what is changing. You still need to compare those changes against your doctors, prescriptions, pharmacy, budget, and risk tolerance.
What happens if I do nothing after receiving the notice?
In many cases your plan renews for the next year, but you may be accepting higher costs, network changes, drug changes, or new plan rules without realizing it.
Is the Annual Notice of Change only for Medicare Advantage?
No. Standalone Medicare Part D plans also send Annual Notice of Change documents. If you have drug coverage, read the drug section carefully.