If you’re a Medicare beneficiary, you know that mail from the government isn’t always the most exciting thing to find in your mailbox. But there’s one letter arriving this fall that you absolutely cannot afford to toss in the recycling bin — your Medicare Annual Notice of Change (ANOC).
This document, which Medicare plans are required to send out each year, lays out every change coming to your coverage in the next plan year. And in 2026, those changes could be more significant than ever. Here’s everything you need to know about reading your ANOC, understanding what it means for your wallet, and taking action before it’s too late.
What Is the Annual Notice of Change (ANOC)?
The Annual Notice of Change (ANOC) is a document that every Medicare Advantage plan and Part D prescription drug plan must mail to its members by September 30 each year. It details any changes to your plan’s costs, coverage, and rules that will take effect starting January 1 of the following year.
Think of it as your plan’s “fine print” delivered right to your doorstep — but with real consequences if you ignore it. The ANOC tells you whether your premiums, deductibles, copays, and out-of-pocket maximums are going up. It also informs you about changes to your drug formulary, network of doctors and pharmacies, and any new benefits being added or removed.
If you’re enrolled in Original Medicare with a Medigap supplemental plan, you may still receive notices about changes to your Part D prescription drug coverage or Medicare Advantage plan if you have one.
What’s Changing for 2027 Coverage — And Why It Matters
Based on recent Medicare policy trends and regulatory updates, beneficiaries should be on the lookout for several key changes in their 2027 ANOC letters:
1. Premium and Deductible Increases
Medicare premiums have been trending upward, and 2027 is expected to continue that pattern. The Medicare Part B premium — which covers doctor visits, outpatient care, and medical equipment — is projected to rise. Your ANOC will show exactly how much more you’ll be paying per month if you stay in your current plan. For many seniors on fixed incomes, even a small increase can stretch an already tight budget.
2. Drug Formulary Changes
Prescription drug formularies change every year. Medications can be moved to higher tiers (meaning you pay more), removed from coverage entirely, or new restrictions like prior authorization or step therapy can be added. Your ANOC will include a detailed list of these changes. If one of your daily medications is affected, you’ll want to know before you get to the pharmacy counter in January.
3. Provider and Pharmacy Network Changes
Doctors retire, hospitals change contracts, and pharmacies leave networks. Your ANOC will tell you if your preferred primary care physician, specialist, or pharmacy will no longer be in-network starting January 1. If you have a trusted doctor you’ve been seeing for years, this is the section you need to study carefully.
4. Benefit Reductions or Additions
Some Medicare Advantage plans are reducing supplemental benefits like dental, vision, hearing, or over-the-counter allowances. Others may be adding new perks like fitness memberships or meal delivery programs. Your ANOC will outline exactly what’s changing so you can decide if your plan still offers the value you need.
Don’t Wait Until Open Enrollment to Act
The Medicare Annual Enrollment Period (AEP) runs from October 15 to December 7 each year. That’s your window to switch Medicare Advantage plans, change Part D plans, or return to Original Medicare. But here’s the catch — if you wait until October 15 to start reading your ANOC, you might not have enough time to make an informed decision.
Here’s a smarter timeline:
Late September: Watch your mailbox for your ANOC. Mark the date you receive it.
First week of October: Read through the ANOC carefully. Highlight any changes that affect your costs, medications, or doctors. Make a list of concerns.
October 1–14: Use Medicare’s Plan Finder tool at Medicare.gov to compare your current plan against other options in your area. Check if your medications are covered, your doctors are in-network, and the total annual cost is lower elsewhere.
October 15–November 30: Enroll in a new plan if needed. Don’t wait until the last week of AEP — give yourself time to confirm your new plan’s details.
December 7: AEP deadline. Make sure any enrollment changes are submitted before midnight.
The Biggest Mistake Beneficiaries Make — And How to Avoid It
The single most common mistake Medicare beneficiaries make during open enrollment is doing nothing. Studies consistently show that a majority of Medicare Advantage enrollees never compare their current plan against others during AEP. They assume their plan will be roughly the same from year to year and simply let auto-renewal kick in.
That assumption can be costly. Plans change their premiums, deductibles, formularies, and networks every single year. A plan that was the perfect fit for you in 2026 may leave you with unexpectedly high costs and fewer provider choices in 2027. The difference between reviewing your options and doing nothing can easily be thousands of dollars in out-of-pocket costs — not to mention the stress of discovering in January that your primary care doctor is no longer covered or your blood pressure medication has been dropped from the formulary.
Take the time to read your ANOC. Compare your plan against others available in your area. And if you find a better option, make the switch during AEP. It’s one hour of your time that could save you money and headaches all year long.
What About Medigap Beneficiaries?
If you have Original Medicare with a Medigap (Medicare Supplement) plan, your situation is different — but you still need to pay attention. Medigap plans are standardized (Plan A, Plan B, Plan G, Plan N, etc.), so your benefits don’t change from year to year the way Medicare Advantage plans do. However, your Medigap premiums can still increase based on your insurer’s rate adjustments.
If you also have a standalone Part D prescription drug plan, you’ll receive a separate ANOC from that plan. Review it carefully, especially if you take regular medications. Part D plans can change their formularies and tier structures annually, which could significantly impact your out-of-pocket drug costs.
Unlike Medicare Advantage enrollees, Medigap beneficiaries don’t have the same guaranteed-issue rights during AEP. If you want to switch Medigap plans, you may need to go through medical underwriting depending on your state and situation. That’s why it’s especially important to choose the right Medigap plan when you first enroll during your Medigap Open Enrollment Period.
Take Action Today — Your Future Self Will Thank You
Your Medicare Annual Notice of Change isn’t junk mail — it’s your roadmap to making smart, informed decisions about your healthcare coverage for the year ahead. When that envelope arrives in September, open it, read it, and act on it.
If you’re unsure whether your current plan still meets your needs — or if you’re considering switching to a Medicare Supplement plan for more predictable costs and broader provider choice — we’re here to help.
Visit MedigapPlanFinders.com today to compare free quotes for Medicare Supplement plans in your area. Our team can help you find a plan that fits your budget and gives you the peace of mind you deserve.
