Medicare Part D

Same Drug, New Rules in January? What Your ANOC Is Trying to Tell You

# Same Drug, New Rules in January? What Your ANOC Is Trying to Tell You

ARLINGTON HEIGHTS, Ill. — The envelope shows up in late September, usually thicker than people expect. It's called the Annual Notice of Change, or ANOC, and for anyone with a Medicare Part D drug plan or a Medicare Advantage plan that includes drug coverage, it is the single most important piece of mail of the year. It tells you exactly how your plan will be different on January 1 — including whether the prescriptions you take every morning will still be covered the same way.

With the Annual Enrollment Period running October 15 through December 7, 2026, the ANOC is your window to compare before the deadline. And in 2027, with the Part D out-of-pocket cap rising to $2,400, the details buried in that notice matter more than they used to.

Why a "covered" drug can still change

A Part D formulary — the plan's drug list — is not frozen in place. Plans can change which drugs they cover, and how they cover them, from one plan year to the next. That means a medication you filled every month in 2025 might, on January 1, sit on a different tier, require your doctor to get approval first, or come with a monthly quantity limit.

Here is what the terminology actually means:

• Tiers. Plans sort drugs into tiers (often 1 through 5 or 6). Lower tiers are usually generics; higher tiers hold brand-name or specialty drugs. Moving to a higher tier generally means a bigger share of the cost falls on you until you hit the annual cap.
• Prior authorization (PA). Before the plan will pay, your prescriber has to send documentation showing the drug is medically necessary for you.
• Quantity limits. The plan will only fill up to a certain amount in a set time — for example, a set number of tablets per 30 days.
• Step therapy. You have to try a preferred (usually cheaper) drug first. Only if that one doesn't work will the plan cover the drug your doctor originally wrote for.

None of these are new. But they can be added to a specific drug, or dropped, at the plan-year turnover. That's the surprise people run into at the pharmacy counter in January.

How to actually read the ANOC

The ANOC is organized as a side-by-side: your 2026 plan versus the 2027 version. Skip to the sections that matter to your wallet.

1. Find the drug list section. Look for language about the formulary and whether any of your prescriptions have moved tiers, been removed, or now carry PA, step therapy, or quantity limits. 2. Check the pharmacy network. Preferred pharmacies can change, and using a non-preferred pharmacy usually costs more. 3. Look at the deductible and cost-sharing. The maximum Part D deductible any plan can charge is $615 in 2026 and $700 in 2027, but plans can set it lower. 4. Confirm your plan is still offered. Occasionally a plan is discontinued, in which case you'll get a separate non-renewal notice and will need to pick a new one.

If you can't find your medications listed, that itself is worth a phone call — a drug missing from the formulary is different from a drug that simply isn't in the ANOC's "changes" table.

What to do if a drug you take is changing

You have options, and none of them require panic.

• Compare plans during AEP (Oct. 15 – Dec. 7, 2026). The Plan Finder at medicare.gov lets you enter your specific prescriptions and see how each plan in your area would treat them in 2027.
• Ask for a transition fill. New enrollees, and current enrollees whose drug status changes, are typically entitled to at least one 30-day supply early in the year while things get sorted out. Ask the plan directly.
• File a formulary exception. Your prescriber can request that the plan cover a non-formulary drug, waive step therapy, or lift a quantity limit based on medical necessity.
• Look into the Medicare Prescription Payment Plan. This optional program lets you spread your Part D out-of-pocket costs over monthly payments across the plan year instead of paying big amounts at the pharmacy.

The Arlington Heights context

Arlington Heights is in Cook County, where retirees generally have a wide range of stand-alone Part D plans and Medicare Advantage plans with drug coverage to choose from. Because availability and formularies are set at the county level, two neighbors on the same street can be enrolled in different plans with very different drug lists. That's part of why the ANOC is a personal document — the changes it describes are the changes to your plan, not to Medicare as a whole.

If you missed AEP or want another look, people already enrolled in a Medicare Advantage plan get a second window from January 1 through March 31 to switch Medicare Advantage plans or return to Original Medicare (with a stand-alone Part D plan). That second window doesn't apply to stand-alone Part D switches outside of AEP except in specific situations.

Where to get unbiased help

You do not have to sort this out alone, and you do not have to use a salesperson.

• medicare.gov — the official Plan Finder lets you compare plans using your actual drug list and preferred pharmacy.
• 1-800-MEDICARE — available 24/7 for questions about coverage, enrollment, and appeals.
• Illinois SHIP (Senior Health Insurance Program) — free, one-on-one Medicare counseling from trained volunteers who don't sell plans.