Why you should check your Medicare drug plan every fall, even if your prescriptions have not changed

Every September, a thick envelope or an unassuming email arrives from your Medicare Part D or Medicare Advantage plan. Titled the Annual Notice of Change, or ANOC, it is easy to set aside, especially if your health feels stable and your prescriptions have remained the same for years.

Yet assuming your coverage will stay identical from one year to the next is one of the most expensive assumptions a beneficiary can make. Plans routinely adjust their formularies—the master list of drugs they cover—as well as their pricing tiers, pharmacy networks, and approval rules. A medication that cost ten dollars a month in December can jump significantly in January, simply because the insurance company reclassified it.

Taking half an hour to review your coverage each autumn is not an admission of declining health. It is straightforward financial maintenance.

Formularies shift even when your health does not

Medicare prescription drug plans are private contracts approved by Medicare, and private insurers alter those contracts annually. They negotiate new pricing with drug manufacturers and pharmacies every calendar year. As a result, three common changes happen behind the scenes:

• Tier movement: Most plans organize medications into tiers, from low-cost generics (Tier 1) to high-cost specialty drugs (Tier 5). An insurer might move a common blood pressure or cholesterol medication from Tier 2 to Tier 3, doubling your copayment overnight.
• Network changes: A pharmacy that was considered "preferred" this year may drop to "standard" next year, or fall out of the network entirely. Filling prescriptions at a standard pharmacy often incurs noticeably higher out-of-pocket costs.
• Utilization restrictions: Plans can add prior authorization requirements, step therapy (requiring you to try an alternative drug first), or quantity limits to medications you have taken smoothly for a decade.

None of these changes require a change in your own health. They happen entirely on the plan's side of the ledger.

Using the Medicare Plan Finder effectively

You do not need to read through hundreds of pages of fine print to see how next year affects you. Medicare maintains a free, secure tool called the Medicare Plan Finder on Medicare.gov.

To make the comparison painless, gather your current prescription bottles before you sit down at the computer. You will want the exact name of each medication, the dosage (such as 20 mg), and how often you fill it (such as a 30-day or 90-day supply).

When you log in to your personal account on Medicare.gov, the system can automatically pull in the medications you currently take. From there, you can view your current plan's projected costs for the coming year side-by-side with every other plan offered in your zip code. The tool sorts plans by total estimated annual cost—which combines your monthly premiums with your expected out-of-pocket drug costs at your preferred pharmacy.

Where to find unbiased guidance

If comparing plans online feels daunting, you do not have to do it alone, nor do you have to rely on commercial insurance brokers who may represent only a subset of available carriers.

Every state funds a State Health Insurance Assistance Program, commonly known as SHIP. SHIP counselors provide free, completely objective, one-on-one Medicare counseling. They do not sell insurance, work on commission, or endorse specific private companies. A SHIP counselor can sit with you, enter your medications, and walk through your options without sales pressure.

Fall open enrollment runs from October 15 through December 7 each year. Setting aside one quiet afternoon to verify your drug coverage ensures that your healthcare budget serves you well into the new year, leaving no room for surprises at the pharmacy counter.