Medicare Part D

Erie Part D shoppers: how a tier, a prior auth or a step therapy rule can flip a covered drug

ERIE, Pa. — The envelopes are already landing in mailboxes across Erie County. Every fall, Medicare Part D and Medicare Advantage prescription plans send out an Annual Notice of Change, or ANOC, spelling out what will be different about the plan on January 1. And every fall, a lot of people set it aside unread — then get a surprise at the pharmacy counter in February.

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With the Annual Enrollment Period running October 15 through December 7, 2026, this is the window to read that notice, check your medications against the 2027 drug list, and decide whether to stay put or switch.

What actually changes on a drug list from year to year

A Part D plan's drug list — the formulary — is not fixed forever. Each year, plans refile with Medicare and can adjust which drugs they cover and how. Four levers matter most:

Tiers. Most formularies sort drugs into tiers, usually preferred generics, generics, preferred brands, non-preferred brands, and specialty. The higher the tier, the more you generally pay. A drug you took all year on a lower tier can move up a tier for the new plan year, which changes your share of the cost even though the drug is still "covered."

Prior authorization. The plan may require your doctor to send paperwork explaining why you need a particular drug before it will pay. Same medication, same dose — new hoop.

Quantity limits. The plan caps how much it will cover in a certain period. A 90-day fill you have been getting may drop to 30 days, or a higher dose may need extra approval.

Step therapy. The plan may require you to try a lower-cost option first and only cover the more expensive drug if the first one does not work or is not tolerated.

None of these mean the drug is off the list. They mean the path to getting it changed.

How to read the ANOC without losing an afternoon

The ANOC is not light reading, but you do not have to read every page. Focus on:

• The section that compares 2026 cost sharing to 2027.
• The list of formulary changes — what moved tiers, what is being removed, and what utilization rules (prior authorization, step therapy, quantity limits) are new.
• The pharmacy network section, because a "preferred" pharmacy in 2026 may not be preferred in 2027.
• Any note about the plan being renewed, consolidated, or discontinued.

Then pull out your actual prescription bottles and match them against the plan's 2027 formulary, which is posted separately. If a drug is not listed, or has a new PA, QL or ST code beside it, that is your signal to act before December 7.

The Part D rules that apply to every plan in 2027

Some things are set by Medicare, not by individual plans. For 2027:

• The Part D out-of-pocket cap is $2,400 in 2027 (it is $2,100 in 2026). Once your covered drug spending reaches the cap, you pay $0 for covered drugs the rest of the year.
• The maximum deductible any Part D plan can charge is $700 in 2027 (it is $615 in 2026). Plans can charge less.
• The coverage gap is gone. As of 2025, Part D has three phases — deductible, initial coverage, catastrophic — not four.
• The Medicare Prescription Payment Plan lets you spread your drug costs into monthly bills instead of paying large amounts at the pharmacy counter. It is optional and free to opt into.
• IRMAA surcharges for higher-income beneficiaries begin above $109,000 in income for a single filer in 2026.

These apply whether you have stand-alone Part D or drug coverage built into a Medicare Advantage plan.

What to do if a change hits a drug you take

You have options, and none of them require panic:

You have options, and none of them require panic: 1. Ask for a transition fill. When you first enroll or when a plan changes its formulary, Medicare requires plans to provide a temporary supply of drugs you were already taking, so you have time to work things out with your doctor. 2. File an exception request. Your prescriber can ask the plan to cover a non-formulary drug or to waive step therapy or quantity limits based on medical need. 3. Compare plans on medicare.gov. The Plan Finder lets you enter your specific drugs and pharmacies and see how each 2027 plan in Erie County treats them. 4. Consider switching during AEP. Between October 15 and December 7, 2026, you can change your Part D plan or Medicare Advantage plan for a January 1, 2027 start. If you are in a Medicare Advantage plan and want to make a change after that, the Medicare Advantage Open Enrollment Period runs January 1 through March 31, 2027.

Where Erie residents can get free, unbiased help

Erie is in Erie County, where a range of Part D and Medicare Advantage prescription drug plans are offered each year. Availability and formularies are set at the county level, so a plan available in Erie is available across Erie County.

For personalized help — someone who will sit with you and read the ANOC line by line — Pennsylvania's State Health Insurance Assistance Program is called APPRISE, and it is free. You can also call 1-800-MEDICARE (1-800-633-4227), 24 hours a day, or use the Plan Finder at medicare.gov.