Medicare Part D

Same prescription, new rules in 2026? What Vacaville's ANOC packet is trying to tell you

VACAVILLE, Calif. — The thick envelope that Medicare drug plans mail every fall has a boring name and a big job. It is the Annual Notice of Change, or ANOC, and for people on Part D or a Medicare Advantage plan with drug coverage, it is the one document that spells out how next year's plan will treat the medications you already take.

For 2026, those changes matter more than usual. Part D now has a hard out-of-pocket cap of $2,100, the maximum deductible any plan can charge is $615, and the old "donut hole" is gone — replaced by a simpler three-phase design that started in 2025. Against that backdrop, plans are still allowed to rework their drug lists, move medications between tiers, and add or drop rules like prior authorization. A drug that was easy to fill in December can look different on January 1, even if your card and premium look the same.

What the ANOC actually is

The ANOC is a plain-language comparison document. Your plan is required to send it before the Annual Enrollment Period so you can see, side by side, how this year's plan differs from next year's. It covers premiums, the deductible, cost-sharing, the pharmacy network, and — the part people miss — the formulary, which is the list of drugs the plan covers and the rules attached to each one.

If you throw the ANOC away with the junk mail, you lose your best early warning that something about your prescriptions is about to change.

Why a "covered" drug can still change

Drug coverage is not just yes or no. Every covered medication sits on a tier, and each tier has its own cost-sharing. Plans typically use tiers for preferred generics, generics, preferred brands, non-preferred drugs, and specialty drugs. From one year to the next, a plan can:

• Move a drug to a higher or lower tier, which changes what you pay at the counter.
• Add prior authorization, meaning your prescriber has to send the plan clinical information before it will cover the drug.
• Set a quantity limit, capping how much you can get in a given period.
• Require step therapy, meaning you try a preferred alternative first before the plan covers the drug you were on.
• Remove a drug from the formulary entirely, or add a new one.

None of this means the plan is doing something wrong. Formularies change every year as generics enter the market, new drugs are approved, and plans renegotiate with manufacturers. But the effect on your monthly routine can be real.

How to read your ANOC without a headache

Set aside 20 minutes and a highlighter. Then work through it in this order:

1. Find the drug list section. Look up every prescription you take by name and dose. Note the tier for 2025 and the tier for 2026. 2. Check the symbols or footnotes. Plans use short codes for prior authorization (PA), quantity limits (QL) and step therapy (ST). If any of those appear next to your drug for 2026 but not 2025, flag it. 3. Look at the pharmacy network. Preferred pharmacies can change, and that affects what you pay even when the drug and tier stay the same. 4. Read the deductible and cost-sharing summary. The 2026 maximum Part D deductible is $615, but plans can set it lower. Confirm what your plan is doing. 5. Note the $2,100 cap. Once your out-of-pocket spending on covered Part D drugs hits $2,100 in 2026, you pay $0 for covered drugs the rest of the year.

If the math on any expensive month worries you, ask about the Medicare Prescription Payment Plan, a new option that lets you spread your Part D out-of-pocket costs across the calendar year in monthly bills instead of paying at the pharmacy counter.

Vacaville and Solano County: where to compare

Vacaville is in Solano County, where Medicare plan availability is set at the county level. That means every stand-alone Part D plan and every Medicare Advantage plan with drug coverage sold in Solano County is available to Vacaville residents. During the Annual Enrollment Period — Oct. 15 through Dec. 7 — you can switch stand-alone Part D plans, switch between Original Medicare and Medicare Advantage, or change Medicare Advantage plans, with the new coverage taking effect Jan. 1.

If you are already in a Medicare Advantage plan on Jan. 1 and something about the drug coverage is not workable, the Medicare Advantage Open Enrollment Period (Jan. 1 – March 31) gives you one more chance to switch to a different Medicare Advantage plan or return to Original Medicare with a stand-alone Part D plan.

If your drug is affected: what to do

You are not stuck. A few practical moves:

• Ask your prescriber whether a preferred alternative on the 2026 formulary would work clinically. Sometimes a therapeutic swap is easy; sometimes it is not.
• Request an exception. If your drug is moved to a higher tier or hit with a new restriction, your prescriber can ask the plan for a formulary or tiering exception, with a clinical reason.
• Use your transition fill. New plan members and continuing members whose drugs are affected by formulary changes generally get a temporary transition supply early in the new plan year. That gives you time to sort out an exception or a switch.
• Shop the market during AEP. If another plan available in Solano County covers your drug with fewer hoops, you can switch by Dec. 7 for a Jan. 1 start.

A note on higher-income households

If your income is above $109,000 as a single filer (or the equivalent joint threshold), you will pay an income-related monthly adjustment amount (IRMAA) on top of the standard Part D premium in 2026. That surcharge is separate from tiers and formularies, but it is worth factoring in when you compare plans.