Medicare Part D

Oakland Medicare Part D: $2,100 cap arrives in 2026

OAKLAND, Calif. — If you take prescription drugs and you're on Medicare, 2027 continues some of the biggest Part D changes in years. The good news: the rules are simpler than they used to be, and there's a hard ceiling on what you'll pay out of pocket for covered drugs in a calendar year.

Here's a plain-language walk-through of how Part D works in 2027, what the numbers mean, and where to go for help.

What Part D is, in one paragraph

Medicare Part D is the part of Medicare that helps pay for prescription drugs. You can get it two ways: as a stand-alone drug plan added to Original Medicare, or built into a Medicare Advantage plan that includes drug coverage. Either way, private insurers run the plans, but the rules — including the yearly deductible limit and the out-of-pocket cap — are set by Medicare. Oakland is in Alameda County, where residents have several stand-alone Part D plans and 22 Medicare Advantage plans from 10 carriers with drug coverage to choose from during enrollment periods in 2027.

The two numbers to remember in 2027

Two figures do most of the heavy lifting when you're trying to understand your drug costs next year:

• $700 — the highest deductible any Part D plan can charge in 2027. Some plans set a lower deductible, or none at all, but no plan can go above this.
• $2,400 — the most you'll pay out of pocket for covered Part D drugs in 2027. Once your spending on covered drugs hits that amount, you pay nothing for the rest of the calendar year.

That $2,400 cap is a big deal. Before 2024, there was no yearly limit on Part D out-of-pocket costs, and people on expensive medications could spend many thousands of dollars a year. The cap was introduced under the Inflation Reduction Act and adjusts each year.

The three phases of Part D in 2027

The old "donut hole" coverage gap was eliminated in 2025. So starting in 2025 and continuing in 2027, Part D has just three phases:

1. Deductible phase. You pay the full negotiated price for your drugs until you meet your plan's deductible (no more than $700 in 2027). If your plan has no deductible, you skip this phase.

2. Initial coverage phase. After the deductible, you pay a copay or coinsurance for each prescription, and your plan pays the rest. You stay in this phase until your out-of-pocket spending on covered drugs reaches $2,400.

3. Catastrophic phase. Once you hit $2,400 out of pocket, you pay nothing for covered Part D drugs for the rest of the year.

That's it. Three phases, one clear ceiling.

The Medicare Prescription Payment Plan

Hitting $2,400 in January or February can still hurt if it lands as one big pharmacy bill. That's why Medicare offers an optional program called the Medicare Prescription Payment Plan (sometimes called "M3P" or drug cost smoothing).

Here's how it works: instead of paying the pharmacy at pickup, you pay nothing at the counter and your plan bills you monthly, spreading your yearly drug costs across the remaining months of the year. It doesn't lower what you owe overall — it just smooths the timing.

This program is voluntary. You have to opt in through your Part D plan. It tends to help most if you have high drug costs early in the year. If your drug costs are low and steady, it may not make much difference.

What higher earners should know about IRMAA

Most people pay only their plan's premium for Part D. But if your income is above a certain threshold, Medicare adds a surcharge called IRMAA (Income-Related Monthly Adjustment Amount) on top of your Part D and Part B premiums.

For 2026, IRMAA kicks in for single filers with income above $109,000, and for married couples filing jointly above roughly double that. Medicare uses your tax return from two years earlier to decide. If your income has dropped since then — for example, because you retired — you can ask Social Security to reconsider.

When you can make changes

You can't switch Part D plans whenever you want. The main windows are:

• Annual Enrollment Period: Oct. 15 – Dec. 7. This is when most people compare and change plans for the following year.
• Medicare Advantage Open Enrollment: Jan. 1 – March 31. If you're in a Medicare Advantage plan, you can switch to another Advantage plan or drop back to Original Medicare with a stand-alone Part D plan.

Special Enrollment Periods can also open up if you move, lose other coverage, or qualify for Extra Help.

How to decide what fits you

There's no single "right" Part D setup — the best fit depends on which drugs you take, which pharmacies you use, and whether you also want medical coverage bundled in. A few questions worth asking before you pick:

• Are all my current medications on the plan's formulary (drug list)?
• What tier is each drug on, and what's the copay?
• Is my preferred pharmacy in the plan's preferred network?
• Do I qualify for Extra Help (the low-income subsidy)?
• Would monthly smoothing through the Prescription Payment Plan make my cash flow easier?

The Medicare Plan Finder at medicare.gov lets you enter your drugs and ZIP code and see how each available plan would treat your specific prescriptions.