Medicare Part D

How Part D Works in 2026: The $2,100 Cap Explained

ROSEBURG, Ore. — If you take prescription drugs and have Medicare, 2026 brings one of the biggest changes the program has seen in years. For the first time, there is a firm yearly limit on what you pay out of pocket for covered drugs under Part D — and the old "donut hole" is gone for good.

Here's a plain-language look at how Part D works this year, what the new numbers mean, and where Roseburg readers can get free help.

The headline number: a $2,100 out-of-pocket cap

In 2026, once you spend $2,100 out of pocket on covered prescription drugs in a calendar year, you pay $0 for the rest of the year on covered Part D drugs. That cap resets every January 1.

This is the second year of the hard cap that Congress set in the Inflation Reduction Act. In 2025 it was $2,000; for 2026 it moves to $2,100. The cap applies whether you get your Part D coverage as a stand-alone drug plan or built into a Medicare Advantage plan.

Only what you pay for covered drugs counts toward the cap — not your monthly premium.

The deductible: up to $615

Part D plans can charge a yearly deductible before coverage kicks in. For 2026, the maximum allowed deductible is $615. Plans can charge less than that (some charge nothing), but no plan can charge more.

If your plan has a deductible, you pay the full negotiated price for your drugs until you hit that amount. After that, you move into the next phase.

The three phases in 2026

Since 2025, Part D has just three phases instead of four. The coverage gap — the "donut hole" that used to raise costs in the middle of the year — is gone.

1. Deductible phase. You pay the full cost of your drugs (up to $615) until the deductible is met. Plans with no deductible skip this step.

2. Initial coverage phase. You pay a copay or a share of the cost (usually around 25%) for each covered drug. Your plan pays the rest. You stay in this phase until your total out-of-pocket spending reaches $2,100.

3. Catastrophic phase. Once you hit $2,100 out of pocket, you pay nothing for covered Part D drugs for the remainder of the calendar year.

Spreading the cost: the Medicare Prescription Payment Plan

Hitting $2,100 in January or February can still be a shock, even if the rest of the year is free. That's why Medicare offers the Medicare Prescription Payment Plan (sometimes called "M3P" or drug cost smoothing).

If you sign up, you still owe the same total for the year — but instead of paying the pharmacy at the counter, you get a monthly bill from your plan that spreads your drug costs across the remaining months. It doesn't lower what you owe; it just evens it out. Enrollment is free and voluntary, and you sign up through your Part D or Medicare Advantage plan.

A note on higher-income premiums (IRMAA)

Most people pay only their plan's Part D premium. But if your income is above $109,000 for a single filer (or $218,000 for a married couple filing jointly) in 2026, you'll pay an extra amount called IRMAA on top of your Part D premium. Social Security uses your tax return from two years earlier to set it. If your income has dropped since then — because of retirement, for example — you can ask Social Security to reconsider.

Local context for Roseburg

Roseburg sits in Douglas County, and that's the level where Medicare sets plan availability. Douglas County residents typically have a range of stand-alone Part D plans and Medicare Advantage plans that include drug coverage. The rules above — the $615 deductible cap, the $2,100 spending cap, the three phases — apply to every Part D plan sold in the county, no matter which one you choose.

For a plan-by-plan comparison based on the specific drugs you take, the Medicare Plan Finder at medicare.gov/plan-compare is the official tool.

Key deadlines to remember

• Annual Enrollment Period: October 15 – December 7. This is when you can join, switch, or drop a Part D or Medicare Advantage plan for the next year.
• Medicare Advantage Open Enrollment Period: January 1 – March 31. If you're already in a Medicare Advantage plan, you get one chance to switch to another MA plan or return to Original Medicare with a stand-alone Part D plan.