Medicare Part D

Medicare Part D deductible and three phases in Fairfield

# How Medicare Part D works in 2027: deductible, the cap, and the three…

FAIRFIELD, Ohio — If you take prescription drugs and have Medicare, the Part D changes that reshaped the program carry into 2027. The coverage gap — that confusing "donut hole" people used to dread — is gone. In its place is a simpler three-phase design with a firm ceiling on what you'll pay out of pocket for covered drugs each year.

Here in Fairfield, that matters. Whether you get your drug coverage through a stand-alone Part D plan or bundled into a Medicare Advantage plan, the same federal rules shape what you owe at the pharmacy counter.

Phase 1: The deductible

This is what you pay first, before your plan starts sharing the cost. The most a Part D plan can charge as a deductible is $615 in 2026 and $700 in 2027, according to CMS. Some plans charge less, and some charge nothing at all for certain drug tiers. Once you've paid the deductible amount for your covered drugs, you move to the next phase.

Phase 2: Initial coverage

In this phase, you and your plan share the cost. You'll typically pay a copay (a flat dollar amount) or coinsurance (a percentage) for each prescription. What you pay depends on the drug's tier in your plan's formulary — the list of drugs it covers.

You stay in this phase until your out-of-pocket spending on covered drugs reaches the yearly cap.

Phase 3: Catastrophic coverage — and the annual cap

Here is the headline change. Starting in 2025, once your out-of-pocket spending on covered Part D drugs reaches the annual cap, you pay nothing for covered drugs for the rest of the calendar year. The cap is $2,100 in 2026 and $2,400 in 2027. This is a hard cap set by federal law.

Before 2025, there was no annual limit — some people with serious illnesses paid thousands more each year. That's no longer the case.

Two important notes:

• Only what you spend on covered drugs counts toward the cap. Drugs your plan doesn't cover don't count.
• Monthly plan premiums don't count toward the cap either.

Spreading the cost: the Payment Plan option

A big out-of-pocket bill early in the year can still sting, even with the cap in place. That's why Medicare now offers the Medicare Prescription Payment Plan. If you opt in, your plan bills you monthly instead of making you pay large amounts at the pharmacy. It doesn't lower your total cost — but it spreads it out, which helps with budgeting on a fixed income. It's free to join, and you can sign up through your plan.

What Fairfield residents should know locally

Fairfield is in Butler County, where residents can choose from a range of stand-alone Part D plans and Medicare Advantage plans that include drug coverage. Plan availability, formularies, and pharmacy networks vary by county, so a plan a friend uses in another state may not be offered here. The Medicare Plan Finder at medicare.gov lets you enter your ZIP code and your prescriptions to see what's available in Butler County and how each plan would handle your specific drugs.

Common mistakes to avoid

• Skipping Part D when you first become eligible. If you don't have other creditable drug coverage and delay signing up, you can face a lifelong late enrollment penalty added to your premium.
• Assuming every plan covers your drugs. Formularies differ. A drug covered in one plan may not be covered — or may cost much more — in another.
• Ignoring Annual Enrollment. From October 15 to December 7, 2026, you can review and change your Part D or Medicare Advantage plan for 2027. Plans change their formularies and costs annually, so what worked in 2026 may not be the best fit for 2027.
• Overlooking IRMAA. Higher-income beneficiaries pay an added surcharge on Part D premiums. For 2026, IRMAA begins above $109,000 for a single filer.