Medicare Advantage

Part D's 2027 Cap and Payment Plan: Cambridge Guide

Medicare's Part D drug cap rises to $2,400 in 2027: what Cambridge residents should know before Dec. 7.

CAMBRIDGE, Mass. — If you've been trying to make sense of Medicare's moving parts, the picture keeps getting clearer heading into 2027. A hard ceiling on what you can pay out of pocket for prescription drugs, a set maximum deductible, and steady program-level rules give people on Medicare something they haven't always had: a predictable cost structure.

For Cambridge residents weighing their options during this fall's Annual Enrollment Period, the choice isn't just about counting plans. It's about understanding how the pieces of Medicare's price tag fit together — so you know what you're comparing.

The 2027 cost structure, piece by piece

Medicare isn't one bill. It's a stack of them, and knowing which piece does what makes the annual review far less stressful.

Part A (hospital coverage). Most people pay no premium for Part A because they or a spouse paid Medicare taxes long enough while working. Part A has its own deductible and coinsurance for inpatient stays, set at the federal level each year.

Part B (doctor and outpatient coverage). Part B has a standard monthly premium that everyone pays, plus an annual deductible. After that, Medicare generally covers 80% of approved services and you're responsible for the other 20% — unless you have additional coverage that fills that gap.

Part D (prescription drugs). This is where the recent changes land hardest. The maximum deductible any Part D plan can charge is $615 in 2026 and $700 in 2027. Once you hit the plan's out-of-pocket limit — $2,100 in 2026 and $2,400 in 2027 — you pay nothing more for covered drugs for the rest of the calendar year.

Medicare Advantage (Part C). These plans bundle Parts A and B, and usually Part D, into one plan run by a private insurer under Medicare's rules. Costs and cost-sharing structures vary by plan.

Why the Part D cap matters

Before 2025, Part D had four phases and a "donut hole" where costs could spike unexpectedly. Now there are three phases — deductible, initial coverage, and catastrophic — and the yearly ceiling means no one on a Part D plan will pay more than that amount out of pocket for covered prescriptions. The cap is $2,100 in 2026 and $2,400 in 2027.

For anyone taking expensive medications, this is the single biggest structural change Medicare has made in years. It doesn't lower any specific drug's price, but it puts a firm lid on your yearly exposure.

There's also an optional feature called the Medicare Prescription Payment Plan. It lets you spread your Part D out-of-pocket costs across monthly installments instead of paying large amounts at the pharmacy counter. You don't pay more overall — it just smooths the timing.

What higher earners should know: IRMAA

Most people pay the standard Part B and Part D premiums. But if your income is above certain thresholds, you'll owe an Income-Related Monthly Adjustment Amount, or IRMAA, on top.

For 2026, IRMAA surcharges start above $109,000 in income for a single filer (roughly double that for joint filers). Social Security uses your tax return from two years earlier to make the determination. If your income has dropped since then — because of retirement, for example — you can request a reconsideration.

How the Cambridge market fits in

Plan availability in Medicare is set at the county level. Cambridge is in Middlesex County, where 49 Medicare Advantage plans were offered for 2026 by 9 different carriers; the 2027 lineup is detailed in each plan's ANOC and on Medicare.gov's Plan Finder. Stand-alone Part D plans, for people staying with Original Medicare, are shopped separately through Medicare's Plan Finder.

Middlesex County is home to more than 267,000 residents age 65 and older, so it's a large and closely watched market. But "more plans" doesn't automatically mean "easier choice." The right question isn't how many exist — it's which cost structure fits your medications, your doctors, and your budget.

A simple way to think about your review

Before Dec. 7, try walking through the cost pieces in order:

1. What will you pay in premiums? Include Part B, any Medicare Advantage or Medigap premium, and any Part D premium. 2. What are the deductibles? Part B has one; Part D plans may have one up to $615 in 2026 ($700 in 2027). 3. What's your expected out-of-pocket exposure? For drugs, the cap ($2,100 in 2026, $2,400 in 2027) is now your worst-case Part D scenario for covered medications. 4. Does IRMAA apply to you? If your income crossed the threshold, factor that surcharge in.

That's the whole cost picture in four questions.

Where to get unbiased help

You don't have to figure this out alone, and you shouldn't have to buy anything to get real answers.

• medicare.gov — the official Plan Finder lets you enter your drugs and pharmacies and compare plans available in your ZIP code.
• 1-800-MEDICARE (1-800-633-4227) — available 24/7.
• SHINE (Massachusetts' SHIP) — free, one-on-one counseling from trained volunteers who don't sell insurance.

Mark your calendar for the two windows that matter: the Annual Enrollment Period, Oct. 15 through Dec. 7, and the Medicare Advantage Open Enrollment Period, Jan. 1 through March 31, when people already in an MA plan can make one change.