Medicare Part D

$2,100 Part D cap arrives Jan. 1 for San Tan Valley

SAN TAN VALLEY, Ariz. — Starting Jan. 1, 2027, people with Medicare Part D drug coverage will see the yearly out-of-pocket cap at the pharmacy rise to $2,400. For anyone who has ever been blindsided by a big drug bill in the middle of the year, this is the change worth understanding before the Annual Enrollment Period ends Dec. 7.

What the $2,100 cap actually means

In 2027, once your out-of-pocket spending on covered Part D drugs hits $2,400 for the year, you owe nothing for the rest of your covered prescriptions through December 31. The cap resets each January.

This applies whether your drug coverage comes through a stand-alone Part D plan or is built into a Medicare Advantage plan that includes drugs. It only counts spending on drugs your plan covers — premiums don't count toward the cap, and neither do drugs your plan doesn't cover.

For context, the Part D out-of-pocket cap is $2,100 in 2026 and $2,400 in 2027, and it's indexed to rise gradually in future years. The Part D maximum deductible is $615 in 2026 and $700 in 2027, though many plans set a lower deductible.

The "donut hole" is gone — for good

If you've had Medicare for a while, you may remember the coverage gap, better known as the donut hole — that middle stretch where your share of drug costs jumped once you and your plan had spent a certain amount together.

That phase was eliminated in 2025 and stays gone in 2027. Part D now has just three phases: the deductible, the initial coverage phase, and the catastrophic phase (where you pay nothing after hitting the annual cap). It's a much simpler structure, and it's the reason the yearly cap can now do its job cleanly.

The Medicare Prescription Payment Plan: spread costs monthly

Even with a $2,400 ceiling in 2027, hitting a big cost early in the year — say, a prescription in January — can still hurt. That's where the Medicare Prescription Payment Plan comes in.

This is a free, optional program (sometimes called "M3P" or the "smoothing" option). Instead of paying the pharmacy at the counter, you pay $0 there, and your plan bills you monthly for what you would have paid, spread across the remaining months of the calendar year.

A few things to know before signing up:

• It doesn't lower your total drug costs — it just spreads them out.
• You have to opt in with your Part D or Medicare Advantage drug plan; it isn't automatic.
• It works best for people with high drug costs early in the year. If your drugs are inexpensive, monthly billing may not help much.
• You can join at any time during the year, though joining before you fill a big prescription gets you the most benefit.

You can sign up by contacting your plan directly, and plans are required to offer it.

What this means for San Tan Valley residents

San Tan Valley sits in Pinal County, where Medicare beneficiaries choose from a range of stand-alone Part D plans and Medicare Advantage plans with drug coverage. The county-level plan menu changes every year, and 2027 is no exception — carriers continue to adjust formularies, pharmacy networks, and cost-sharing under the redesigned Part D structure. The 2027 lineup is detailed in each plan's Annual Notice of Change and on Medicare.gov's Plan Finder.

That's why comparing plans this fall matters more than usual, even if you've been on the same plan for years. The plan that was a good fit in 2025 or 2026 may look different in 2027 once the current rules settle in.

You can compare Pinal County plans using the Plan Finder at medicare.gov, or get free, unbiased help from Arizona's State Health Insurance Assistance Program (SHIP), known locally as SHIP Arizona.

Dates to circle

• Oct. 15 – Dec. 7, 2026: Medicare Annual Enrollment Period. Any Part D or Medicare Advantage change you make now takes effect Jan. 1, 2027.
• Jan. 1 – March 31, 2027: Medicare Advantage Open Enrollment. 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.

One more figure worth knowing: IRMAA, the income-related surcharge that raises Part B and Part D premiums for higher earners, kicks in above $109,000 in income for a single filer in 2026 (higher for joint filers). It's based on your tax return from two years earlier.

Common questions

Does the $2,400 cap include my monthly premium? No. The cap only counts what you pay for covered drugs — deductibles, copays, and coinsurance. Premiums are separate.

If I use the Prescription Payment Plan, do I still hit the $2,400 cap? Yes. Your out-of-pocket total is still tracked the same way. The payment plan just changes when you pay, not how much.

What happens if I don't sign up for the payment plan and get hit with a big bill in January? You can still opt in mid-year. Your plan has to enroll you within a set timeframe, and any drug costs from that point forward can be smoothed. Costs you already paid at the counter can't be moved into the plan retroactively.

Do I need to do anything to get the $2,400 cap? No. It applies automatically to everyone with Medicare Part D coverage in 2027. You don't have to sign up or call anyone.

Where to get help you can trust

• Medicare.gov — the official source for plan comparisons, program rules, and the 2027 changes.
• 1-800-MEDICARE (1-800-633-4227) — 24/7, free.
• SHIP Arizona — free, one-on-one Medicare counseling from trained volunteers who don't sell insurance.

The 2027 Part D rules continue real progress for anyone who takes expensive medications, but they only help if your plan actually covers your drugs. Take a few minutes this fall to check — your future self will thank you.