Medicare 2026

How Medicare Part D Covers Brand-Name Drugs in 2027: Tiers, Exceptions and the $2,400 Cap

If you take a brand-name medication, Medicare Part D in 2027 will look familiar in some ways and noticeably friendlier in others. The out-of-pocket cap is lower than it was in 2026, more brand-name drugs now have Medicare-negotiated prices, and the tools for pushing back when a plan won't cover a drug — or charges too much for it — are the same ones you've always had. Here's a plain-English look at how the pieces fit together.

The 2027 cap: a hard ceiling on what you pay

For 2027, the Part D out-of-pocket cap is $2,400. That means once what you've personally spent on covered Part D drugs during the year adds up to $2,400, you pay $0 for any additional covered Part D drugs through the end of that calendar year. (For reference, the cap is $2,100 in 2026.) The cap applies no matter which Part D plan you're enrolled in — a stand-alone drug plan paired with Original Medicare, or a Medicare Advantage plan that includes drug coverage.

Two other national Part D numbers to know for 2027: the most any plan may charge as an annual deductible is $700, and the base beneficiary premium (used to calculate the late-enrollment penalty) is $41.33. The premium a particular plan charges, along with its tier copays and coinsurance, is set plan by plan and varies — so always check the specifics before you enroll.

How formularies and tiers work for brand-name drugs

Every Part D plan publishes a formulary, which is simply the list of drugs it covers, organized into tiers. Lower tiers generally cost less; higher tiers generally cost more. Brand-name drugs typically sit on higher tiers than their generic counterparts, and some sit on a specialty tier reserved for the most expensive medications.

Part D plans must include at least two drugs in each therapeutic category or class — and they must cover all or substantially all drugs in six "protected classes": anticonvulsants, antidepressants, antineoplastics (cancer drugs), antipsychotics, antiretrovirals (HIV drugs), and immunosuppressants (used after transplants). If your brand-name medication falls into one of those protected classes, your plan is required to cover it.

Plans are also allowed to use utilization management tools on certain drugs: prior authorization (your doctor has to justify the prescription before the plan pays), step therapy (you try a lower-cost option first), or quantity limits (how much you can get in a given period).

Negotiated prices on 25 brand-name drugs

Medicare has negotiated prices for 10 brand-name Part D drugs that took effect January 1, 2026 — among them Eliquis, Jardiance and Xarelto. Starting January 1, 2027, negotiated prices apply to 15 more drugs, including Ozempic, Trelegy Ellipta and Xtandi. By law, every stand-alone Part D plan and every Medicare Advantage plan with drug coverage must list these negotiated-price drugs on its formulary. The exact copay or coinsurance still depends on the plan's tier structure, but the underlying drug price is set.

When your plan says no: exceptions and appeals

If your brand-name drug isn't on the formulary, or your plan is charging you a non-preferred tier price, or you're being asked to try something else first — you have options.

• Formulary exception: Ask the plan to cover a drug that isn't on its list, or to waive a prior authorization, step therapy, or quantity limit requirement.
• Tiering exception: Ask the plan to charge you the cost-sharing of a lower, preferred tier for a non-preferred brand-name drug. Note: plans are allowed to decline tiering exceptions for drugs on their specialty tier.

Your prescriber's supporting statement — explaining why the preferred drug or alternative won't work medically — is often the key to winning one of these requests. If the plan denies you, there's a formal appeals process; Medicare.gov walks through each level.

Spreading costs out over the year

Even with the $2,400 cap, a big pharmacy bill in a single month can be hard on a budget. The Medicare Prescription Payment Plan lets you spread your out-of-pocket drug costs across the calendar year in monthly amounts billed by your plan. It does not reduce what you owe — it just changes the timing. You can opt in through your Part D plan.

Where Part D lives: two paths, both neutral

You can get Part D either as a stand-alone drug plan alongside Original Medicare (often paired with a Medigap policy for medical costs) or built into a Medicare Advantage plan. Each path has trade-offs — provider networks, referral rules, extra benefits, premiums, and the way medical and drug costs are handled all differ. Neither is universally "better." Compare the specifics for your situation.

Special rules if you have Medicaid or Extra Help

Since 2025, people with Medicaid or Extra Help have a monthly Special Enrollment Period to move to Original Medicare paired with a stand-alone Part D plan, or to switch stand-alone Part D plans. Full-benefit dual-eligible individuals can also join an integrated Dual Eligible Special Needs Plan (D-SNP) in any month.

Dates and where to get help

Annual Enrollment runs October 15 – December 7, 2026, with any changes taking effect January 1, 2027. The 2027 Part B standard premium and deductible, and the IRMAA income brackets, had not been announced as of this writing — CMS typically releases those in the fall. Social Security announced a 3.6 percent cost-of-living adjustment for benefits payable beginning January 2027.

For personalized plan comparisons, formulary look-ups and official rules, visit Medicare.gov or call 1-800-MEDICARE (1-800-633-4227), available 24/7.