Medicare Part D in 2027 — $700 Standard Deductible and a $2,400 Out-of-Pocket Cap

The Centers for Medicare & Medicaid Services finalized the Part D benefit parameters for calendar year 2027 in April 2026, in the Announcement of Calendar Year 2027 Medicare Advantage Capitation Rates and Part C and Part D Payment Policies released on April 6, 2026. Two figures drive most beneficiary questions. The standard deductible increases to $700, an $85 rise from the $615 that applied in 2026. The annual out-of-pocket threshold increases to $2,400, up $300 from $2,100. Both take effect with coverage beginning Jan. 1, 2027, and neither is a projection or a proposal at this point; the amounts were settled months before the enrollment season in which beneficiaries act on them.^[2][3][4][5]

The relationship between the two numbers is the single most misread part of the design, and it works in beneficiaries' favor. The deductible is not an extra charge stacked on top of the cap. Spending applied to the $700 deductible counts toward the $2,400 ceiling, so the cap represents the total exposure for covered Part D drugs in the year rather than a figure reached only after the deductible is separately exhausted. Under the standard structure, a beneficiary pays 100 percent of covered drug costs subject to the deductible until $700 has been met, then moves into an initial coverage phase where the plan shares costs, and finally reaches the threshold, after which cost sharing on covered drugs falls to $0 for the remainder of the calendar year. This capped structure is a product of the Inflation Reduction Act's redesign of the Part D benefit, which eliminated the older open-ended coinsurance arrangement in the catastrophic phase.^[2][3]

These parameters describe the defined standard benefit, which functions as a ceiling and a benchmark rather than a description of any particular plan. Individual Part D plans and Medicare Advantage plans with drug coverage may set a deductible below $700, and a meaningful number charge no deductible at all; some apply the deductible only to certain drug tiers. Premiums, formularies and cost-sharing tiers vary by plan, by carrier and by county. The consequence for a beneficiary comparing options during open enrollment is that the $700 figure should be read as the maximum standard deductible a plan is permitted to impose, not as the amount to expect. The $2,400 out-of-pocket cap, by contrast, is a protection that applies across plans, which makes it the more universally relevant of the two numbers.^[2][4]

Timing matters for anyone intending to act on these figures. Medicare's annual open enrollment runs from Oct. 15 through Dec. 7, 2026, and elections made during that window take effect Jan. 1, 2027. Plans are required to send an Annual Notice of Change ahead of that window describing changes to premiums, cost sharing, formulary and networks for the coming year, which is the document that shows how a specific plan will apply the 2027 standard parameters. Reporting has noted that covered insulin products and recommended adult vaccines receive different treatment from ordinary brand-name prescriptions with respect to the deductible. Beyond the beneficiary-facing amounts, the same CY 2027 Rate Announcement finalized a net average year-over-year increase of 2.48 percent in Medicare Advantage plan payments, a substantial upward revision from the roughly flat 0.09 percent adjustment CMS had proposed in January 2026.^[2][3][5]