Title 42 › Chapter 7— SOCIAL SECURITY › Subchapter XVIII— HEALTH INSURANCE FOR AGED AND DISABLED › Part D— Voluntary Prescription Drug Benefit Program › Subpart 2— prescription drug plans; pdp sponsors; financing › § 1395w–115
Pays monthly help to sponsors of stand-alone drug plans and to Medicare Advantage plans with drug coverage so premiums stay lower, fewer people pick plans only when they need drugs, and more plans join. The help has two parts. One part is a direct monthly payment for each enrolled person. It equals the plan’s bid amount (after an adjustment) minus the base beneficiary premium. The other part is a reinsurance payment that helps cover very high drug costs after a person hits the annual out‑of‑pocket limit. Before 2025 reinsurance equals 80 percent of those covered costs above the out‑of‑pocket limit. For 2025 and later, it is 20 percent for certain “applicable” drugs and 40 percent for other covered drugs. The law keeps an overall subsidy level at 74.5 percent (or the percent set for 2024–2029, and for 2030+ equal to 100 percent minus the percent set for that year). Some key terms: “allowable reinsurance costs” — the part of drug costs the plan or enrollee actually pays (after discounts and rebates) up to what basic coverage would pay; “gross covered prescription drug costs” — all drug costs for the enrollee paid by anyone, excluding plan admin costs; “coverage year” — the calendar year when drugs are dispensed; “adjusted allowable risk corridor costs” — plan costs used to measure whether a plan’s actual costs are much higher or lower than expected. The Secretary must adjust bids for enrollee risk and regional price differences, collect linked drug‑claim data from plans, and publish the risk adjusters. Each year the Secretary sets a risk corridor around the target amount (based on the standardized bid minus assumed admin costs). If a plan’s adjusted costs fall outside that corridor, payments to or from the plan are increased or reduced by specified percentages (normally 50 percent; for 2006–2007 higher sharing of 75% or 90% may apply under certain conditions). Plans that offer extra (supplemental) drug benefits bear full financial risk for those extras. Payments come from the Medicare Prescription Drug Account, may be made interim, require plan data and permit audits, and some disclosed information is restricted. For plan year 2023, plans also get an extra subsidy equal to the total reduction in enrollees’ cost‑sharing and deductibles, payable within 18 months after the plan year ends.
Full Legal Text
The Public Health and Welfare, Source: USLM XML via OLRC
Legislative History
Reference
Citation
42 U.S.C. § 1395w–115
Title 42, The Public Health and Welfare
Last Updated
Apr 5, 2026
Release point: 119-73not60