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–114b
Drug makers must pay rebates when the price of a Part D drug goes up faster than inflation. The Secretary of Health must tell each manufacturer, no later than 9 months after each 12‑month “applicable period,” how much the price rose above inflation for each dosage and strength and what rebate is due. After getting that notice, the manufacturer has 30 days to pay the rebate. The Secretary can delay reporting for the periods that start October 1, 2022, and October 1, 2023, until December 31, 2025. The rebate is the number of units dispensed multiplied by the amount the annual manufacturer price exceeds an inflation‑adjusted payment amount. Starting with plan year 2026, units that received discounts under section 256b are left out. The Secretary can reduce or waive rebates for drugs in shortage, for severe supply disruptions, or to avoid future shortages of generics. The annual and benchmark prices use the manufacturer’s average price each quarter weighted by units dispensed. The inflation‑adjusted payment amount starts with the benchmark price and grows by the change in the CPI‑U between the benchmark and the applicable period. The Secretary will correct rebates if plan sponsors report revised unit counts, and manufacturers must repay any underpayment within 30 days. All rebates go into the Medicare Prescription Drug Account. If a manufacturer fails to pay, it faces a civil penalty of 125% of the unpaid rebate. Decisions about unit counts, whether a drug is rebatable, and the rebate math cannot be appealed. Key terms (one line each): Part D rebatable drug — a covered Part D drug that meets the law’s approval and market rules, but not one whose average annual cost per user is under $100 (that $100 is increased by CPI as described); Unit — the smallest dispensable amount (like a tablet or milligram); Payment amount benchmark period — January 1, 2021, through the month before October 1, 2021; Benchmark period CPI‑U — CPI‑U for January 2021; Applicable period CPI‑U — CPI‑U for the first month of the applicable period; Average manufacturer price — as defined under section 1396r–8(k)(1); Applicable period — a 12‑month period starting October 1 of each year beginning October 1, 2022. The Secretary will implement rules for 2022, 2023, and 2024 by guidance.
Full Legal Text
The Public Health and Welfare, Source: USLM XML via OLRC
Reference
Citation
42 U.S.C. § 1395w–114b
Title 42, The Public Health and Welfare
Last Updated
Sep 23, 2026
Release point: 119-110