Lower Drug Costs for Families Act

This bill amends Medicare's prescription drug rebate calculations for Part B and Part D drugs. It changes the base year for calculating rebates from 2021 to 2016 and adjusts how "commercial market" drug units are counted to exclude units paid for under state Medicaid programs. These changes affect drug manufacturers who pay rebates to Medicare, as they alter the formula used to determine rebate amounts. The bill does not create new cost-saving measures but modifies existing calculation methods for Medicare's drug rebate program.