The document summarizes the Medicare Access and CHIP Reauthorization Act (MACRA) which repeals the Sustainable Growth Rate formula and shifts Medicare payments to value-based and alternative payment models. MACRA establishes two payment tracks - the Merit-based Incentive Payment System (MIPS) and Alternative Payment Models (APMs). MIPS consolidates existing quality programs and provides payment incentives or penalties based on a performance score. APMs offer additional rewards for physicians meeting thresholds for payments or patients in eligible models.