In April 2024, the Department of Health and Human Services (HHS) finalized revised regulations implementing Section 1557 of the Patient Protection and Affordable Care Act (ACA). The new, final Section 1557 regulations (2024 Rule) have staggered effective dates—beginning as early as November 2, 2024—and the 2024 Rule now applies to recipients of Medicare Part B payments. In this article, we discuss some notable changes in the 2024 Rule and provide a chart summarizing key requirements and compliance deadlines.