On Sept. 9, 2024, the Departments of Labor, Health and Human Services, and the Treasury (Departments) released a final rule to strengthen the requirements of the Mental Health Parity and Addiction Equity Act (MHPAEA). The final rule focuses on nonquantitative treatment limitations (NQTLs) that health plans and health insurance issuers place on mental health and substance use disorder (MH/SUD) benefits.