On September 9, 2024, the U.S. Departments of Health and Human Services (HHS), Labor, and the Treasury (collectively, the Departments) released new final rules implementing MHPAEA. The final rules amend certain provisions of the existing MHPAEA regulations and add new regulations to set forth content requirements and timeframes for responding to requests for nonquantitative treatment limitation (NQTL) comparative analyses required under MHPAEA, as amended by the Consolidated Appropriations Act, 2021 (CAA, 2021). The final rules reflect and address the thousands of comments received from the public during the comment period on the proposed rules that were published on August 3, 2023. The Departments appreciate the feedback and insight received through this process on this critically important issue.