The Mental Health Parity and Addiction Equity Act of 2008 (MHPAEA) requires insurance plans to provide mental health and substance use disorder benefits no more restrictively than comparable medical-surgical benefits. The 2021 Consolidated Appropriations Act added documentation requirements; the 2024 MHPAEA Final Rule substantially strengthened the framework. The DOL EBSA portal at dol.gov/mental-health-parity tracks current regulatory status.
As of May 2025, federal enforcement of the 2024 Final Rule is paused pending the ERISA Industry Committee lawsuit. However, base MHPAEA statute and CAA 2021 obligations continue with full enforcement. Major carrier settlements (Cigna $13.6M in 2023, UnitedHealth $15.6M in 2024) continue to drive behavior change.
The practical implication: parity claims remain viable when an insurer denies SUD at higher rates than medical-surgical, even in the current enforcement-paused environment. Internal appeal reverses approximately 30–40% of denials with strong documentation. External review by federally-certified Independent Review Organization (IRO) reverses behavioral health denials at 30–40% per DOL EBSA data. Parity complaints to DOL EBSA or state insurance commissioner address systematic denial patterns.