The Mental Health Parity and Addiction Equity Act (MHPAEA) requires insurers to cover mental health and substance use disorders at the same level as physical health conditions. If your behavioral health claim was denied, parity law may be your strongest argument.
What Does Mental Health Parity Require?
The MHPAEA requires that:
- Financial requirements (copays, deductibles, out-of-pocket limits) for mental health must be no more restrictive than for medical/surgical benefits
- Treatment limitations (visit limits, prior authorization requirements) must be comparable
- Non-quantitative treatment limitations (medical necessity criteria, network adequacy) must be applied no more stringently
Common Parity Violations
Visit Limits
If your plan limits therapy to 20 visits per year but doesn't limit physical therapy visits, that's a parity violation.
Stricter Prior Authorization
If your plan requires prior authorization for mental health visits but not for comparable medical visits, that's a parity violation.
Different Medical Necessity Criteria
If the insurer applies stricter medical necessity criteria for mental health than for medical/surgical conditions, that's a parity violation.
Network Adequacy
If the plan has significantly fewer in-network mental health providers than medical providers relative to demand, that may be a parity violation.
How to Appeal Using Parity
- Request the plan's parity compliance analysis — insurers must make this available upon request (2025 MHPAEA final rule)
- Compare limitations — compare the mental health limitation to the comparable medical/surgical limitation
- Cite the specific parity requirement — reference MHPAEA and the 2024 final rule
- File with the state — contact your state insurance commissioner to report suspected parity violations
- File with DOL — for ERISA plans, file a complaint with the U.S. Department of Labor
2024 Final Rule Updates
The 2024 final MHPAEA rule strengthened parity requirements:
- Insurers must now provide comparative analyses of NQTLs on request
- Plans must take corrective action if they find parity violations
- Stronger enforcement mechanisms