Mental health parity is the legal requirement that health insurance plans cover mental health and substance use disorder (SUD) services at the same level as physical health services. The Mental Health Parity and Addiction Equity Act (MHPAEA) prohibits insurers from applying more restrictive coverage limits to mental health care than they do to comparable medical or surgical care.
In practice, parity means:
All ACA Marketplace plans, Medicaid expansion plans, and most employer-sponsored plans must comply with mental health parity rules. Mental health and substance use disorder services are also one of the 10 Essential Health Benefits required on all ACA-compliant plans.
Yes — file a complaint with your state insurance department or the U.S. Department of Labor (for employer plans). You can also appeal the denial through your insurer’s internal process, citing the MHPAEA requirement that mental health benefits be covered comparably to medical benefits. Documenting the disparity between what’s covered for physical vs. mental health strengthens your case.
Parity applies to coverage levels, not cost in absolute terms. If your plan charges the same copay for therapy as for a primary care visit, it’s likely parity-compliant. But if mental health visits have a separate higher copay, tighter visit limits, or more onerous prior auth requirements than comparable physical health services, that may be a parity violation worth challenging.
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