Mental Health Parity in Tennessee

Parity rules apply when:

• Your plan covers mental health or substance use disorder services (most employer plans and all ACA marketplace plans must).
• Your insurer denies, limits, or restricts mental health treatment.
• Your insurer imposes requirements — prior authorization, step therapy, higher cost-sharing — more restrictively for mental health than for medical/surgical care.
• You cannot find in-network mental health providers (the "ghost network" problem — listed providers who are not really accepting patients).

What parity requires:

• Financial requirements. Copays, deductibles, and coinsurance for MH/SUD care cannot exceed what applies to medical/surgical care in the same classification (inpatient, outpatient, emergency, prescription drugs).
• Treatment limitations. Visit limits, prior auth, and other restrictions on MH/SUD care cannot be tighter than for comparable medical care.
• Non-quantitative treatment limitations (NQTLs). Prior auth, step therapy, network adequacy, medical necessity criteria — all have to be applied no more stringently to MH/SUD than to medical/surgical benefits. The 2024 rule made this comparative analysis more rigorous on paper.

Three myths:

• "My plan does not have to cover mental health." All ACA marketplace plans and most employer plans must cover mental health as an essential health benefit. Small employer plans that do offer MH coverage have to comply with parity.
• "Parity means unlimited therapy." No. Parity means the MH limits cannot be stricter than medical/surgical limits. If specialist visits are capped at 30 per year, therapy visits can be too.
• "Insurer denied it, so it must not be covered." Many denials are themselves parity violations. If your plan covers comparable medical care without prior authorization but requires it for mental health, that is facially unequal.