Federal law requires that your health insurance cover mental health and substance use treatment at parity with medical and surgical benefits. If your insurer is treating your therapy differently than a physical health visit, you likely have legal grounds to push back.
What the Parity Law Requires
The Mental Health Parity and Addiction Equity Act (MHPAEA), originally passed in 2008 and significantly strengthened in 2024, prohibits group health plans and insurers from imposing more restrictive coverage rules on mental health and substance use disorder (MH/SUD) benefits than they apply to comparable medical or surgical benefits.
Quantitative Limits: Now Largely Banned
Payers may no longer apply stricter numerical limits to mental health care than to medical care:
- Annual visit limits (e.g., "only 20 therapy sessions per year") are prohibited if the plan does not apply equivalent visit caps to medical office visits
- Day limits for inpatient psychiatric care must match surgical inpatient limits
- Dollar limits must be equal across MH/SUD and medical/surgical benefits
Non-Quantitative Treatment Limits (NQTLs)
NQTLs are the harder-to-spot restrictions — policies and processes rather than numbers:
- Prior authorization — If medical surgeries do not require preauth, therapy sessions cannot require it either
- Network adequacy — The payer must maintain an adequate network of MH/SUD providers comparable to its medical network
- Step therapy — Requiring you to try lower-cost treatments first must be equally applied to medical conditions
- Geographic limitations — Narrower provider geography for mental health than for medical care violates parity
How to Assert Your Parity Rights
- Request a parity analysis — Under the 2024 MHPAEA rules, plans must provide documentation of their parity analysis upon request. Ask your insurer in writing.
- File an internal appeal — When a claim is denied, exercise your right to an internal appeal. Reference the MHPAEA explicitly in your appeal letter.
- File an external appeal — After exhausting internal options, you can request an independent external review under the ACA.
- File a complaint — Contact your state insurance department. Most states have dedicated mental health parity complaint processes. For self-insured employer plans, file with the U.S. Department of Labor.
The No Surprises Act (2022)
While separate from MHPAEA, the No Surprises Act protects you from unexpected out-of-network charges in emergency situations. It also requires insurers to provide good-faith cost estimates upon request — useful when evaluating the true cost of OON therapy.
Parity and Out-of-Network Superbills
Even with OON therapy, parity applies to your plan's out-of-network benefit. If your plan reimburses 80% of UCR for an OON orthopedist, it must do the same for an OON therapist. A properly completed superbill ensures your claim is processed accurately.