Federal law requires most insurance plans to cover substance use disorder treatment comparably to medical and surgical care — understanding this law gives you real leverage if you’re facing a denial or excessive barriers.
The core law: MHPAEA
The Mental Health Parity and Addiction Equity Act requires group health plans that offer substance use disorder benefits to apply financial requirements (copays, deductibles) and treatment limitations (prior authorization, visit limits, medical necessity criteria) that are no more restrictive than those applied to comparable medical/surgical benefits.
What this means concretely
- If your plan doesn’t require prior authorization for, say, a comparable medical procedure, it generally can’t impose a stricter prior authorization process for opioid use disorder treatment
- Visit limits or day limits on treatment must be comparable to limits applied to medical/surgical care, not arbitrarily stricter
- Medical necessity criteria used to deny SUD treatment must be applied on a comparable basis to medical/surgical necessity determinations
Who this applies to
Most employer group health plans and, under the ACA, individual and small-group marketplace plans (where SUD treatment is an Essential Health Benefit). Medicaid managed care and CHIP are also subject to parity requirements, though the specifics differ somewhat from commercial insurance.
What to do if you suspect a parity violation
- Request the specific criteria used for any denial, in writing
- Ask specifically whether comparable limitations apply to medical/surgical benefits under your plan
- File a complaint with your state insurance department or the U.S. Department of Labor (for employer plans) if you believe parity isn’t being honored
- Use our [insurance appeal builder tool], which drafts a letter citing these specific requirements
Medically reviewed by [pending]. Sources: MHPAEA (2008), ACA Essential Health Benefits requirements, U.S. Department of Labor parity enforcement guidance.