ERISA preemption and its impact on behavioral health services.

Recently, mental health parity provisions were passed and incorporated retroactively into the Health Insurance Portability and Accountability Act (PL 104-191). Although limited, these provisions were instrumental in focusing national attention and debate on people's need for and right to behavioral health services. A handful of states have also passed parity provisions, but their full impact on the insurance market cannot be assessed. This is because a majority of plans are preempted from compliance with many state insurance mandates by the Employee Retirement Income Security Act of 1974 (ERISA). ERISA is the primary obstacle to state behavioral health mandates, and it threatens the inclusion of behavioral health providers and settings in managed care plans integrating public and private healthcare systems. This article provides basic information on ERISA, its preemption clauses, and its impact on behavioral healthcare services.