Paul Wellstone Mental Health and Addiction Equity Act of 2007 - Amends the Employee Retirement Income Security Act of 1974 (ERISA), the Public Health Service Act, and the Internal Revenue Code to prohibit treatment limits or the imposition of financial requirements on mental health and substance-related disorder benefits in group health plans which are not similarly imposed on substantially all medical and surgical benefits in any category of items or services under such plans.
Directs the Comptroller General to study the effect of the implementation of this Act on various aspects of the health care system, including the cost of and access to health insurance coverage, the quality of health care, Medicare, Medicaid, and state and local mental health and substance abuse treatment spending, and spending on public services.