With the stroke of a pen, California's governor, Gray Davis, approved legislation in September that will soon bring insurance coverage to 25 million individuals suffering from severe mental illnesses. Part of a major overhaul of the state's health insurance laws, when the parity bill becomes effective in July 2000, it will require that insurance companies provide co-payments, deductibles and lifetime benefits equivalent to those for other illnesses, along with reimbursements for partial hospital stays and outpatient and inpatient services.