Self-Insurance Protection Act - Amends the Public Health Service Act, the Employee Retirement Income Security Act of 1974 (ERISA), and the Internal Revenue Code to exclude from the definition of "health insurance coverage" a stop loss policy obtained by a self-insured health plan or a plan sponsor of a group health plan that self-insures the health risks of its plan participants to reimburse the plan or sponsor for losses incurred in providing health or medical benefits to such plan participants in excess of a predetermined level set forth in the stop loss policy.