1. For Medicare, see Medicare administrative contractor (MAC) . 2. For TRICARE and CHAMPVA, the insurance company that handles the claims for care received within a region of the United States and services specific states. Also see TRICARE regions .

State in a managed care organization that has enough operating funds on hand, or in reserve, to cover all expenses associated with services for which it has taken on a financial risk.

1. Any continuous 12-month period used by insurance companies and the government as an accounting period. 2. In the Medicare and TRICARE programs, the federal government’s fiscal year is from October 1 to September 30.