Managed care dominates health care in the United States. It is any health care delivery system that combines the functions of health insurance and the actual delivery of care, where costs and utilization of services are controlled by methods such as gatekeeping, case management, and utilization review. Different types of managed care plans came into development by three major factors. These factors include choice of providers, different ways of arranging the delivery of services, and payment and risk sharing. Types of managed care organizations include Health Maintenance Organizations (HMOs) which consist of five common models that differ according to how the HMO is related to the participating physicians, Preferred Provider Organizations (PPOs), Exclusive Provider Organizations (EPO), and Point of Service Plans (POS). `The information management system in a managed care organization is determined by the structure of the organization' (Peden,1998, p.90). The goal of a managed care system...