Cardiac rehabilitation is defined as “Program is designed to limit the physiologic and psychological effect of cardiac illness and also teaches the importance of life style changes to prevent recurrence of cardiac events.” Cardiac rehabilitation is a comprehensive treatment given in patients with cardiac disease providing elements of health education, counseling for cardiovascular risk mitigation,Physical exercise, and stress-management. There is increasing evidence that cardiac rehabilitation decreases mortality, morbidity and unplanned hospital admission, as well as improvements in exercise ability, quality of life and psychological wellbeing. Cardiac rehabilitation (CR) in patients with coronary artery disease is an important, albeit underutilized, therapy. The goal of this study was to determine the relation between CR completion and resource utilization and mortality. Discussion of this analysis focuses on what constitutes cardiac rehabilitation, as well as examples its effects on cardiovascular mortality, morbidity and quality of life.