 Despite the well-documented benefits of bariatric surgery in terms of health and healthcare costs, many insurers deny coverage for the surgery out of fear that the cost of surgery will financially burden the system. These insurers, however, fail to consider the improvement in obesity-related diseases and associated cost savings. The recent change in policy by the Florida Hospital Healthcare System FHHS that allows for partial coverage of bariatric surgery provides the unique opportunity to study prospectively the cost effectiveness of the surgery, i.e. cost of surgery vs. cost savings. Study participants will include approximately 75 to 100 FHHS covered individuals 18 to 64 years who have been approved for bariatric surgery and who have provided their written consent for study participation. 