Finohta's health technology assessment report on bariatric surgery included a cost-utility analysis on three main surgical interventions used in Finland. A cost-utility analysis from the health care provider's perspective with a ten year time horizon was conducted. The parameter values were based on a representative population survey, register data, literature and expert opinions. Based on the analysis, bariatric surgery is more effective and less costly than current prevailing forms of treatment for the morbidly obese in Finland. The results were robust and consistent with previously published studies: Bariatric surgery is cost-effective in treatment of morbid obesity.