Surg Obes Relat Dis 8 (3): 357 - 363, 2012. doi: 10.1016 / j. soard.2012.01.016 Prognosis for Bariatric Surgery In hospitals accredited by the American Society of Bariatric Surgery as centers of excellence (COE), overall 30-day mortality is 0.2 to 0.3%.