WILLIAM A. RIZK, M.D., F.A.C.S. 
Dr. Bill Rizk is a graduate of the University of Iowa with a Bachelor of Science in exercise physiology. He graduated from the University of So. Dakota Medical School and the Iowa Methodist Medical Center Surgery Residency, and completed additional training in advanced laparoscopic. Dr. Rizk is a Diplomat of the American Board of Surgery and a Fellow of the American College of Surgeons. He is also a member of the Woodbury County Medial Society, the Throckmorton Surgical Society, the Society of American Gastrointestinal Endoscopic Surgeons and the American Society of Bariatric Surgeons (ASBS). He has practiced in Sioux City since 1999.

Keith A. Vollstedt, M.D., F.A.C.S,
Dr. Keith Vollstedt is a graduate of Morningside College, with a Bachelor of Science Degree. He graduated from the University of Iowa College of Medicine and the University of Iowa Hospitals and Clinics General Surgery Residency. He is a Diplomat of the American Board of Surgery and is a Fellow of the American College of Surgeons. He is also a member of the American Society of Bariatric Surgeons (ASBS). Dr. Vollstedt has practiced in Sioux City since 1999.

Michael L. Wolpert M.D., F.A.C.S.
Dr. Mike Wolpert is a graduate of Creighton University with a Bachelor of Science in biology. He graduated from Creighton University School of Medicine and the Creighton University Affiliated Hospitals General Surgery Residency. He is a Diplomat of the American Board of Surgery and is a Fellow of the American College ofSurgeons. Dr. Wolpert is the Director of Trauma at Mercy Medical Center and is also a member of the American Society of Bariatric Surgeons (ASBS). He has practiced in Sioux City since 1980.