Dr. Klaus Bielefeldt

Sultan Mahmood, MD, specializes in gastroenterology and is board certified in gastroenterology and internal medicine by the American Board of Internal Medicine. He is affiliated with UPMC Passavant, UPMC St. Margaret, UPMC Mercy, UPMC Presbyterian, and UPMC Shadyside. Dr. Mahmood completed his fellowships at Beth Israel Deaconess Medical Center - Harvard University and Oklahoma University College of Medicine, residency at Oklahoma University College of Medicine, and medical degree at King Edward Medical University. Dr. Mahmood’s clinical interests include third space endoscopy (including POEM, G-POEM, and ESD), Endoscopic Ultrasound, ERCP, large polyp EMR, and Endoscopic stricture management. His research interests include medical education and third-space endoscopy. He has multiple publications focusing on improving quality metrics for endoscopy and colonoscopy, medical education, and third-space endoscopy. Dr. Mahmood is the Director of Third Space Endoscopy and Advanced Tissue Resection. He is married and has 3 children. Outside of work, he enjoys playing tennis, pickleball, and hiking. Dr. Mahmood is rated as an Advanced provider by MediFind in Gallbladder Removal. His top areas of expertise are Jaundice, Choledocholithiasis, Gastrointestinal Bleeding, Endoscopy, and Colonoscopy.

Adam Slivka, MD, PhD, is a Professor at the University of Pittsburgh School of Medicine and the Associate Chief of Clinical Affairs for the Division of Gastroenterology, Hepatology, and Nutrition at the University of Pittsburgh School of Medicine. Dr. Slivka is rated as an Elite provider by MediFind in Gallbladder Removal. His top areas of expertise are Chronic Pancreatitis, Hereditary Pancreatitis, Acute Pancreatitis, Endoscopy, and Pancreaticoduodenectomy.

John Nasr is a Gastroenterologist in Morgantown, West Virginia. Dr. Nasr is rated as a Distinguished provider by MediFind in Gallbladder Removal. His top areas of expertise are Choledocholithiasis, Acute Pancreatitis, Hereditary Pancreatitis, Endoscopy, and Gastric Bypass. Dr. Nasr is currently accepting new patients.