Dr. Michael S. Valachovic

Dr. Sheikh A Saleem has worked in the field of gastroenterology since 2017. He is a fellowship-trained gastroenterologist with clinical focus in the areas of colon cancer screening and the management of gastroesophageal reflux disease, Barrett’s esophagus, Inflammatory bowel disease, various liver diseases, and acute and emergent GI conditions. He uses minimally invasive endoscopic procedures including esophagogastroduodenoscopy (EGD), colonoscopy, and other techniques for management of various GI conditions.Dr. Saleem earned his medical degree at Lahore Medical and Dental College in Pakistan. He completed his internal medicine residency at Bassett Medical Center in Cooperstown, N.Y. He remained in the northeast to complete his fellowship training in gastroenterology at SUNY Upstate Medical University in Syracuse, N.Y. Dr. Saleem previously spent five years with Gastroenterology & Hepatology of Central New York before relocating to North Texas in 2025. He is fluent in the Punjabi and Urdu languages. Dr. Saleem is rated as a Distinguished provider by MediFind in the treatment of Gastrointestinal Bleeding. His top areas of expertise are Gastrointestinal Bleeding, Gastroesophageal Reflux Disease (GERD), Proctitis, Endoscopy, and Colonoscopy.

Alexander Mantas is an Internal Medicine specialist and a Gastroenterologist in Dallas, Texas. Dr. Mantas has been practicing medicine for over 19 years and is rated as a Distinguished provider by MediFind in the treatment of Gastrointestinal Bleeding. His top areas of expertise are Gastrointestinal Bleeding, Heartburn, Proctitis, Gas Bloat Syndrome, and Gastrectomy.

Sanjay Nayyar is an Internal Medicine specialist and a Gastroenterologist in Allen, Texas. Dr. Nayyar is rated as a Distinguished provider by MediFind in the treatment of Gastrointestinal Bleeding. His top areas of expertise are Acute Pancreatitis, Hereditary Pancreatitis, Morning Sickness, Gastrectomy, and Endoscopy.