Dr. Winston Chan is a double board-certified General Surgeon and Colon and Rectal Surgeon with additional certification and training in the use of the Da Vinci Xi robotic system for minimally invasive surgeries. He is an accomplished surgeon with extensive experience in both university-based teaching and clinical robotics proctoring.Dr. Chan earned his medical degree from the University of Cincinnati College of Medicine. He completed his general surgery residency at The University of Texas Health Science Center at Houston and his colon and rectal surgery fellowship at Baylor University Medical Center in Dallas. Dr. Chan's passion lies in using the latest advanced medical technology, such as robotics and laparoscopy, in combination with his own surgical dexterity to treat complex diseases through small incisions to promote patient comfort and outcomes. His surgical expertise includes treatment of gallbladder disease, hernias, colorectal cancer, diverticulitis and inflammatory bowel disease, anorectal disease, reflux disorders, and soft tissue conditions. Outside of work, he enjoys snowboarding, scuba diving, traveling and spending time with family.Dr. Chan is a member of the American College of Surgeons, American Society of Colon and Rectal Surgeons, and Tarrant County Medical Society. He speaks English and Mandarin. Dr. Chan is rated as an Experienced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Ogilvie Syndrome, Retroperitoneal Inflammation, Gallbladder Disease, Bladder Reconstruction, and Endoscopy.

"Dr. Aamer Agha has been performing colonoscopy, upper endoscopy and capsule endoscopy procedures since 2005. He is board certified in Gastroenterology and Internal Medicine. After graduating summa cum laude from the University of Texas in Austin, his residency was done at Baylor College of Medicine in Houston, Texas. Dr. Agha completed his Fellowship in Gastroenterology, also at Baylor College of Medicine. He has also published several papers in medical literature pertaining to Gastroenterology.Dr. Agha is a member of the American Gastroenterology Association</a>, Society for Gastrointestinal Endoscopy</a> and the American College of Gastroenterology</a>.". Dr. Agha is rated as an Experienced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Familial Adenomatous Polyposis, Gastroesophageal Reflux Disease (GERD), Hiatal Hernia, Endoscopy, and Gastrectomy.

Dr. Adnan Nadir has been a board-certified gastroenterologist and internist in North Texas since 2000. He is also fellowship-trained in gastroenterology. Dr. Nadir places a priority on providing quality comprehensive care for common and complex digestive, esophageal and urologic disorders, including pancreatic disease and colon/rectal disorders.Dr. Nadir earned his medical degree from Dow Medical College in Pakistan. He completed his internal medicine residency at Wayne State University in Detroit, Mich., becoming chief resident during his final year of residency. He then decided to pursue a fellowship in gastroenterology at William Beaumont Hospital in Royal Oak, Mich. More recently, Dr. Nadir completed the Physician Leadership Development Program through the Southern Methodist University Cox School of Business in Dallas, Texas. He has been a member of, and has served in leadership roles for, multiple organizations and committees over the years, including the American College of Gastroenterology and American Gastroenterological Association.Outside of work, Dr. Nadir enjoys traveling and spending time with family and friends. He is fluent in the Hindi and Urdu languages. Dr. Nadir is rated as an Experienced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Gastroesophageal Reflux Disease (GERD), Familial Adenomatous Polyposis, Childhood Volvulus, Percutaneous Coronary Intervention (PCI), and Transcatheter Aortic Valve Replacement (TAVR).

Natalia Gutierrez is a primary care provider, practicing in Family Medicine in Carrollton, Texas. Dr. Gutierrez is rated as an Experienced provider by MediFind in the treatment of Proctitis. Her top areas of expertise are Idiopathic Neutropenia, Type 2 Diabetes (T2D), Familial Hypertension, and Hypertension.

Luke Ouyang is a primary care provider, practicing in Internal Medicine in Allen, Texas. Dr. Ouyang is rated as an Experienced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Infant Hyperglycemia, Cirrhosis, Familial Combined Hyperlipidemia, and Xanthoma.

Timothy Swofford is a primary care provider, practicing in Family Medicine in Royse City, Texas. Dr. Swofford is rated as an Experienced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Glucocorticoid-Remediable Aldosteronism, Hypertension, Familial Hypertension, and Obesity.

Maurice Haddad, MD, is dedicated to delivering high-quality, compassionate care to Pasadena and nearby communities. Maurice Haddad specializes in Gastroenterology and works at Maurice Haddad, MD. To make an appointment, please call (281) 998-2488. To review all accepted insurance carriers, please visit: https://www.stlukeshealth.org/patients-visitors/patients/billing-insurance/insurances-accepted. Dr. Haddad is rated as a Distinguished provider by MediFind in the treatment of Proctitis. His top areas of expertise are Gastritis, Chronic Erosive Gastritis, Esophagitis, Gastrectomy, and Colonoscopy.

James Prieto is a Colorectal Surgeon in Live Oak, Texas. Dr. Prieto is rated as a Distinguished provider by MediFind in the treatment of Proctitis. His top areas of expertise are Familial Colorectal Cancer, Proctitis, Colorectal Cancer, Hemorrhoidectomy, and Colostomy.

Bidhan Das is a Colorectal Surgeon in Houston, Texas. Dr. Das is rated as a Distinguished provider by MediFind in the treatment of Proctitis. His top areas of expertise are Colorectal Cancer, Familial Colorectal Cancer, Proctitis, Hemorrhoidectomy, and Hernia Surgery.

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 an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Gastrointestinal Bleeding, Gastroesophageal Reflux Disease (GERD), Proctitis, Endoscopy, and Colonoscopy.

Abrar Ahmed is an Internal Medicine specialist and a Gastroenterologist in Dallas, Texas. Dr. Ahmed is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Heartburn, Colitis, Gas Bloat Syndrome, Gastrectomy, and Endoscopy.

Dr. Zihao Wu is a board-certified colon and rectal surgeon with additional board certification in general surgery. Dr. Wu previously served for more than a decade as an associate professor in Clinical Surgery within the Department of Surgery at the University of Missouri School of Medicine in Columbia. He specializes in treating anorectal disorders (hemorrhoids, anal fistula, anal fissure, anal warts etc), colon and rectal cancer, complicated diverticular disease, Crohn’s disease, Ulcerative colitis, and rectal prolapse. He also offers screening and diagnostic colonoscopy. He performs advanced robotic and laparoscopic colon and rectal surgeries. Dr. Wu grew up in a small village in Southern China where his father was the only physician. His passion for caring for others came from watching his father at work. He earned his medical degree at Sun Yat-Sen University of Medical Sciences in China. He completed his general surgery residency at St. Agnes Healthcare in Baltimore, Md., before going on to complete his colon and rectal surgery fellowship at Saint Vincent Health Center in Erie, Pa. Dr. Wu is a member of the American College of Surgeons and American Society of Colon and Rectal Surgeons. He is fluent in the Chinese Cantonese language. Dr. Wu is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Familial Colorectal Cancer, Colorectal Cancer, Lynch Syndrome, Hernia Surgery, and Ileostomy.

Kimberly Persley is a Gastroenterologist in Dallas, Texas. Dr. Persley is rated as an Advanced provider by MediFind in the treatment of Proctitis. Her top areas of expertise are Ulcerative Colitis, Crohn's Disease, Colonic Malakoplakia, Endoscopy, and Gastrectomy.

Kevin Green is a Gastroenterologist in Tyler, Texas. Dr. Green is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Turcot Syndrome, Gardner Syndrome, Familial Adenomatous Polyposis, Endoscopy, and Colonoscopy.

Tsauyu Lin is a Gastroenterologist in Tyler, Texas. Dr. Lin is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Turcot Syndrome, Gardner Syndrome, Familial Adenomatous Polyposis, Lower Esophageal Ring, and Endoscopy.

Adnan Badr is an Internal Medicine specialist and a Gastroenterologist in Plano, Texas. Dr. Badr is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Familial Adenomatous Polyposis, Barrett Esophagus, Eosinophilic Colitis, Gastrectomy, and Endoscopy.

James Hakert is an Internal Medicine specialist and a Gastroenterologist in Dallas, Texas. Dr. Hakert is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Gastroesophageal Reflux Disease (GERD), Gas Bloat Syndrome, Portal Hypertension, Gastrectomy, and Endoscopy.

Stephen Hutto is a Gastroenterologist in Tyler, Texas. Dr. Hutto is rated as an Advanced provider by MediFind in the treatment of Proctitis. His top areas of expertise are Swallowing Difficulty, Painful Swallowing, Turcot Syndrome, Gardner Syndrome, and Endoscopy.

Kai Xia is a Gastroenterologist in Tyler, Texas. Dr. Xia is rated as an Advanced provider by MediFind in the treatment of Proctitis. Her top areas of expertise are Familial Adenomatous Polyposis, Lower Esophageal Ring, Benign Esophageal Stricture, Gastrectomy, and Colonoscopy.

Angelica Belo is a Gastroenterologist in Marshall, Texas. Dr. Belo is rated as an Advanced provider by MediFind in the treatment of Proctitis. Her top areas of expertise are Gastroesophageal Reflux Disease (GERD), Painful Swallowing, Swallowing Difficulty, Endoscopy, and Gastrostomy.