The 20 Best Gastric Bypass Doctors in District of Columbia, US
Find the Experts and Specialists who perform Gastric Bypass
Sibley Memorial Hospital
Margaret “Geri” Keane is a gastroenterologist specializing in Therapeutic and Bariatric endoscopy. She primarily treats people who require assistance with weight loss or who have weight regain or a complication following Bariatric Surgery. She offers the full range of minimally invasive endoscopic approaches to weight loss, including endoscopic sleeve gastroplasty, the gastric balloon procedure or transoral gastric outlet reduction. She also sees patients who have biliary complaints such as bile duct stones or strictures, cancers of the bile duct or and diseases of the pancreas such as pancreatic cysts, to name a few. She performs all forms of therapeutic EUS and ERCP including cholangioscopy. Dr. Keane earned her medical degree at Guy’s, King’s and St Thomas’ Medical school in London. She completed her internal medicine residency at The Hammersmith and Charing Cross hospitals in London, followed by a fellowship in gastroenterology and hepatology at University College London Hospitals, the Royal Free Hospital and King’s College Hospital in London. During her gastroenterology fellowship, Dr. Keane undertook a master’s degree in medical education and a Ph.D. at University College London. Her doctorate explored novel diagnostic and therapeutic strategies for the management of pancreatic cysts. Following her gastroenterology fellowship, Dr. Keane completed a fellowship in hepatology and endoscopic retrograde cholangiopancreatography/endoscopic ultrasound at King’s College London, followed by a two-year advanced endoscopy fellowship at Johns Hopkins. She is certified in general internal medicine, gastroenterology and hepatology by the Joint Royal Colleges of Physicians Training Board of the United Kingdom. She is a member of the Royal College of Physicians of the United Kingdom and is a fellow of the Higher Education Academy. She is a recipient of the American Society for Gastrointestinal Endoscopy 2022 Endoscopic Training Award, which enabled her to gain dedicated training in bariatric endoscopy at Mohak bariatric center in Indore, India, one of the busiest bariatric centers in the world. Dr. Keane’s research interests include Bariatric Endoscopy, Endoscopic innovation and early diagnostic strategies for pancreatic and biliary tract cancers including the management of pancreatic cysts. She has published more than 70 original articles, editorials, book chapters and review articles. Dr. Keane is rated as an Experienced provider by MediFind in Gastric Bypass. She is also highly rated in 4 other conditions, according to our data. Her clinical expertise encompasses Bile Duct Obstruction, Pancreatic Cancer, Cholestasis, Endoscopy, and Hepato-Pancreato-Biliary Surgery.
Sibley Memorial Hospital
Gastroenterologist Zadid Haq specializes in the diagnosis and management of common gastrointestinal conditions, including colorectal cancer, gastroesophageal reflux disease (GERD), inflammatory bowel disease, constipation, and diarrhea, with a clinical focus on evidence-based, patient-centered care. Dr. Haq earned a medical degree from Louisiana State University Health Sciences Center. He completed an internal medicine residency at The Johns Hopkins University School of Medicine and clinical fellowship training in gastroenterology and hepatology at The Johns Hopkins Hospital. Dr. Haq studies clinical outcomes related to diagnosis and treatment across a broad spectrum of gastrointestinal conditions. Dr. Haq is rated as an Experienced provider by MediFind in Gastric Bypass. His clinical expertise encompasses Colitis, Viral Gastroenteritis, Ulcerative Colitis, Hemorrhagic Proctocolitis, and Gastric Bypass. Dr. Haq is board certified in American Board Of Internal Medicine.
Sibley Memorial Hospital
Dr. Drew Jung is an assistant professor of surgery in the Johns Hopkins Department of Surgery. He is an expert in minimally invasive surgery whose clinical focus is in laparoscopic and robotic surgeries. He has specialties in open and laparoscopic hernias, bariatrics, foregut, and quality improvement as it pertains to quality of care. Dr. Jung is focused on being able to get patients back on their feet sooner and have the potential to get back to work sooner than before. He is open to accepting all new patients to provide his expertise. Videos Dr. Andrew Jung M.D Bio Video. Dr. Jung is rated as undefined provider by MediFind in Gastric Bypass. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Hernia, Hemolytic Transfusion Reaction, Low Blood Pressure, Sleeve Gastrectomy, and Gastrectomy. Dr. Jung is board certified in American Board Of Surgery.
Hu Faculty Practice Plan-Plastics Surgery & Bariatrics
Terrence Fullum is a Bariatric Medicine provider practicing medicine in Washington, Washington, D.c.. Dr. Fullum is rated as an Experienced provider by MediFind in Gastric Bypass. He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses Obesity, Hernia, Choledocholithiasis, Gallbladder Removal, and Gastric Bypass.
Frederick C. Finelli MD
Timothy Koch is a Gastroenterologist practicing medicine in Washington, Washington, D.c.. Dr. Koch is rated as an Advanced provider by MediFind in Gastric Bypass. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Obesity, Malnutrition, Swallowing Difficulty, Sleeve Gastrectomy, and Gastrectomy.
George Washington University Hospital
John Corbett is a General Surgeon practicing medicine in Washington, Washington, D.c.. Dr. Corbett is rated as an Advanced provider by MediFind in Gastric Bypass. He is also highly rated in 1 other condition, according to our data. His clinical expertise encompasses Obesity, Gastric Bypass, and Gastrectomy.
Sibley Memorial Hospital
Olaya Gutierrez is a Gastroenterologist practicing medicine in Washington, Washington, D.c.. Dr. Gutierrez is rated as an Experienced provider by MediFind in Gastric Bypass. She is also highly rated in 9 other conditions, according to our data. Her clinical expertise encompasses Achalasia, Gastroesophageal Reflux Disease (GERD), Hiatal Hernia, Endoscopy, and Lithotripsy.
Gw General Surgery-Foggy Bottom South Pavilion
Khashayar Vaziri is a General Surgeon practicing medicine in Washington, Washington, D.c.. Dr. Vaziri is rated as an Experienced provider by MediFind in Gastric Bypass. He is also highly rated in 9 other conditions, according to our data. His clinical expertise encompasses Hernia, Gallstones, Gallbladder Disease, Endoscopy, and Gastrectomy.
George Washington University Hospital
Rachel Sillcox is a General Surgeon practicing medicine in Washington, Washington, D.c.. Dr. Sillcox is rated as an Experienced provider by MediFind in Gastric Bypass. Her clinical expertise encompasses Hiatal Hernia, Diaphragmatic Hernia, Gastroesophageal Reflux Disease (GERD), Gastric Bypass, and Gastrectomy.
MedStar Health: Betty Lou Ourisman Breast Health Center
Ian Greenwalt is a Surgical Oncologist practicing medicine in Washington, Washington, D.c.. Dr. Greenwalt is rated as an Experienced provider by MediFind in Gastric Bypass. He is also highly rated in 6 other conditions, according to our data. His clinical expertise encompasses Breast Cancer, Paget Disease of the Breast, Inflammatory Breast Cancer, Mastectomy, and Gastric Bypass.
MedStar Health General Surgery
Yewande Alimi is a General Surgeon practicing medicine in Washington, Washington, D.c.. Dr. Alimi is rated as an Experienced provider by MediFind in Gastric Bypass. She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Hernia, Obesity, Umbilical Hernia, Gastrectomy, and Endoscopy. Dr. Alimi is currently accepting new patients.
Last Updated: 06/30/2026



