Dr. Mohammed Kalan is a general surgeon affiliated with Sibley Memorial Hospital and George Washington University Hospital. He practices out of the Washington Institute of Surgery in Washington, D.C. and Chevy Chase, Md. Dr. Kalan has an expertise in abdominal surgery, clinical gastroenterology, colorectal surgery, gastrointestinal cancers, minimally invasive gastrointestinal surgery and robotic surgery. Dr. Kalan earned his MBBS from Byramjee Jeejeebhoy Medical College in India. He completed a residency in general surgery at Temple University School of Medicine, followed by a fellowship in laparoscopic surgery at George Washington University School of Medicine. Dr. Kalan is a fellow of the American College of Surgeons and the Royal College of Surgeons of London and Edinburgh, U.K. Dr. Kalan has earned numerous awards. His teaching awards include the Outstanding Faculty Teacher for the Department of Surgery from Georgetown University Hospital in 2001; the Golden Apple Award Nomination from Georgetown University Medical School in 2000; the Georgetown Caring Star from Georgetown University Hospital in 2009 and 2003; and the W.L. Gore/Stuart I. Myers Award for Academic Excellence from Temple University in 1998. Dr. Kalan has also been named one of America’s Top Surgeons by the Consumers’ Research Council of America from 2010-2014; and a Top Doctor in General and Laparoscopic Surgery by Washingtonian magazine in 2002. Dr. Kalan is rated as an Advanced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Retroperitoneal Inflammation, Gallbladder Disease, Appendicitis, Hernia Surgery, and Colostomy.

Amy Shah is a Gastroenterologist in Chevy Chase, Maryland. Dr. Shah is rated as an Advanced provider by MediFind in the treatment of Hiatal Hernia. Her top areas of expertise are Ulcerative Colitis, Crohn's Disease, Familial Adenomatous Polyposis, Endoscopy, and Colonoscopy.

Steven Zeddun is a Gastroenterologist in Chevy Chase, Maryland. Dr. Zeddun is rated as an Advanced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Achalasia, Crohn's Disease, Ulcerative Colitis, Endoscopy, and Colonoscopy.

Mohammed Ali is a Gastroenterologist in Chevy Chase, Maryland. Dr. Ali is rated as an Advanced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Crohn's Disease, Ulcerative Colitis, Familial Adenomatous Polyposis, Thrombectomy, and Endoscopy.

Dr. Jonathan M. Koff is a gastroenterologist affiliated with Sibley Memorial Hospital and Washington Hospital Center. Dr. Koff practices out of Capital Digestive Care’s Metropolitan Gastroenterology Group, located in Washington, D.C. and Chevy Chase, Md. Dr. Koff has an expertise in esophageal disease and colon cancer detection and screening, in addition to general gastroenterology. Dr. Koff earned his undergraduate degree from Wesleyan University and his medical degree from Boston University School of Medicine. He completed a residency in internal medicine at Walter Reed National Military Medical Center, where he went on to complete a fellowship in gastroenterology. Dr. Koff served in the United States Army for 11 years, working as an internist at the Army clinic in the Pentagon, as a first responder on 9-11 and on a tour in Iraq at the 31st Combat Support Hospital in Mosul. Dr. Koff also went on to direct the Center for Liver Disease and the Inflammatory Bowel Disease Clinic at Walter Reed Army Medical Center, where he served as the director of clinical research in gastroenterology as well. He also completed the first double balloon enteroscopy in the United States Army and in Washington, D.C. Dr. Koff is a member of the American College of Gastroenterology. He is on Sibley Memorial Hospital’s Emergency Room Committee and Internal Medicine Peer Review Committee. Dr. Koff has been named a Top MD by Washingtonian Magazine. Dr. Koff has contributed to various publications and presentation on gastroenterology. Dr. Koff is rated as an Advanced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Crohn's Disease, Ulcerative Colitis, Eosinophilic Colitis, Endoscopy, and Gastrectomy.

Edward Chan is a Thoracic Surgeon in Washington, Washington, D.c.. Dr. Chan is rated as a Distinguished provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Heart Tumor, Hiatal Hernia, Diaphragmatic Hernia, Endoscopy, and Lung Transplant.

Naveen Gupta is a Gastroenterologist in Bethesda, Maryland. Dr. Gupta is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Gastrointestinal Bleeding, Gallstones, Choledocholithiasis, Endoscopy, and Gastrectomy.

Dr. Kathryn E. Kirk is a gastroenterologist affiliated with Sibley Memorial Hospital, George Washington University Hospital, Washington Hospital Center and the University of Maryland Baltimore Washington Medical Center. She practices out of Capital Digestive Care’s Metropolitan Gastroenterology Group in Washington, D.C., Chevy Chase, Md. and Bethesda, Md. Dr. Kirk has an expertise in gastroesophageal reflux disease, colorectal cancer screening and irritable bowel syndrome. She has special interests in colon cancer screening and prevention, celiac disease and eosinophilic esophagitis. Dr. Kirk earned her undergraduate degree from Princeton University and her medical degree from Weill Medical College of Cornell University. She completed a residency in internal medicine at Beth Israel Medical Center, followed by fellowships in hepatology and gastroenterology at Mount Sinai Hospital. Dr. Kirk is a member of the American College of Gastroenterology, the American Society for Gastrointestinal Endoscopy, the Crohn’s and Colitis Foundation of America and the American Gastroenterological Association. Dr. Kirk has been consistently recognized as a Top Doctor by Washingtonian magazine. Dr. Kirk is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. Her top areas of expertise are Crohn's Disease, Ulcerative Colitis, Gastroesophageal Reflux Disease (GERD), and Eosinophilic Colitis.

Samuel Kallus is a Gastroenterologist in Chevy Chase, Maryland. Dr. Kallus is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Crohn's Disease, Ulcerative Colitis, Eosinophilic Colitis, Endoscopy, and Colonoscopy.

Brian Kirsh, MD, specializes in gastroenterology and is board-certified by the American Board of Internal Medicine. He practices at Capital Digestive Care. Dr. Kirsh received his medical degree from the University of Toledo College of Medicine and Life Sciences and completed his residency at University of Cincinnati College of Medicine, followed by a fellowship at the University of Illinois Chicago. Dr. Kirsh is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Ulcerative Colitis, Colitis, Irritable Bowel Syndrome (IBS), Endoscopy, and Colonoscopy.

Samuel Muench is a Gastroenterologist in Chevy Chase, Maryland. Dr. Muench has been practicing medicine for over 10 years and is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Gastric Dysmotility, Colitis, Viral Gastroenteritis, Gastrectomy, and Colonoscopy.

Julio Salcedo is a Gastroenterologist in Washington, Washington, D.c.. Dr. Salcedo is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Hemorrhoids, Gastroesophageal Reflux Disease (GERD), Gastrointestinal Bleeding, Endoscopy, and Gastrectomy.

Ajay Bakhshi is a Gastroenterologist in Bethesda, Maryland. Dr. Bakhshi is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Gastrointestinal Bleeding, Juvenile Polyposis Syndrome, Cronkhite-Canada Disease, Gastrectomy, and Gastrostomy.

Olaya Gutierrez is a Gastroenterologist in Washington, Washington, D.c.. Dr. Gutierrez is rated as an Advanced provider by MediFind in the treatment of Hiatal Hernia. Her top areas of expertise are Achalasia, Gastroesophageal Reflux Disease (GERD), Choledocholithiasis, Endoscopy, and Lithotripsy.

Dr. Brett Parker is a general surgeon and fellowship-trained minimally invasive foregut and bariatric surgeon. He is an Assistant Professor of Surgery at Johns Hopkins and also the Program Director for the Johns Hopkins Advanced GI and Minimally Invasive Surgery Fellowship Program. Dr. Parker is an expert in minimally invasive surgical techniques including advanced laparoscopy and robotic surgery, as well as therapeutic flexible endoscopy. He is interested in promoting the evolving indications for surgical repair of hiatal hernias, as well as adjunct procedures surgeons can use to reduce recurrence rates. He offers a wide range of interventions for GERD, including innovative endoscopic therapies, and promotes early surgical referral to discuss and tailor therapy to individual patient circumstances. Dr. Parker also has a robust abdominal wall reconstruction and weight loss surgery practice. He is widely published on the surgical outcomes of foregut surgery, emerging technologies, and innovation, as well as surgical simulation and skills transfer. Dr. Parker has consistently been selected as a Washingtonian Magazine Top Doctor in 2023, 2024, and 2025. As a member of the Johns Hopkins Division of Minimally Invasive Surgery in the Greater Washington Area, Dr. Parker is dedicated to the best, individualized, patient outcomes. Learn more about Dr. Parker and his partners within the Johns Hopkins Division of Minimally Invasive Surgery, the Johns Hopkins Heartburn Center and the Johns Hopkins Motility and Neurogastroenterology Center. Dr. Parker is rated as an Advanced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Hiatal Hernia, Hernia, Congenital Diaphragmatic Hernia, Endoscopy, and Gallbladder Removal.

Barry Rubin is a Gastroenterologist in Silver Spring, Maryland. Dr. Rubin is rated as an Advanced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Ulcerative Colitis, Gastroesophageal Reflux Disease (GERD), Hiatal Hernia, and Congenital Diaphragmatic Hernia.

Dr. Katherine Lamond is the Medical Director of the Johns Hopkins Center for Bariatrics Surgery at Sibley Memorial Hospital and Assistant Professor of Surgery for Johns Hopkins School of Medicine. She specializes in laparoscopic bariatric surgery, and performs the Roux-en-Y Gastric Bypass, Sleeve Gastrectomy and Adjustable Gastric Banding at Sibley. She is also a surgeon with Johns Hopkins Surgery at Sibley, where she practices general surgery and advanced laparoscopic surgery. Dr. Lamond grew up in Maryland and attended Dartmouth College for her undergraduate education, before moving back to the area to attend Georgetown University School of Medicine. Her internship and residency in General Surgery were completed at the University of Virginia in Charlottesville. She then completed a fellowship at Johns Hopkins Hospital in Minimally Invasive and Bariatric Surgery. More recently, Dr. Lamond served as Assistant Professor of Surgery at the University of Maryland School of Medicine from 2012-2015, prior to transitioning her practice to Sibley Memorial Hospital. She is a Fellow of the American College of Surgeons and is active in both the Society of American Gastrointestinal and Endoscopic Surgeons and the American Society for Metabolic and Bariatric Surgery. Videos Meet Katherine Lamond, M.D., Minimally Invasive Surgeon Surgical Weight Loss Options 101 GERD and Bariatric Surgery FAQ. Dr. Lamond is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. Her top areas of expertise are Hernia, Ogilvie Syndrome, Obesity in Children, Sleeve Gastrectomy, and Gastrectomy.

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 an Experienced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Hernia, Hemolytic Transfusion Reaction, Low Blood Pressure, Sleeve Gastrectomy, and Gastrectomy.

George Conrad is a General Surgeon in Silver Spring, Maryland. Dr. Conrad is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Cellulitis, Ogilvie Syndrome, Gallstones, Hernia Surgery, and Small Bowel Resection. Dr. Conrad is currently accepting new patients.

Konstantinos Makris is a General Surgeon in Silver Spring, Maryland. Dr. Makris is rated as an Experienced provider by MediFind in the treatment of Hiatal Hernia. His top areas of expertise are Hyperparathyroidism, Hernia, Gastroesophageal Reflux Disease (GERD), Parathyroidectomy, and Hernia Surgery.