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

Dr. James Robey is a Johns Hopkins surgeon who specializes in minimally invasive procedures. He has provided surgical services to Washington-area residents for over 30 years. He takes pride in providing a customized approach to care to ensure the best possible outcome. Dr. Robey is consistently recognized as a top doctor in the region by Bethesda Magazine and Washingtonian. Selected Publications “Relationship between tumor necrosis factor, eicosanoids and platelet activating factor as mediators of endotoxin-induced shock in mice.” Adam K. Myers, James W. Robey.British Journal of Pharmacology. (1990) 99, 499-502. “Ruptured, infected popliteal artery aneurysm, a case report.” James W. Robey, et al. Vascular Surgery. 1998. Dr. Robey is rated as an Advanced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Hernia, Femoral Hernia, Retroperitoneal Inflammation, Colostomy, and Hernia Surgery.

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

Nadim Haddad is a Gastroenterologist in Washington, Washington, D.c.. Dr. Haddad is rated as a Distinguished provider by MediFind in the treatment of Gallstones. His top areas of expertise are Gallstones, Gallbladder Disease, Bile Duct Obstruction, Gallbladder Removal, and Endoscopy. Dr. Haddad is currently accepting new patients.

Ilan Vavilin is a primary care provider, practicing in Internal Medicine in Washington, Washington, D.c.. Dr. Vavilin is rated as a Distinguished provider by MediFind in the treatment of Gallstones. His top areas of expertise are Gallstones, Gallbladder Disease, Acute Pancreatitis, Hereditary Pancreatitis, and Gallbladder Removal.

Shandiz Shahbazi is a Gastroenterologist in Washington, Washington, D.c.. Dr. Shahbazi is rated as a Distinguished provider by MediFind in the treatment of Gallstones. Her top areas of expertise are Gallstones, Gallbladder Disease, Acute Pancreatitis, Hereditary Pancreatitis, and Gallbladder Removal.

Hemanth Gavini is a Gastroenterologist in Washington, Washington, D.c.. Dr. Gavini is rated as a Distinguished provider by MediFind in the treatment of Gallstones. His top areas of expertise are Bile Duct Obstruction, Pancreatic Cancer, Bile Duct Stricture, Endoscopy, and Pancreatectomy. Dr. Gavini is currently accepting new patients.

Meredith G. Garrett, M.D., is a breast and general surgeon at the Kimmel Cancer Center at Sibley Memorial Hospital, and a surgical consultant to the U.S. State Department, providing surgical consultation for diplomats both in the United States and overseas. Dr. Garrett specializes in surgery for benign and malignant diseases of the breast; breast ultrasound; minimally invasive breast biopsy; benign and malignant diseases of the colon; and laparoscopic and minimally invasive surgery of the intestinal tract, hernias and spleen. Dr. Garrett earned her medical degree from Vanderbilt University School of Medicine. She completed a surgical residency at Walter Reed Army Medical Center, followed by service in the United States Army. Dr. Garrett was the Medical Commander of the 135th Forward Surgical Team in Korea, specializing in battlefield surgery. She also spent time serving as a general surgeon for the U.S. Army in Honduras and Egypt. Completing her service, Dr. Garrett became the program director for breast cancer survivors at Anne Arundel Medical Center, where she also trained surgical fellows in breast surgery. She also trained residents in general surgery at MedStar Washington Hospital Center. Dr. Garrett is involved with several quality improvement initiatives at Sibley to improve surgical outcomes for patients, and is a member of the Operating Room Committee. She is responsible for coordination of ongoing learning activities (CME) for practicing general surgeons and other specialists at Sibley. Dr. Garrett is a fellow in the American College of Surgeons and a member of the American Society of Breast Surgeons and Sibley Medical Association. Dr. Garrett has been repeatedly named a Top Doctor by Washingtonian Magazine, and has earned the Tops Doctors Award for Northern Virginia and the John Carroll Society Pro Bono Health Care Award. Every year, Dr. Garrett dedicates time working in the central highlands of Bolivia to provide direct surgical care to those who would otherwise go without appropriate medical interventions. She also teaches local Bolivian surgeons advanced surgical techniques, specifically laparoscopic skills. Dr. Garrett is rated as an Experienced provider by MediFind in the treatment of Gallstones. Her top areas of expertise are Breast Cancer, Angiosarcoma, Paget Disease of the Breast, Hernia Surgery, and Ileostomy.

Martin Paul is a General Surgeon in Washington, Washington, D.c.. Dr. Paul is rated as an Advanced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Hernia, Femoral Hernia, Cholecystitis, Hernia Surgery, and Ureteral Reconstruction.

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 Gallstones. Her top areas of expertise are Hernia, Ogilvie Syndrome, Obesity in Children, Sleeve Gastrectomy, and Gastrectomy.

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 the treatment of Gallstones. Her top areas of expertise are Bile Duct Obstruction, Pancreatic Cancer, Gallbladder Disease, Endoscopy, and Hepato-Pancreato-Biliary Surgery.

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 Gallstones. His top areas of expertise are Hernia, Hemolytic Transfusion Reaction, Low Blood Pressure, Sleeve Gastrectomy, and Gastrectomy.

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 Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Hiatal Hernia, Hernia, Congenital Diaphragmatic Hernia, Endoscopy, and Gallbladder Removal.

Hiral Patel is a General Surgeon in Alexandria, Virginia. Dr. Patel is rated as an Advanced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Ogilvie Syndrome, Gallstones, Choledocholithiasis, Colostomy, and Hernia Surgery.

Enrique Daza is a General Surgeon in Bethesda, Maryland. Dr. Daza is rated as a Distinguished provider by MediFind in the treatment of Gallstones. His top areas of expertise are Gallstones, Choledocholithiasis, Gallbladder Disease, Hernia, and Hernia Surgery.

Dr. Dominique Howard is a gastroenterologist affiliated with Sibley Memorial Hospital and George Washington University Hospital. She practices out of Capital Digestive Care’s Metropolitan Gastroenterology Group in Washington, D.C. and Chevy Chase, Md. Dr. Howard has an expertise in inflammatory bowel disease, irritable bowel syndrome, gastroesophageal reflux disease, esophageal pH testing, capsule endoscopy, colorectal cancer screening and diseases of the pancreas and gallbladder. Dr. Howard earned her undergraduate degree from Georgetown University and her medical degree from George Washington University School of Medicine. She completed a residency in internal medicine at George Washington University Hospital, followed by a fellowship in gastroenterology. Dr. Howard is a member of the American Gastroenterological Association, the American Society of Gastrointestinal Endoscopy, the Crohn’s and Colitis Foundation and the William Earl Clark Society. Dr. Howard is rated as an Experienced provider by MediFind in the treatment of Gallstones. Her top areas of expertise are Gastroesophageal Reflux Disease (GERD), Trichohepatoenteric Syndrome, Diarrhea, and Attenuated Familial Adenomatous Polyposis.

Ramsey Daher is a Gastroenterologist in Washington, Washington, D.c.. Dr. Daher is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Heartburn, Gastric Dysmotility, Familial Adenomatous Polyposis, Gastrectomy, and Colonoscopy.

Dr. Marta A. Schneider is an internist affiliated with Sibley Memorial Hospital. She has a private practice in Washington, D.C. Dr. Schneider earned her medical degree from George Washington University School of Medicine. She completed a residency in internal medicine at St. Francis Hospital Medical Center. Dr. Schneider is rated as an Experienced provider by MediFind in the treatment of Gallstones. Her top areas of expertise are Rickets, Osteomalacia, Frequent or Urgent Urination, Enlarged Liver, and Ureteroscopy.

Ronny Khatkar is a primary care provider, a Hematologist and a Hospital Medicine provider in Washington, Washington, D.c.. Dr. Khatkar is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Volkmann Contracture, Mantle Cell Lymphoma (MCL), Rhabdomyolysis, Gastrostomy, and Hip Replacement.

Michael Lee is a primary care provider, practicing in Hospital Medicine in Washington, Washington, D.c.. Dr. Lee is rated as an Experienced provider by MediFind in the treatment of Gallstones. His top areas of expertise are Small Cell Lung Cancer (SCLC), Lung Cancer, Pneumonia, Endoscopy, and Gastrostomy.