Gastroenterologist Mouen Khashab specializes in therapeutic endoscopy, and he oversees this group of practitioners across the Johns Hopkins enterprise. Nationally and internationally known in the field of interventional endoscopy, Dr. Khashab has contributed immensely to the field’s advancement as a minimally invasive means to treat gastrointestinal and pancreaticobiliary disorders. Dr. Khashab earned his medical degree from the American University of Beirut Faculty of Medicine, and subsequently completed a residency in internal medicine and a fellowship in gastroenterology at Indiana University. He then completed a two-year fellowship at The Johns Hopkins Hospital before joining the faculty in 2011. A busy researcher, Dr. Khashab has published more than 600 papers in peer-reviewed journals. In 2013, he described the procedure called gastric peroral endoscopic myotomy (known as G-POEM) and was able to disseminate and teach it all over the world. Other procedures that he expanded include peroral endoscopic myotomy (POEM), peroral endoscopic myotomy with fundoplication (POEM-F), Zenker’s peroral endoscopic myotomy (Z-POEM) and full thickness resection. In 2022, he received the Master Endoscopist Award from the American Society for Gastrointestinal Endoscopy (ASGE) for his numerous contributions to the field. His procedural expertise includes endoscopic retrograde cholangiopancreatography (ERCP), endoscopic ultrasound (EUS), interventional EUS, submucosal endoscopy, POEM/achalasia, endoscopic mucosal resection, endoscopic submucosal dissection, luminal stenting, large polyp resection and Barrett’s therapy, among others. Dr. Khashab is involved with multiple gastrointestinal societies and has served on many committees, including the ASGE Standards of Practice Committee, which is in charge of formulating guidelines for the practice of endoscopy. He has also served as an associate editor for the journal Endoscopy, a premier journal in the field. Khashab is a highly sought-after speaker at national and international conferences, and he has participated in multiple live endoscopy conferences. Outside of academic medicine, Dr. Khashab is an entrepreneur. His major interest is in new technology and medical devices, and his goal is to disrupt the field by introducing technology that makes endoscopic procedures safer, easier, efficient and more scalable. Dr. Khashab is rated as a Distinguished provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Achalasia, Pancreatic Pseudocyst, Bile Duct Obstruction, Endoscopy, and Gastric Bypass.

Dr. Gurakar joined Johns Hopkins from the Nazih Zuhdi Transplantation Institute at the Integris Baptist Medical Center in Oklahoma City, where he was the chief of Hepatology Research and the program director of the Liver Transplantation Medicine/ Hepatology Fellowship. He served at various capacities in the Liver Medicine Section, since its first establishment in 1993. Dr. Gurakar's clinical interests include pre and post-transplant, clinical and endoscopic management of liver diseases and viral hepatitis. His research interests include bioartificial liver dialysis systems and application of total plasma exchange in the treatment of liver disorders. Dr. Gurakar is rated as an Advanced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Hepatitis, Liver Failure, Alcoholic Cirrhosis, Liver Transplant, and Kidney Transplant.

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

Darryn Potosky is a Gastroenterologist in Laurel, Maryland. Dr. Potosky is rated as an Advanced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Primary Biliary Cholangitis, Reynolds Syndrome, Nonalcoholic Steatohepatitis (NASH), Liver Transplant, and Thrombectomy.

Agazi Gebreselassie is a Gastroenterologist and a Hospital Medicine provider in Baltimore, Maryland. Dr. Gebreselassie is rated as an Advanced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Jaundice, Macroamylasemia, Portal Hypertension, Endoscopy, and Colonoscopy.

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

Ernest Tsao is a Gastroenterologist in Baltimore, Maryland. Dr. Tsao is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Hepatitis, Gas Bloat Syndrome, Hepatitis C, Endoscopy, and Gastrectomy.

Gastroenterologist Saowanee Ngamruengphong specializes in the endoscopic diagnosis and management of gastrointestinal malignancies, premalignant and malignant lesions in the gastrointestinal tract (e.g., early gastric cancer, Barrett's esophagus-associated neoplasia), esophageal cancer, colon polyps or early colorectal cancer, and pancreatic and biliary disease. Dr. Ngamruengphong earned a medical degree from Chulalongkorn University and completed residency training at the Texas Tech University Health Sciences Center. She undertook fellowship training in gastroenterology at the Mayo School of Graduate Medical Education and further fellowship training in therapeutic endoscopy at The Johns Hopkins Hospital. Her research interests include endoscopic resection and the management of precancerous or cancerous gastrointestinal lesions. Dr. Ngamruengphong is a member of several professional organizations, including the Thai Medical Council, the American College of Gastroenterology and the American Gastroenterological Association. Videos Endoscopic Submucosal Dissection (ESD) — Eileen’s Story Recent News Articles and Media Coverage A Rare, Stomach-Saving Endoscopic Procedure, Inside Tract (Spring 2021) Case Presentation: ESD-TAMIS, Inside Tract (Spring 2019) Innovative Approaches to Colorectal Surgery Benefit Patients, Surgery (Winter 2019) For Colorectal Polyps: Early Detection and Minimally Invasive Endoscopic Resection, Inside Tract (Winter, 2019) The Cutting Edge of Endoscopic Resection, Inside Tract (Spring, 2017) Stomach Cancer: Know Your Risks & Treatment Options, Johns Hopkins Surgery (4/26/2017). Dr. Ngamruengphong is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. Her top areas of expertise are Achalasia, Pancreatic Pseudocyst, Stomach Cancer, Endoscopy, and Gastric Bypass.

Dr. Lazarev joined Johns Hopkins from the Mount Sinai Medical Center in New York, where he completed the Present-Levison advanced inflammatory bowel disease fellowship. A specialist in the diagnosis and management of Crohn's disease and ulcerative colitis, Dr. Lazarev has published numerous peer-reviewed articles, abstracts and chapters. Dr. Lazarev is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Crohn's Disease, Viral Gastroenteritis, Ulcerative Colitis, Colonoscopy, and Endoscopy.

Vikesh Singh is a gastroenterologist who specializes in pancreatology and pancreaticobiliary endoscopy. He evaluates and treats patients with inflammatory diseases of the pancreas, including acute and chronic pancreatitis and autoimmune pancreatitis as well as the complications of these diseases. After earning his medical degree from the Johns Hopkins University School of Medicine, Dr. Singh remained at Johns Hopkins to complete residency training in internal medicine. He pursued fellowship training in gastroenterology at Brigham and Women’s Hospital, and earned a master’s degree in epidemiology from the Harvard T. H. Chan School of Public Health. He then returned to Johns Hopkins, where he completed a two-year advanced endoscopy fellowship with a focus on pancreaticobiliary endoscopy. Dr. Singh has been on the faculty at Johns Hopkins since 2008, and rose to the rank of professor in 2021. His research interests include acute and chronic pancreatitis, autoimmune pancreatitis, exocrine pancreatic insufficiency, and novel methods to evaluate and treat abdominal pain. Dr. Singh is a member of the board of directors of the National Pancreas Foundation, chair of the Pancreatic Disorders Section of the American Gastroenterological Association, a councilor for the International Association of Pancreatology and a member of the inaugural medical advisory board for the Familial Chylomicronemia Syndrome Foundation. Dr. Singh is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Exocrine Pancreatic Insufficiency, Hereditary Pancreatitis, Acute Pancreatitis, Pancreatectomy, and Endoscopy.

David Hutcheon is a Gastroenterologist in Lutherville, Maryland. Dr. Hutcheon is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Gastrointestinal Bleeding, Intestinal Cancer, Angiodysplasia of the Colon, Colonoscopy, and Endoscopy.

Natarajan Ravendhran is a hepatologist specializing in the diagnosis, treatment and management of liver diseases. He received his medical degree from Stanley Medical College, University of Madras in India, completed his residency in internal medicine at what is now Ascension Saint Agnes Hospital in Maryland and a residency in surgery at Railway Hospital in Madras, India. Dr. Ravendhran performed fellowship training in hepatology under the mentorship of Eugene and Leon Schiff at the University of Miami. Additionally, he received fellowship training in gastroenterology and liver disease at the University of Missouri. Dr. Ravendhran received a master’s degree in business administration in medical services management from The Johns Hopkins University. He is a fellow of the American Association for the Study of Liver Diseases and the American Gastroenterological Association, and is a member of the European Association for the Study of the Liver. Dr. Ravendhran is interested in exploring cholestatic disorders. He has participated in many clinical trials that focus on hepatitis B and C, in addition to metabolic dysfunction-associated steatotic liver disease trials. He enjoys teaching, rounding with fellows and seeing patients, and his motto is “Patients come first!”. Dr. Ravendhran is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Non-Alcoholic Fatty Liver Disease, Hepatitis, Visceromegaly, Enlarged Liver, and Endoscopy.

Dr. Ma is an assistant professor of medicine at the Johns Hopkins University School of Medicine. She received her medical degree from the University of Michigan Medical School and completed her internal medicine residency at the University of Pennsylvania. Following her residency, she performed a fellowship in transplant hepatology at the Johns Hopkins University School of Medicine. Dr. Ma specializes in liver disorders including alcoholic liver disease, viral hepatitis, non-alcoholic fatty liver disease, metabolic liver disorders, as well as the care of patients after liver transplant. Dr. Ma also has interests in medical education and currently serves as the Associate Program Director of the Gastroenterology Fellowship. Dr. Ma is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. Her top areas of expertise are Hepatitis, Cirrhosis, Hepatitis C, Endoscopy, and Gastrectomy.

Dr. Hamilton is an Associate Professor of Medicine in the Division of Gastroenterology and Hepatology. He is the Interim Director, Division of Gastroenterology and Hepatology and the Director of Hepatology for Johns Hopkins Medicine. His clinical specialties include Wilson Disease, Cystic Fibrosis related liver disease, liver transplantation, hepatocellular carcinoma, cirrhosis, portal hypertension, acute and chronic viral, non-alcoholic fatty liver disease (NASH), autoimmune, and cholestatic liver disease. His research interests include the copper homeostasis and its regulation of lipid metabolism and liver injury, the fundamental mechanisms regulating liver fibrosis, and the molecular genetics of hepatocellular carcinoma and early detection biomarkers. Dr. Hamilton is a 2005 recipient of the National Institutes of Health/ National Research Scholar Award for gastroenterology and hepatology. Dr. Hamilton is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Hepatitis, Esophageal Varices, Autoimmune Hepatitis, Endoscopy, and Carotid Artery Surgery.

John Affronti is a Gastroenterologist in Baltimore, Maryland. Dr. Affronti is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Childhood Volvulus, Portal Hypertension, Indigestion, Endoscopy, and Gastrectomy.

Dr. Woreta joins Johns Hopkins from Texas Tech University Health Sciences Center, where she was the interim chief of the division of gastroenterology. Specializing in acute and chronic liver diseases, she sees patients with viral hepatitis, alcoholic liver disease, nonalcoholic fatty liver disease and those in need of cirrhosis liver transplantation. Dr. Woreta has authored several publications and chapters. Dr. Woreta is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. Her top areas of expertise are Non-Alcoholic Fatty Liver Disease, Cirrhosis, Hepatitis, Liver Transplant, and Endoscopy.

Dr. Chowdhury specializes in Crohn’s disease, ulcerative colitis and colorectal cancer screening. Her research interests include inflammatory bowel disease and colorectal cancer. Dr. Chowdhury is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. Her top areas of expertise are Viral Gastroenteritis, Ulcerative Colitis, Crohn's Disease, Endoscopy, and Gastrectomy.

Tokunbo Ajayi is a Hospital Medicine provider in Columbia, Maryland. Dr. Ajayi is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Boils, Alcoholic Cirrhosis, Viral Gastroenteritis, Liver Transplant, and Gastrectomy.

Loc Le is a Gastroenterologist in Baltimore, Maryland. Dr. Le is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Gastroesophageal Reflux Disease (GERD), Irritable Bowel Syndrome (IBS), Barrett Esophagus, Colonoscopy, and Endoscopy.

Dr. Shin specializes Barrett's esophagus, pancreatobiliary disease (pancreatic cyst, family history of pancreatic cancer), GI malignancy, and advanced endoscopy, including endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic ultrasound (EUS). Dr. Shin is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. Her top areas of expertise are Pancreatic Cancer, Familial Pancreatic Cancer, Bile Duct Stricture, Endoscopy, and Pancreaticoduodenectomy.