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. 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. 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.

Dr. Po-Hung (Victor) Chen is a transplant hepatology and addiction medicine physician. He is jointly appointed by the Division of Gastroenterology and Hepatology and the Division of Addiction Medicine. Dr. Chen's clinical focus is to care for patients with general or transplant-related liver conditions, including alcohol-associated liver disease (ALD), metabolic dysfunction-associated steatotic liver disease (MASLD), viral hepatitis, autoimmune liver diseases, hemochromatosis, and other diagnoses. He directed the creation of a Johns Hopkins Medicine informational webpage on ALD. He is also a frequent consultant for other Johns Hopkins clinicians regarding inquiries about ALD, including biomarker interpretation, acute hepatitis management, and addiction treatment delivery. Dr. Chen is a member of multiple professional medical and public health organizations (see below). He is a Fellow of the American College of Gastroenterology and a Fellow of the American Society of Addiction Medicine. Dr. Chen is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Hepatitis, Hepatitis C, Alcoholic Cirrhosis, Liver Transplant, and Endoscopy.

David Cromwell is a Gastroenterologist in Towson, Maryland. Dr. Cromwell is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Gastrointestinal Bleeding, Familial Adenomatous Polyposis, Swallowing Difficulty, Endoscopy, and Colonoscopy.

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.

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.

Paul Thuluvath is a Gastroenterologist in Lutherville, Maryland. Dr. Thuluvath is rated as an Advanced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Liver Failure, Hepatitis, Hepatitis C, Liver Transplant, and Endoscopy.

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.

Dr. Onwueme graduated with Distinction from Yale University with dual BSc/MSc degrees in chemistry and received MD and PhD degrees from Weill Cornell Medical College. He completed his Internal Medicine residency at Brigham and Women’s Hospital (Clinical Fellow Harvard Medical School) and his Gastroenterology fellowship at Johns Hopkins University School of Medicine. He is currently the Director of clinical trials at Woodholme Gastroenterology and has an ardent interest in the role of microbial metabolites in gut diseases. Dr. Onwueme prizes commitment to quality and compassionate patient care to which he devotes his practice. He has expert knowledge in gut microbiology and a special interest in diarrheal diseases, disordered gut motility, autoimmune and inflammatory bowel disease. Dr. Onwueme is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Gastric Dysmotility, Diverticular Disease, Diarrhea, Endoscopy, 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. 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.

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.

Shahabuddin Soherwardi is a primary care provider, practicing in Internal Medicine in Lutherville, Maryland. Dr. Soherwardi is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Sepsis, Acute Kidney Failure, Peptic Ulcer, Endoscopy, and Gastrostomy. Dr. Soherwardi is currently accepting new patients.

Arjun Vaid is a Gastroenterologist in Baltimore, Maryland. Dr. Vaid is rated as an Experienced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Jaundice, Irritable Bowel Syndrome (IBS), Hiccups, Colonoscopy, and Gastrectomy.

Anurag Maheshwari is a Hepatologist in Baltimore, Maryland. Dr. Maheshwari is rated as an Advanced provider by MediFind in the treatment of Sclerosing Cholangitis. His top areas of expertise are Hepatitis, Autoimmune Hepatitis, Nonalcoholic Steatohepatitis (NASH), Endoscopy, and Colonoscopy.

Kathleen Schwarz is a Hepatologist in Baltimore, Maryland. Dr. Schwarz is rated as an Advanced provider by MediFind in the treatment of Sclerosing Cholangitis. Her top areas of expertise are Hepatitis, Hepatitis B, Hepatitis C, Sclerosing Cholangitis, and Liver Transplant.