Theo Heller is a Gastroenterologist in Bethesda, Maryland. Dr. Heller is rated as an Elite provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Hepatitis D, Hepatitis, Portal Hypertension, Gastrectomy, and Endoscopy.

Christopher Koh is a primary care provider, practicing in Internal Medicine in Bethesda, Maryland. Dr. Koh is rated as an Elite provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Hepatitis D, Hepatitis, Portal Hypertension, Endoscopy, and Colonoscopy.

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 a Distinguished provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Non-Alcoholic Fatty Liver Disease, Hepatitis, Visceromegaly, Enlarged Liver, and Endoscopy.

Biju Alex is a Gastroenterologist in Columbia, Maryland. Dr. Alex is rated as a Distinguished provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Colitis, Viral Gastroenteritis, Portal Hypertension, Gastrectomy, and Endoscopy.

Preston Kim is a Gastroenterologist in Columbia, Maryland. Dr. Kim is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Gas Bloat Syndrome, Lactose Intolerance, Gastroesophageal Reflux Disease (GERD), Endoscopy, and Gastrectomy.

Allen Banegura is a Gastroenterologist in Catonsville, Maryland. Dr. Banegura is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Familial Adenomatous Polyposis, Angiodysplasia of the Colon, Esophagitis, Gastrectomy, 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 Portal Hypertension. His top areas of expertise are Jaundice, Macroamylasemia, Portal Hypertension, Endoscopy, and Colonoscopy.

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

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 Advanced provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Gastric Dysmotility, Diverticular Disease, Diarrhea, Endoscopy, and Gastrectomy.

The goal of Grishma Joy, M.D. is having clear communication with each patient. She makes sure her patients know what she is thinking and where she would like to go with their care. She makes a point to actively speak with primary care doctors and exchange emails regularly, so everyone is on the same page. Open and honest communication helps in providing quality care and satisfied patients. Learn more at www.ddamd.com. Dr. Joy is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. Her top areas of expertise are Colitis, Familial Adenomatous Polyposis, Turcot Syndrome, Gastrectomy, and Endoscopy.

Dr. Wikrom Karnsakul is an associate professor of pediatrics at the Johns Hopkins University School of Medicine. His clinical interests are in the care of pediatric liver diseases, and general gastrointestinal diseases. Dr. Karnsakul received his medical degree in 1992 from Faculty of Medicine, Siriraj Medical Center, Mahidol University School of Medicine in Bangkok, Thailand. He completed his residency in pediatrics at Advocate Hope Children's Hospital in 1998 and did a fellowship in pediatric gastroenterology, hepatology and nutrition at Texas Children's Hospital, Baylor College of Medicine in Houston, Texas. He completed his postdoctoral research training at USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine. He joined the faculty at Johns Hopkins in 2008. His research interests center on the understanding and treatment of chronic liver disease, ascites, cholestasis, viral hepatitis especially hepatitis C and hepatitis E, and Cystic Fibrosis Related Liver Disease. Dr. Karnsakul is also involved in NIH-funded multicenter research studies including the Cholestatic Liver Disease Consortium and Cystic Fibrosis Related Liver Disease Project. Dr. Karnsakul is currently a Fellow of the American Association for the Study of Liver Diseases (FAASLD). Dr. Karnsakul is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Alagille Syndrome, Cholestasis, Hepatitis E, Liver Transplant, and Endoscopy.

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 Advanced provider by MediFind in the treatment of Portal Hypertension. Her top areas of expertise are Achalasia, Pancreatic Pseudocyst, Stomach Cancer, Endoscopy, and Gastric Bypass.

Marvin Lawrence is a Gastroenterologist in Columbia, Maryland. Dr. Lawrence is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Swallowing Difficulty, Painful Swallowing, Berdon Syndrome, Diverticular Disease, 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 Advanced provider by MediFind in the treatment of Portal Hypertension. Her top areas of expertise are Pancreatic Cancer, Familial Pancreatic Cancer, Bile Duct Stricture, Endoscopy, and Pancreaticoduodenectomy.

Priti Bijpuria is a Gastroenterologist in Columbia, Maryland. Dr. Bijpuria is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. Her top areas of expertise are Gastric Dysmotility, Bacterial Gastroenteritis, Indigestion, Gastroesophageal Reflux Disease (GERD), and Gastrectomy.

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

Thomas Abernathy is a Gastroenterologist in Catonsville, Maryland. Dr. Abernathy is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Lactose Intolerance, Familial Adenomatous Polyposis, Hemorrhoids, Gastrectomy, and Colonoscopy.

Lauren Halvorson is a Gastroenterologist in Laurel, Maryland. Dr. Halvorson is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. Her top areas of expertise are Gastric Dysmotility, Gastroesophageal Reflux Disease (GERD), Irritable Bowel Syndrome (IBS), Endoscopy, and Colonoscopy.

Steven Epstein is a Gastroenterologist in Baltimore, Maryland. Dr. Epstein is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. His top areas of expertise are Familial Adenomatous Polyposis, Attenuated Familial Adenomatous Polyposis, Cronkhite-Canada Disease, Gastrectomy, and Colonoscopy.

April Tignor is a Gastroenterologist in Glen Burnie, Maryland. Dr. Tignor is rated as an Advanced provider by MediFind in the treatment of Portal Hypertension. Her top areas of expertise are Hemorrhoids, Indigestion, Gastritis, Endoscopy, and Gastrectomy.