Dr. Patrick T. Koo

Norah Terrault is a Gastroenterologist practicing medicine in Los Angeles, California. Dr. Terrault is highly rated in 23 conditions, according to our data. Her clinical expertise encompasses Hepatitis, Hepatitis C, Hepatitis B, Liver Transplant, and Hepato-Pancreato-Biliary Surgery.

James Buxbaum is a Gastroenterologist practicing medicine in Los Angeles, California. Dr. Buxbaum is highly rated in 42 conditions, according to our data. His clinical expertise encompasses Acute Pancreatitis, Hereditary Pancreatitis, Bile Duct Obstruction, Endoscopy, and Lithotripsy.

Dr. Jason Samarasena is a UCI Health physician who specializes in treating gastrointestinal disorders, including gastroesophageal reflux disease, esophageal disease, pancreatic cysts, biliary tract disorders, gastric intestinal metaplasia and colorectal cancer.His research interests include advanced endoscopic imaging, characterization and treatment of pancreatic cysts, confocal laser endomicroscopy, bowel preparation before colonoscopy, endoscopic mucosal resection and endoscopic submucosal dissection.Samarasena received his medical degree from Memorial University of Newfoundland, Canada, where he graduated on the Dean’s List. He completed both general gastroenterology and interventional endoscopy fellowships at UC Irvine.Press Ganey has named Samarasena as one of the top five physicians for patient satisfaction in the ambulatory surgery group at UCI Health. He was named the 2016 Teaching Attending of the Year by the UC Irvine Gastroenterology Fellowship. He is the current president of the Orange County GI Society.Nickname: Dr. Sam. Dr. Samarasena is highly rated in 50 conditions, according to our data. His clinical expertise encompasses Barrett Esophagus, Jaundice, Gastroesophageal Reflux Disease (GERD), Endoscopy, and Colonoscopy. Dr. Samarasena is board certified in American Board Of Internal Medicine - Gastroenterology.