American Board of Internal Medicine; Gastroenterology, American Board of Internal Medicine
St. George's University, Grenada, West Indies
Gastroenterology and Hematology, University of California Irvine Medical Center/Veterans Administration Long Beach Healthcare System
Internal Medicine, University of California Los Angeles/Veterans Administration Greater Los Angeles Healthcare System
Member, American College of Gastroenterology; Member, American Gastroenterological Association; Member, American Society for Gastrointestinal Endoscopy; Golden Key International Honour Society; Iota Epsilon Alpha International Honour Medical Society
Clinical Instructor (2004-2005), University of California Los Angeles; Chair (2004-2005), Associates Committee, Region 1, American College of Physicians; Governor's Advisory Board (2004-2005), American College of Physicians; Frequent lecturer on topics including endoscopic treatment of gastroesophageal reflux disease (GERD), treatment of peptic ulcer disease (PUD), inflammatory bowel disease (IBD), colorectal cancer screening, and hereditary colorectal cancer. Dr. DeRosa's research has appeared in Gastroenterology and the American Journal of Gastroenterology. He co-authored a medical text chapter on anemia and occult bleeding.