Paul W. Siegel, M.D.
Dr. Paul Siegel is a graduate of Boston University School of Medicine and has been practicing gastroenterology on the Cape for 25 years. He has privledges at the Cape Cod Hospital, The Ambulatory Service Center in Sandwich, and at the Cape & Islands Endoscopy Center in Hyannis.
Specialization: Board Certified Gastroenterology
Cape Cod Hospital Staff Status: Consulting
Special Interest: Gastrointestinal Diseases


Alexandre K. Nader, M.D.
Dr. Nader is a general gastroenterologist with special interest in Liver Diseases. He completed his training in Liver Diseases at the University of Miami and training in Gastroenterology at Faulkner/Brigham and Womens Hospital in Boston.
Specialization: Board Certified Gastroenterology
Cape Cod Hospital Staff Status: Active
Special Interest: Gastrointestinal Diseases


William F. Siebert Jr., D.O.
Dr. Siebert is a graduate of Bowdoin College and The University of Health Sciences, College of Osteopathic Medicine in Kansas City. His internship and residencies in Internal Medicine were completed at the Naval Regional Medical Center, Oakland, CA., and completed Gastroenterology Fellowship at the National Naval Medical Center in Bethesda, MD. Dr Siebert is Board Certified in Gastroenterology and Internal Medicine. He completed 12 years of active duty in the United States Navy and was Chief of Medicine, Veterans Affairs Medical Center in West Palm Beach FL.
Specialization: Board Certified Gastroenterology
                               Cape Cod Hospital Staff Status: Courtesy
                               Special Interest: Gastrointestinal Diseases


Jay J. Yamin, MD
Dr. Yamin is a graduate of the University of Massachusetts Medical School. He completed his internship and residency in Internal Medicine and fellowship in Gastroenterology/Hepatology at University of Massachusetts/Memorial Health Care in Worcester Massachusetts. He practices general gastroenterology with special interest in pancreaticobiliary disease and ERCP.
Cape Cod Hospital Staff Status: Active
Specialization: Board Certified in Internal Medicine; Board Certified in Gastroenterology