3 Best Gastroenterologists in Fontana, CA

“ Dr. Nehali Patel holds board certifications in internal medicine and gastroenterology. Dr. Nehali Patel graduated from Albany Medical College. She completed her internal medicine residency at the University of Florida College of Medicine in Gainesville. She completed her gastroenterology fellowship at the University of Arizona College of Medicine in Tucson. She provides treatment for a wide range of gastrointestinal disorders. Dr. Nehali Patel is highly professional and dedicated to providing excellent care to every patient. She practices at Ontario Medical Center and is affiliated with Kaiser Permanente Fontana Medical Center. The center is dedicated to delivering the highest quality medical services and leveraging advanced technology in a welcoming and comfortable environment. ”

“ Dr. Tommy Tiong-Hien Oei graduated from New York University Grossman School of Medicine. He has over 25 years of experience in the medical field. Dr. Tommy Tiong-Hien Oei is board-certified and obtained his medical degree from the New York University Grossman School of Medicine in New York. He furthered his training by completing a gastroenterology fellowship at Los Angeles County + University of Southern California Medical Center. Dr. Tommy Tiong-Hien Oei specializes in advanced endoscopy procedures, including Endoscopic Retrograde Cholangiopancreatography (ERCP). His specialized skills allow him to provide comprehensive gastrointestinal (GI) care to his patients. He currently practices at Kaiser Permanente Fontana Medical Center. ”

“ 2026 Highlights: Dr. Eve Kirschner is a gastroenterologist and internal medicine physician practicing in Fontana, California. She is affiliated with Kaiser Foundation Hospital and completed her medical education at the Icahn School of Medicine at Mount Sinai in 1981, followed by internal medicine residency and gastroenterology fellowship training. Dr. Eve Kirschner is board-certified by the American Board of Internal Medicine in Internal Medicine with subspecialty certification in Gastroenterology. She accepts major insurance plans. ”