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Allan Effron MD


Dr. Effron is a seasoned gastroenterologist and has been practicing in Orange County for over 40 years. He also speaks fluent German, Spanish, and Yiddish. Dr. Effron is available for appointments at Caduceus Specialty in Yorba Linda and Caduceus Jamboree in Irvine.

Essam Quraishi MD- GI Yorba Linda

Male GI physician in scrubs with stethoscope smiling in headshot


Dr. Essam Quraishi is a GI physician (gastroenterology) in Yorba Linda at Caduceus Specialty. He graduated from medical school at Deccan College of Medical Sciences in Hyderabad, India. He completed his Internal Medicine residency from Henry Ford Hospital, Detroit. He joined his fellowship in gastroenterology at Henry Ford Hospital, Detroit in 2005. He has been ... read more

Brian Riff MD Gastroenterologist Yorba Linda

Headshot of male gastroenterologist in white lab coat


Dr. Brian Riff is a gastroenterologist at Caduceus Specialty.  He was born and raised in Orange County. He attended USC for college graduating with honors in both political science and biological sciences. He then moved to Philadelphia to attend medical school. Following medical school at Jefferson, Dr. Riff stayed in Philadelphia for residency and fellowship ... read more