Dr. Ruben Ruiz, MD

Dr. Ruben Ruiz is an internal medicine and family medicine physician with over four decades of experience serving patients throughout Southern California. He earned his medical degree from Los Angeles and completed his residency training there in 1985. Dr. Ruiz is fluent in both English and Spanish, allowing him to communicate effectively with diverse patient populations.

Dr. Ruiz practices at multiple locations across California, including Ontario, Rialto, and Montebello. He specializes in managing obesity and weight concerns, helping patients achieve healthier lifestyles. His expertise extends to treating high cholesterol in children and teens, as well as hyperlipidemia in patients of all ages. Dr. Ruiz regularly performs blood tests and provides diabetes management through insulin pen training and autoinjector instruction. Patients rate him 4.1 out of 5 stars on average for his comprehensive care approach.