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Siyi Jung, MD - GTCIPA Physician - Pediatrician

Dr. Siyi Yung is a pediatrician located in Oceanside, CA. She is originally from the East Coast but relocated to Southern California to be closer to family. Ever since she chose pediatrics as her career path, she has found joy and fulfillment in the practice of primary care medicine. Although she has worked in various … Read more

Dr. Mark O’Brien, DO, Family Medicine Physician at GTCIPA.

Dr. Mark O’Brien is a Board-Certified Internal Medicine physician with over 30 years of experience dedicated to patient-centered care. With a strong background as a hospitalist spanning more than 25 years, Dr. O’Brien is recognized for his expertise in managing complex medical conditions and multi-symptom cases. In 2024, he opened his private practice, Coastal Internal … Read more

Dr. Nguyen joined San Diego Retina Associates in September of 2019 after completing his undergraduate education at the University of California – Los Angeles and went on to earn his MBA at the Leavey School of Business at Santa Clara University. He graduated from the Chicago Medical School at Rosalind Franklin University and supplemented his … Read more