About the Author Regina Y. Mojica, MD Dr. Regina Y. Mojica is a board-certified UC Irvine Health family physician who sees patients at our Tustin and Orange medical group offices. Mojica earned her medical degree at the University of Santo Tomas in Manila, Philippines. She completed an internal medicine internship at The Jewish Hospital-Mercy Health in Cincinnati, Ohio. She subsequently completed a residency in family medicine at UC Irvine Medical Center in Orange. Mojica practices adult medicine, focusing on preventive care and health maintenance. She partners with her patients to provide them with compassionate, comprehensive and evidence-based medical care. For an appointment with Mojica, call 714-838-8848.