UCI Health will see you now: Welcome to our new co-workers and patients from Fountain Valley, Lakewood, Los Alamitos and Placentia Linda! 

Ronald J. Rivera, MD


Emergency Medicine

MyChart patient portal offers a convenient and secure way to manage your healthcare online. Use MyChart to schedule appointments, request prescription renewals, send messages to your care team and more.
Medical Services
  • American Board of Emergency Medicine, Emergency Medicine
  • English
Medical School
David Geffen School of Medicine at UCLA
SUNY Downstate Medical CenterEmergency Medicine
UCI Dept of Medicine - Graduate Medical EducationMultimedia Design EdTech
Professional Positions
  • Assistant Professor — Department of Emergency Medicine, UCI School of Medicine
More Information

Dr. Ronald J. Rivera is a board-certified UCI Health physician who specializes in emergency medical care. 

He earned his medical degree at the David Geffen School of Medicine at UCLA in Los Angeles, followed by a residency in emergency medicine at SUNY Downstate Medical Center in Brooklyn, N.Y. He also completed fellowship training in multimedia design and educational technology at the UCI School of Medicine.

His academic focus is on the social determinants of health, community outreach, harm reduction strategies, gender-affirming care and healthcare equity. He is currently developing one of the first teaching programs for medical students on care for LGBTQ+ patients as well as empathy training when working with at-risk patient populations.

Rivera, who also speaks Spanish, sees patients in Orange


UCI Medical Center
101 The City Drive South
Orange, CA 92868