Ryan J. Williams, MD

Ryan J. Williams, MD

Pediatric Cardiology
Accepting new patients
Primary Location
Children's Heart Center
200 Medical Plaza
Suite 330
Los Angeles, California 90095


Ryan Williams, MD is a pediatric cardiologist at the UCLA Mattel Children’s Hospital. His clinical interests include pediatric heart failure, heart transplantation, and mechanical circulatory support. He also has a special interest in caring for children with single ventricle congenital heart disease and those with pulmonary hypertension. In his role at UCLA, he also attends on the inpatient general cardiology service and sees children with all forms of heart disease in his outpatient clinic.

Dr. Williams earned his medical degree from the David Geffen School of Medicine at UCLA. He completed residency training in pediatrics at the Children’s Hospital of Philadelphia (CHOP), followed by fellowship training in pediatric cardiology at Boston Children’s Hospital, where he served as Chief Fellow. He subsequently completed a senior fellowship in pediatric heart failure, heart transplantation, and mechanical circulatory support at Boston Children’s Hospital. While in Boston, Dr. Williams’ research was funded by an institutional training grant from the National Institutes of Health (T32), and he was awarded the Kane/Owens Award for Compassionate Care.

Dr. Williams is board certified in Pediatrics and Pediatric Cardiology by the American Board of Pediatrics, and is a member of the International Society of Heart & Lung Transplantation. He is also an active member of the Pediatric Heart Transplant Society (PHTS) and the Advanced Cardiac Therapies Improving Outcomes Network (ACTION). His research focuses on clinical management and outcomes for children with heart failure and following heart transplantation. He has authored or co-authored over 20 publications and has presented his research at annual meetings of the International Society of Heart & Lung Transplantation (ISHLT) as well as the American Transplant Congress (ATC).




Medical Board Certifications

Pediatric Cardiology, American Board of Pediatrics, 2020
Pediatrics, American Board of Pediatrics, 2017


Boston Children's Hospital, Harvard Medical School, 2021
Boston Children's Hospital, Harvard Medical School, 2020


Children's Hospital of Philadelphia, 2017


UCLA School of Medicine, MD, 2014


Hospital Affiliations

Ronald Reagan UCLA Medical Center

UCLA Santa Monica Medical Center