John J. Hollowed, MD

John J. Hollowed, MD

Primary Location
Simi Valley Alamo Specialty Care
2755 Alamo Street
Suite 100
Simi Valley, California 93065


Dr. Hollowed is an interventional cardiologist at the UCLA Health Simi Valley Alamo Specialty Care clinic. He specializes in the management of coronary artery disease through coronary interventions and preventive medicine. He is committed to providing comprehensive cardiovascular care to his patients.

Dr. Hollowed is originally from Seattle. He earned his medical degree from Creighton University and completed his internship and residency in Internal Medicine at Olive View-UCLA Medical Center. He then pursued fellowship in Cardiovascular Medicine at UCLA and completed his Interventional Cardiology Fellowship at UCLA. He earlier earned his bachelor’s degree at Carleton College and received his Master of Science in Medical Sciences from Drexel University.

Dr. Hollowed is a Clinical Instructor of Medicine at UCLA. His research focuses on coronary interventions and cardiogenic shock. He has taken part in translational research bringing knowledge from the animal lab to clinical practice. Dr. Hollowed is certified by the American Board of Internal Medicine, the Subspecialty Board of Cardiovascular Disease, and the Board of Nuclear Cardiology.

Dr. Hollowed has a passion for sports. He was a pitcher on the college baseball team and the quarterback on the football team at Carleton College, and he loves to ski and hike with his family. He is also a music lover who enjoys the Los Angeles music scene.


Medical Board Certifications

Interventional Cardiology, American Board of Internal Medicine, 2020
Internal Medicine, American Board of Internal Medicine, 2017


UCLA School of Medicine, 2021
UCLA School of Medicine, 2020


Olive View-UCLA Medical Center Internal Medicine GME, 2017


Creighton University School of Medicine, MD, 2014