John J. Hollowed, MD
Accepting new patients

John J. Hollowed, MD

  • Cardiology
Average rating: 4.9
| 159 ratings
Santa Monica Cardiology | 2020 Santa Monica Boulevard, Suite 220, Santa Monica, CA 90404


Dr. Hollowed is an interventional cardiologist at the UCLA Santa Monica Cardiology 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 Interventional Cardiology, 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, 2021
Cardiovascular Disease, American Board of Internal Medicine, 2020
Internal Medicine, American Board of Internal Medicine, 2017


Interventional Cardiology, UCLA School of Medicine, 2021
Cardiovascular Disease, UCLA School of Medicine, 2020


Internal Medicine, Olive View-UCLA Medical Center Internal Medicine GME, 2017


MD, Creighton University School of Medicine, 2014


  • Olive View-UCLA Dr. Gan Award for Excellence in Internal Medicine 

Hospital Affiliations

Ronald Reagan UCLA Medical Center

UCLA Santa Monica Medical Center



  1. Becker, PS, Chien, S, Wilks, AN, Hollowed, J. Inhibition of alpha(v)beta(3) integrin disrupts adhesion and enhances chemotherapy effect in multiple myeloma cells [abstract]. BLOOD. 2007; 110(11): 275B-275B
  2. Hollowed J, McCullough M, Sanchez D, Traina M, Hernandez S, Murillo E. Rapidly Progressing Chagas Cardiomyopathy. American Journal of Tropical Medicine and Hygiene. 2016;94(4):894-896. doi:10.4269/ajtmh.15-0616.
  3. Lee MS, Srivastava PK, Al Yaseen S, Heikali D, Hollowed J, Mahmud E. Acute Procedural Outcomes of Orbital Atherectomy for the Treatment of Profunda Femoris Artery Disease: Subanalysis of the CONFIRM Registries. J Invasive Cardiol. December 2017.
  4. Lee MS, Martinsen BJ, Hollowed J, et al. Acute procedural outcomes of orbital atherectomy for the treatment of iliac artery disease: Sub-analysis of the CONFIRM registries. Cardiovasc Revasc Med. October 2017.
  5. Lee MS, Shlofmitz E, Nayeri A, Hollowed J, Kong J, Shlofmitz RA. Comparison of Heparin and Bivalirudin in Patients Undergoing Orbital Atherectomy. J Invasive Cardiol. 2017;29(11):397-400.
  6. Lee MS, Shlofmitz E, Nayeri A, Hollowed J, Shlofmitz RA. Outcomes of Patients With a History of Coronary Artery Bypass Grafting Who Underwent Orbital Atherectomy for Severe Coronary Artery Calcification. J Invasive Cardiol. 2017;29(10):359-362.
  7. Lee MS, Shlofmitz E, Lluri G, Park KW, Hollowed J, Shlofmitz R. One-Year Outcomes of Orbital Atherectomy of Long, Diffusely Calcified Coronary Artery Lesions. J Invasive Cardiol. 2018;30(6):230-233.
  8. Hollowed J, Nsair A. Influenza A (H3N2) induced fulminant myocarditis requiring mechanical circulatory support. J Am Coll Cardiol Case Rep 2019;1:133–7.
  9. Hollowed, J., Assadi, R., and Sohrabian, S. 2019. Hidden inflammation: Severe post-inflammatory aortic regurgitation due to leaflet prolapse. Proceedings of UCLA Health 23.
  10. Hollowed, J., Colbert, C., Currier, J., and Nguyen, K.-l. 2020. Novel purcutaneous approach for deployment of 3D printed coronary implants in swine models of ischemic heart disease. Journal of Visualized Experiments 156(e60729).

See all publications (PDF)


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  • Health Net of California
  • Interplan (part of HealthSmart)
  • L.A. Care
  • MultiPlan
  • UFCM Health System
  • Prime Health Services
  • Private Healthcare Systems (PHCS)
  • UnitedHealthcare

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  • Olive View-UCLA Dr. Gan Award for Excellence in Internal Medicine