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8110 Gatehouse Road, Falls Church, VA 22042


John T O'Brien, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
John O'Brien, MD


Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Cardiovascular Disease, Internal Medicine

Years of Experience





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About John O'Brien, MD

Dr. John O’Brien is an interventionally trained, board certified cardiologist. He joined Inova Medical Group with more than 36 years of clinical experience.

For the past 30 years, he has been in private practice in Northern Virginia, practicing all aspects of adult cardiology. During his training, Dr. O’Brien realized that he wanted to be a part of the rapidly evolving movement taking place in the field of cardiology. The continued refinement of these various theories and procedures has helped improve the quality of his patients' lives.

A native of Falls Church, VA, Dr. O’Brien currently resides in Oakton, VA. He enjoys pursuing his interests which include cycling, organic gardening, and basketball.


  • Top Doctors, Washingtonian, 2021


Medical Education

Georgetown University School of Medicine 1977

Board Certification

Cardiovascular Disease, Internal Medicine

Hospital Affiliation

Patient Reviews

About Patient Comments

The Patient Rating score is an average of all responses to physician related questions on our nationally-recognized Press Ganey Patient Satisfaction Survey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are gathered from our Press Ganey Patient Satisfaction Survey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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Inova Physician Referral Services

Please make note of the following information.

This referral service is sponsored by Inova. Only physicians with appropriate medical staff privileges at an Inova affiliated hospital may participate. There is no charge or fee to you or for the participating physician for our service. Physician participation is voluntary.

Physician referrals will be based on your referral needs and preferences of location, specialty, and rotation availability of the physician.

The physicians on our referral panel are independent practitioners or physician employees. The independent practitioners are not employees, agents or representatives of Inova and are solely responsible for their provision of medical care to you.