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John T. O'Brien, MD

John T. O'Brien, MD

Inova Medical Group

Board Certified Specialty: Cardiovascular Disease, Internal Medicine

Accepting new patients for: Cardiovascular Disease

Gender: Male

Languages: English

Physician Group

Inova Medical Group Cardiology

Hospital Affiliations


Dr. John O’Brien is an interventionally trained, board certified cardiologist. He joins Inova Medical Group with over 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.


Medical Education:

  • Georgetown University 1977

Board Certification:

  • Cardiovascular Disease
  • Internal Medicine

Disclosure Statement for Online Physician Referral Service

Thank you for accessing the Inova Physician Referral Service. 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.