Holiday Hours

With the exception of Inova hospitals, Inova Emergency Care and Inova-GoHealth Urgent Care, all Inova outpatient offices will be closed for the New Year's Day holiday – Wednesday, Jan. 1.

Some Inova care sites have additional closures for the holidays, which will be noted on the relevant location pages. 

John T. O'Brien, MD

John O'Brien, MD

John O'Brien, MD

John T. O'Brien, MD

Specialty
Cardiovascular Disease, Internal Medicine
Years of Experience
47
Gender
Male
Locations

8081 Innovation Park Dr
700
Fairfax, VA 22031

Phone
Fax
571-472-2901
Inova Cardiology - Annandale

7619 Little River Tpke
1000
Annandale, VA 22003

Phone
Fax
571-472-2901

About John T. O'Brien, MD

Dr. John O’Brien is an interventionally trained, board certified cardiologist at Inova Health System. He joined Inova 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.

Awards/Associations

  • Top Doctors, Washingtonian, 2021, 2023
Medical School
Georgetown University School of Medicine

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.