> > > > Dr. John O'Brien, MD
Dr. John Sebastian O'Brien MD is a male Internist, has 31 years of experience and practices in Psychiatry, Legal Medicine, and Cardiology.
Dr. John O'Brien has 1 office location.
John S Obrien II, MD
2001 Hamilton St
Apt 1515
Philadelphia, PA 19130

Phone Number
Locations and availability (1)
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. John O'Brien:

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  1. Qualifications
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Patient Reviews

  • Currently 2.5 of 4 stars
Patient comments (2)

The overall average patient rating of Dr. John O'Brien is Good. Dr. O'Brien has been reviewed by 2 patients who have provided 2 comments. The rating is 2.5 out of 4 stars.

Patient Ratings
Accurate Diagnosis 1.0
  • Currently 1 of 4 stars
Bedside Manner 1.0
  • Currently 1 of 4 stars

Specialties & Research

Dr. John O'Brien, MD is board certified in Psychiatry.

  • He has special expertise in 6 areas:
  • Acute Coronary Syndrome (ACS)
  • Depressive Disorder
  • Heart Block
  • High Blood Pressure (Hypertension)
  • High Cholesterol (Hypercholesterolemia)
  • Unstable Angina

Education & Awards

Dr. O'Brien graduated from Thomas Jefferson University, Philadelphia.


Dr. O'Brien has 3 hospital affiliations:

  • Thomas Jefferson University Hospital 
  • Thomas Jefferson University Ho, Philadelphia, Pa 
  • Pennsylvania Hosp, Philadelphia, Pa 

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Additional Information
Where does Dr. John S. O'Brien practice?
Dr. John O'Brien practices Psychiatry, Legal Medicine, and Cardiology near Philadelphia, PA.
See Philadelphia Psychiatrists and Philadelphia Cardiologists.