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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).

Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. Maria O'Brien is Excellent. Dr. O'Brien has been reviewed by 3 patients who have provided 2 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.2
Promptness 2.8
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. Maria O'Brien, MD is board certified in Family Medicine.

  • She has special expertise in 1 area:
  • Women's Health

Education & Awards

Dr. O'Brien graduated from Universitatea De Medicina Si Farmacie Carol Davila, Bucharest.


Dr. O'Brien has 4 hospital affiliations:

  • Middlesex Hospital 
  • Bristol Hospital 


  • Greek
  • Italian
  • French
  • Romanian
  • English

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Additional Information
Dr. Maria R O'Brien MD is a female Family Practitioner, has 27 years of experience and practices in Family Medicine.
Where does Dr. Maria R. O'Brien practice?
Dr. Maria O'Brien has 9 office locations.
Dr. Maria O'Brien practices Family Medicine near Bristol, CT.
Additional practice locations include: Meriden, CT and Moodus, CT.
See Bristol Primary Care Doctors.