Browse Health
Family Practitioner, Primary Care Doctor
29 years of experience
Accepting new patients
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
  2. What's important to you

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Patient Reviews

Patient comments (5)

The overall average patient rating of Dr. John O'Brien is Excellent. Dr. O'Brien has been reviewed by 19 patients who have provided 5 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.9
Promptness 5.0
Courteous Staff 4.6
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

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

  • He has special expertise in 1 area:
  • Weight Loss

Education & Awards

Dr. O'Brien graduated from University of Missouri at Columbia. He has 4 awards.

Patients' Choice Award (2012, 2014)
Compassionate Doctor Recognition (2014)
NCQA Diabetes Physician Recognition Program (2014 - 2017)
On-Time Doctor Award (2014)


Dr. O'Brien has 3 hospital affiliations:

  • St Lukes Hospital 
  • St. John's Mercy Medical Center 
  • St. Luke`s Hospital 

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Additional Information
Dr. John J O'Brien MD is a male Family Practitioner, has 29 years of experience and practices in Family Medicine.
Where does Dr. John J. O'Brien practice?
Dr. John O'Brien has 1 office location.
Dr. John O'Brien practices Family Medicine near O Fallon, MO.
See O Fallon Family Physicians.