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).
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The overall average patient rating of Dr. John O'Brien is Excellent.
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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.
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.