Dr. John Joseph O'Brien MD is a male Internist, has 29 years of experience and practices in Gastroenterology.
Dr. John O'Brien has 4 office locations.
SMB Estates
14555 Levan Rd
Ste 407
Livonia, MI 48154

Phone Number
Locations and availability (4)
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).

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Specialties & Research

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

  • He has special expertise in 2 areas:
  • Diabetes
  • Diabetes Complications

Education & Awards

Dr. O'Brien graduated from University of Missouri at Columbia.


Dr. O'Brien has 13 hospital affiliations:

  • St. Mary Mercy Hospital 
  • St. John's Mercy Medical Center 


  • Spanish

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Additional Information
Where does Dr. John J. O'Brien practice?
Dr. John O'Brien practices Gastroenterology near Livonia, MI.
Additional practice locations include: Omaha, NE and O Fallon, MO.
See Livonia Gastroenterologists.