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. Mark O'Brien:
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The overall average patient rating of Dr. Mark O'Brien is Excellent.
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Specialties & Research
Dr. Mark O'Brien, DO is board certified in Family Medicine.
Education & Awards
Dr. O'Brien graduated from Des Moines University. He has 2 awards.
Dr. O'Brien has 1 hospital affiliations:
- St. John River District Hospital
Similar doctors nearby
- Additional Information
- Dr. Mark Thomas O'Brien DO is a male Family Practitioner, has 25 years of experience and practices in Family Medicine.
- Where does Dr. Mark T. O'Brien practice?
- Dr. Mark O'Brien has 2 office locations.
Dr. Mark O'Brien practices Family Medicine near East China, MI.
Additional practice locations include: Algonac, MI.
See East China Primary Care Doctors.