Browse Health
Emergency Physician
36 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. Merl O'Brien:

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Specialties & Research

Dr. Merl O'Brien, MD is board certified in Emergency Medicine.

Education & Awards

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


Dr. O'Brien has 4 hospital affiliations:

  • Sutter General Hospital 
  • Sutter Memorial Hospital 


  • English

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Additional Information
Dr. Merl William O'Brien MD is a male Emergency Medicine Specialist, has 36 years of experience and practices in Emergency Medicine.
Where does Dr. Merl W. O'Brien practice?
Dr. Merl O'Brien has 4 office locations.
Dr. Merl O'Brien practices Emergency Medicine near Carmichael, CA.
Additional practice locations include: Folsom, CA and Roseville, CA.
See Carmichael Emergency Physicians.