Dr. William John O'Brien MD is a male Family Practitioner, has 36 years of experience and practices in Family Medicine, General Practice, and Internal Medicine.
Dr. William O'Brien has 7 office locations.
17219 E Alta Loma
Fountain Hills, AZ 85268

Phone Number
Locations and availability (7)
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. William O'Brien, MD is board certified in Family Medicine.

  • He has special expertise in 1 area:
  • Flu (Human Influenza)

Education & Awards

Dr. O'Brien graduated from University of Minnesota, Twin Cities, Minneapolis.


Accepted Insurance Plans

Dr. O'Brien accepts these health insurances in at least one office:

  • Health Choice Arizona - 1 plan
  • United Health Group, Inc. - Americhoice - 2 plans
  • Humana - 6 plans

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Additional Information
Where does Dr. William J. O'Brien practice?
Dr. William O'Brien practices Family Medicine, General Practice, and Internal Medicine near Fountain Hills, AZ.
Additional practice locations include: Phoenix, AZ and Gilbert, AZ.
See Fountain Hills Family Physicians, Fountain Hills General Practitioners, and Fountain Hills Internists.