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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. John Sullivan:

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Specialties & Research

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

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Additional Information
Dr. John Charles Sullivan MD is a male General Practitioner and practices in General Practice.
Where does Dr. John C. Sullivan practice?
Dr. John Sullivan has 1 office location.
Dr. John Sullivan practices General Practice near Roseville, CA.
See Roseville General Practitioners.