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  • Dr. John Massaro, DO is a board certified internist in San Luis Obispo, California. He is currently licensed to practice medicine in California, South Carolina, and Florida. He is affiliated with French Hospital Medical Center, Arroyo Grande Community Hospital, and Twin Cities Community Hospital.

Education & Training

  • Nassau University Medical Center
    Nassau University Medical CenterResidency, Internal Medicine, 1998 - 2000
  • Nassau University Medical Center
    Nassau University Medical CenterInternship, Transitional Year, 1997 - 1998
  • NYIT College Of Osteopathic Medicine
    NYIT College Of Osteopathic MedicineClass of 1997

Certifications & Licensure

  • CA State Medical License
    CA State License 2001 - 2025
  • FL State Medical License
    FL State License 2000 - 2004
  • NY State Medical License
    NY State License 2000 - 2004
  • SC State Medical License
    SC State License 2001 - 2002
  • American Board of Internal Medicine Internal Medicine

Professional Memberships

Hospital Affiliations