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Primary Care Doctor, General Practitioner, Internist
29 years of experience
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. Ruben Ustaris:

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Specialties & Research

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

Education & Awards

Dr. Ustaris graduated from Dr. Francisco Q. Duque Medical Foundation, Dagupan.


  • Tagalog

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Additional Information
Dr. Ruben Delfino Ustaris MD is a male General Practitioner, has 29 years of experience and practices in General Practice and Internal Medicine.
Where does Dr. Ruben D. Ustaris practice?
Dr. Ruben Ustaris has 1 office location.
Dr. Ruben Ustaris practices General Practice and Internal Medicine near Los Angeles, CA.
See Los Angeles Primary Care Doctors and Los Angeles Internists.