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.
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- Additional Information
- Dr. Ruben Delfino Ustaris MD is a male General Practitioner, has 28 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 General Practitioners and Los Angeles Internists.