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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. Diane Sun:

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Specialties & Research

Dr. Diane Sun, MD is board certified in Internal Medicine.

Education & Awards

Dr. Sun graduated from Washington University at St. Louis, Saint Louis.


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Additional Information
Dr. Diane Ruolin Sun MD is a female Internist, has 9 years of experience and practices in Internal Medicine.
Where does Dr. Diane R. Sun practice?
Dr. Diane Sun has 1 office location.
Dr. Diane Sun practices Internal Medicine near Hayward, CA.
See Hayward Internists.