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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. James Chang:

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Specialties & Research

Dr. James Chang, MD is board certified in Internal Medicine.

Education & Awards

Dr. Chang graduated from New York University - Mount Sinai.


Dr. Chang has 5 hospital affiliations:

  • Sequoia Hospital 
  • Regional Medical Center of San Jose 


  • Chinese
  • Mandarin

> > > > Dr. James Chang, MD

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Additional Information
Dr. James S Chang MD is a male Internist, has 9 years of experience and practices in Internal Medicine.
Where does Dr. James S. Chang practice?
Dr. James Chang has 1 office location.
Dr. James Chang practices Internal Medicine near Vallejo, CA.
See Vallejo Internists.