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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 Ma:

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Specialties & Research

Dr. James Ma, MD is board certified in Gastroenterology.

  • He has special expertise in 5 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Ma graduated from Virginia Commonwealth University, Richmond.


Dr. Ma has 1 hospital affiliations:

  • Saddleback Memorial Medical Center-Laguna Hills 

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Additional Information
Dr. James Sung June Ma MD is a male Internist, has 21 years of experience and practices in Gastroenterology.
Where does Dr. James S. Ma practice?
Dr. James Ma has 1 office location.
Dr. James Ma practices Gastroenterology near Riverside, CA.
See Riverside Gastroenterologists.