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Internist, Gastroenterologist (digestive)
10 years of experience
Accepting new patients
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. Eugene Yoon:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. Eugene Yoon is Good. Dr. Yoon has been reviewed by 8 patients who have provided 3 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 3.7
Promptness 3.3
Courteous Staff 4.7
Accurate Diagnosis 3.7
Bedside Manner 3.3
Spends Time with Me 3.0
Follows Up After Visit 3.0

Specialties & Research

Dr. Eugene Yoon, MD is board certified in Internal Medicine and 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. Yoon graduated from University of Virginia, Charlottesville.


Dr. Yoon has 3 hospital affiliations:

  • St. Jude Medical Center 
  • Placentia-Linda Hospital 
  • ST Joseph Hospital 


  • Spanish

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Additional Information
Dr. Eugene Jay Yoon MD is a male Internist, has 10 years of experience and practices in Internal Medicine and Gastroenterology.
Where does Dr. Eugene J. Yoon practice?
Dr. Eugene Yoon has 1 office location.
Dr. Eugene Yoon practices Internal Medicine and Gastroenterology near Fullerton, CA.
See Fullerton Internists and Fullerton Gastroenterologists.