Summary

Dr. Tommy Oei treats abdominal pain, abdominal pain in pregnancy, and flank pain, and performs upper GI endoscopy, lower GI endoscopy, and colonoscopy. He practices gastroenterology and internal medicine and has 29 years of experience.

Dr. Oei earned his medical degree from New York University School of Medicine and is affiliated with Kaiser Foundation Hospital in Fontana, California. Patients on Vitals rate Dr. Oei 4 out of 5.

Overview based on verified provider data

Quick Facts

  • 4
  • 29 years of experience
  • speaks English
  • New York University School Of Medicine
  • 2 specialties
  • 11 areas of expertise
  • 1 hospital affiliation
  • 1 office location
  • Male

Office Location

Kaiser Foundation Hospital

9961 Sierra AveFontana, CA 92335

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Dr. Tommy Tiong-Hien Oei, MDAshley Anderson, APRNJi Soo Choi, APRNRebecca Humphries, APRN
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients
4 
0 
0 
0 
29 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English Speaks English Speaks English Speaks English
Fontana , CASacramento , CASacramento , CASacramento , CA
Med School: New York University School Of Medicine Med School: East Tennessee State University - Quillen College of Medicine Med School: New York University Med School: Emory University
Current Profile
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Insurance Plans Accepted by Dr. Tommy Tiong-Hien Oei

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Tommy Tiong-Hien Oei has the following 2 specialties

Specialty Expertise

Dr. Tommy Tiong-Hien Oei has the following 11 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Hemorrhoids
  • Hepatitis C
  • Internal Medicine
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

29 Years Experience

Dr. Tommy Tiong-Hien Oei holds an expired medical license in the state of California.

Medical License

Medical Doctor with an expired medical license in the state of California that expired in 2026.

Education & Training

Medical School

Graduated from New York University School Of Medicine in 1997.

NPI Number

Dr. Oei's NPI number is 1033286844.

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Frequently Asked Questions

Which hospitals is Dr. Tommy Oei affiliated with?
Dr. Tommy Oei is affiliated with Kaiser Foundation Hospital.
Where is Dr. Tommy Oei's office located?
Dr. Tommy Oei's office is located at 9961 Sierra Ave, Fontana, CA, 92335.
How can I make an appointment with Dr. Tommy Oei?
You can find contact information for Dr. Tommy Oei here on Vitals.
Does Dr. Tommy Oei accept my insurance?
You can see the insurance plans that Dr. Tommy Oei accepts on their Vitals profile.
Does Dr. Tommy Oei accept virtual/telehealth appointments?
Dr. Tommy Oei has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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