4
1 Rating
Summary
Dr. Tommy Oei is a gastroenterologist with expertise in internal medicine who has been practicing for 29 years. He earned his medical degree from New York University School of Medicine, where he built a strong foundation in comprehensive patient care. His extensive experience spans nearly three decades of treating digestive and internal medicine conditions. Dr. Oei speaks English and brings his wealth of knowledge to help patients with complex gastrointestinal concerns.
Dr. Oei practices at Kaiser Foundation Hospital in Fontana, California, where he focuses on diagnosing and treating stomach pain, pregnancy-related abdominal discomfort, and side pain. He performs specialized procedures including upper digestive tract examinations, lower digestive tract evaluations, and colon screenings to help identify and address various health concerns. Patients rate Dr. Oei 4.0 out of 5 stars, reflecting their confidence in his care and expertise in gastroenterology.
Dr. Oei practices at Kaiser Foundation Hospital in Fontana, California, where he focuses on diagnosing and treating stomach pain, pregnancy-related abdominal discomfort, and side pain. He performs specialized procedures including upper digestive tract examinations, lower digestive tract evaluations, and colon screenings to help identify and address various health concerns. Patients rate Dr. Oei 4.0 out of 5 stars, reflecting their confidence in his care and expertise in gastroenterology.
Overview based on verified provider data
Quick Facts
- 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
Compare with Similar Doctors
 |  |  |  |
| Dr. Tommy Tiong-Hien Oei, MD | Rebecca Humphries, APRN | Rachel Oliver, APRN | Chimdi Mfebe, APRN |
| Gastroenterology | Gastroenterology | Gastroenterology | Gastroenterology |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 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 , CA | Sacramento , CA | Sacramento , CA | Little Rock , AR |
| Med School: New York University School Of Medicine | Med School: Emory University | Med School: University of South Alabama | Med School: Chamberlain University College of Nursing |
Current Profile | View Profile | View Profile | View Profile |
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
Certifications, License, & Education
29 Years Experience
Dr. Tommy Tiong-Hien Oei holds an active medical license in the state of California.
Medical License
Medical Doctor with an active 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
- How can I make an appointment with Dr. Tommy Oei?
- You can find contact information for Dr. Tommy Oei here on Vitals.
- What languages does Dr. Tommy Oei speak?
- Dr. Tommy Oei speaks English.
- Where is Dr. Tommy Oei's office located?
- Dr. Tommy Oei's office is located at 9961 Sierra Ave, Fontana, CA, 92335.
- Which hospitals is Dr. Tommy Oei affiliated with?
- Dr. Tommy Oei is affiliated with Kaiser Foundation Hospital.
- Does Dr. Tommy Oei accept my insurance?
- You can see the insurance plans that Dr. Tommy Oei accepts on their Vitals profile.
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