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Edit this profileAt a glance
- 9961 Sierra Ave, Fontana, CA 92335
About Dr. Oei
Tommy TIONG HIEN Oei, MD practices gastroenterology in Fontana, CA. Tommy is a 1997 graduate of New York University School of Medicine. The provider's National Provider Identifier (NPI) is 1033286844.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (909) 427-3910
- Email not available
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Practice Locations
9961 SIERRA AVE
Fontana, CA 92335
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterologists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 23 related providers in 3 groups
Other gastroenterologists in Fontana 7
Same specialty, same city.
Trained at New York University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1997 at New York University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Oei's specialty?
Dr. Oei is a gastroenterologist in Fontana, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where can I find Dr. Oei?
Dr. Oei is listed at 9961 Sierra Ave, Fontana, CA 92335. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Oei?
The number on file is (909) 427-3910. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Oei's NPI number?
Dr. Oei's National Provider Identifier is 1033286844. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Oei's medical education?
Dr. Oei attended New York University School of Medicine, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Oei been practicing?
Dr. Oei has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
Has Dr. Oei confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Oei. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.