Physician Profile
Loi V. Tran, DO
Unclaimed ProfileAbout Dr. Tran
Based in Fontana, CA, Loi V. Tran, DO is listed in the NPI registry under internal medicine. NPI 1780744979 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Osteopathic Medical Board of CaliforniaNo. 7326 · Current · expires Aug 31, 2028 · since 1998
Licence standing is from the California Department of Consumer Affairs public licensee file, read on Sep 26, 2026. The board is the record of authority; check it there before relying on it.
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
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 internists at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
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 — 22 related providers in 3 groups
Other internists in Fontana 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1996 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Dr. Tran?
Dr. Tran is an internist in Fontana, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
What is Dr. Tran's address?
Dr. Tran 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 can I make an appointment with Dr. Tran?
The number on file is (909) 427-3910. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Tran?
Dr. Tran's National Provider Identifier is 1780744979. 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
Where did Dr. Tran train?
Dr. Tran attended Other, graduating in 1996. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Tran have?
Dr. Tran has 30 years experience. Calculated from a graduation year of 1996, reported in the CMS National Downloadable File.
CMS public data
Is Dr. Tran's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Tran. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.