Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Ythanh Nguyen MD Inc

Organization Internal Medicine Physician · NPI 1164965018

Ythanh Nguyen MD Inc is an Internal Medicine Physician in Upland, California. Works from 2 locations. Licensed in California.

Licensed in
CA
In the registry since
2016
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

999 San Bernardino Rd
Upland, CA 91786-4920
Phone: (909) 985-2811
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 8235 Rochester Ave, Rancho Cucamonga, CA 91730-0718 — (909) 484-4900

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A84989 (CA)

Record details

NPI number1164965018
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Ythanh Nguyen — President · (909) 239-6109
NPI enumeratedNovember 27, 2016
Last updated in NPPESFebruary 1, 2026
Certification dateFebruary 1, 2026
Mailing address154-A W. Foothill Blvd. Box 354, Upland, CA 91786

Other providers in Upland