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

Theresa Thanh Ngoc Nguyen, MD, Inc

Organization Internal Medicine Physician · NPI 1750667192

Theresa Thanh Ngoc Nguyen, MD, Inc is an Internal Medicine Physician in Santa Ana, California. Licensed in California. Registered with an NPI since 2011.

Licensed in
CA
In the registry since
2011
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

5030 Westminster Ave
Santa Ana, CA 92703-1151
Phone: (714) 775-8090
Fax: (657) 251-0494
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A61129 (CA)

Record details

NPI number1750667192
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Theresa Thanh Nguyen — Physician In Charge · (714) 775-8090
NPI enumeratedOctober 31, 2011
Last updated in NPPESJuly 20, 2026
Certification dateJuly 20, 2026
Mailing address5030 Westminster Ave, Santa Ana, CA 92703-1151

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