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

Ai (Theresa) Diem Nguyen, OD

Individual provider Optometrist · NPI 1508857533

Ai (Theresa) Diem Nguyen, OD is an Optometry in San Diego, California. Graduated from Pennsylvania College of Optometry in 2000, 26 years ago. Practices with California Eye Clinic, a 9-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
26
Trained at
Pennsylvania College of Optometry
Licensed in
CA
In the registry since
2005
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

6945 El Cajon Blvd
San Diego, CA 92115-1754
Phone: (619) 697-4600
Fax: (619) 464-5526
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence OPT11481 (CA)

Record details

NPI number1508857533
Entity typeIndividual (Type 1)
GenderFemale
Credentials OD
Sole proprietorNo
NPI enumeratedOctober 31, 2005
Last updated in NPPESFebruary 28, 2013

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolPENNSYLVANIA COLLEGE OF OPTOMETRY
Graduated 2000 (26 years in practice)
Group practice California Eye Clinic — 9 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in San Diego