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

Dr. Theresa Toquyen Nguyen, DO

Individual provider Child & Adolescent Psychiatry Physician · NPI 1679884928

Dr. Theresa Toquyen Nguyen, DO is a Psychiatry in Tustin, California. Qualified in 2010, 16 years ago. Practices with Community Intervention Associates Inc, a 9-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Arizona and California.

Years since qualifying
16
Licensed in
AZ, CA
In the registry since
2010
Specialties on file
3
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

15405 Lansdowne Rd
Tustin, CA 92782
Phone: (925) 997-9093
Show map & directions

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

Additional practice locations (1)

  • 2851 S Avenue B Ste 2901, Yuma, AZ 85364-7756 — (928) 376-0026

Specialties & licences

Child & Adolescent Psychiatry Physician (primary) Taxonomy 2084P0804X · Licence 20A12682 (CA)
Child & Adolescent Psychiatry Physician Taxonomy 2084P0804X · Licence 007228 (AZ)
Psychiatry Physician Taxonomy 2084P0800X · Licence 20A12682 (CA)

Record details

NPI number1679884928
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 1, 2010
Last updated in NPPESJune 28, 2023
Certification dateJune 28, 2023

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Group practice Community Intervention Associates Inc. — 9 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare