Psychiatrist | Child & Adolescent Psychiatry

Dr. Theresa Toquyen Nguyen, DO

15405 Lansdowne Rd, Tustin, California, 92782

About Dr. Theresa Toquyen Nguyen

Dr. Theresa Toquyen Nguyen is a psychiatrist based in Tustin, California who is specialized in Child & Adolescent Psychiatry. Active license number of Dr. Theresa Toquyen Nguyen is 20A12682 for Child & Adolescent Psychiatry in California. Her current practice location is 15405 Lansdowne Rd, Tustin. Patients can contact her at 925-997-9093. Dr. Theresa Toquyen Nguyen, DO, specializes in Child & Adolescent Psychiatry and her NPI number (Unique professional ID assigned by NPPES) is 1679884928.

Dr. Theresa Toquyen Nguyen has done additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.

Practice Information

Dr. Theresa Toquyen Nguyen's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Dr. Theresa Toquyen Nguyen
Specialization Child & Adolescent Psychiatry
Credentials DO
Gender Female
Practice Address: 15405 Lansdowne Rd,
Tustin, CA - 92782

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number1679884928
NPI Enumeration Date: 01 Jul, 2010
NPI Last Update On: 28 Jun, 2023

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Dr. Theresa Toquyen Nguyen are as mentioned below.

License NumberSpecializationStateStatus
20A12682Child & Adolescent Psychiatry CaliforniaPrimary
007228Child & Adolescent Psychiatry ArizonaSecondary
20A12682Psychiatry CaliforniaSecondary

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Dr. Theresa Toquyen Nguyen
One Hospital Drive, Dc018.00
Columbia, MO - 65202

Book an Appointment with Dr. Theresa Toquyen Nguyen

To schedule an appointment, contact Dr. Theresa Toquyen Nguyen at 15405 Lansdowne Rd, Tustin, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Theresa Toquyen Nguyen:

Dr. Theresa Toquyen Nguyen is a psychiatrist specializing in Child & Adolescent Psychiatry. She has done additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.

Yes, Dr. Theresa Toquyen Nguyen is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Dr. Theresa Toquyen Nguyen practices at 15405 Lansdowne Rd, Tustin, California, 92782.

To schedule an appointment with Dr. Theresa Toquyen Nguyen, please contact the office at 925-997-9093.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.