Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

STEVEN MAU NGUYEN MD
NPI 1942984299
Psychiatry & Neurology - Psychiatry in Torrance, CA

Active since June 14, 2023
21810 NORMANDIE AVE, TORRANCE, CA 90502(424) 492-3300 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jul 13, 2026, Jul 1, 2024, Jun 14, 2023 (3 updates tracked since 2023).

  • Individual
  • Male
  • Psychiatry & Neurology
  • Psychiatry

About STEVEN NGUYEN

This page provides the complete NPI Profile along with additional information for Steven Nguyen, a provider established in Torrance, California with a medical specialization in Psychiatry & Neurology, focusing in psychiatry . The healthcare provider is registered in the NPI registry with number 1942984299 assigned on June 2023. The practitioner's primary taxonomy code is 2084P0800X with license number 201955 (CA). The provider is registered as an individual and his NPI record was last updated July 2026.

NPI
1942984299
Provider Name
STEVEN MAU NGUYEN MD
Gender
Male
Entity Type
Individual
Location Address
21810 NORMANDIE AVE TORRANCE, CA 90502
Location Phone
(424) 492-3300
Mailing Address
21810 NORMANDIE AVE TORRANCE, CA 90502
Mailing Phone
(424) 492-3300
Is Sole Proprietor?
No
Enumeration Date
06-14-2023
Last Update Date
07-13-2026
Code Navigator

A psychiatrist like Steven Nguyen are primary mental health physicians diagnose and treat mental illnesses through psychotherapy, psychoanalysis, hospitalization and medication. Psychiatrist help patients find solutions through changes in their behavioral patterns, explorations of experiences, group and family therapy.

Location Map

Secondary Locations

  • 26520 Cactus Ave
    Moreno Valley, CA 92555
    (951) 486-4000

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Psychiatry & Neurology Psychiatry

Taxonomy Code
2084P0800X
Type
Allopathic & Osteopathic Physicians
License No.
201955
License State
CA
Taxonomy Description
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Reviews for STEVEN MAU NGUYEN MD

There are currently no reviews for this provider. Be the first person to share your experience with this provider by filling out our review form. Your insights are appreciated and will help others make informed decisions.

NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1942984299, we treat the final digit (9) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 81. The final step is to find the difference between that total and the next multiple of ten (90 - 81 = 9).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
9
Unchanged
Pos 3
4
Doubled → 8
Pos 4
2
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
8
Unchanged
Pos 7
4
Doubled → 8
Pos 8
2
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
9
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 4 → 8 9 → 18 → 9 4 → 8 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 9 + 8 + 2 + 1 + 8 + 8 + 8 + 2 + 1 + 8 + 24 = 81

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 81 is 90. The difference is the calculated check digit.

90 - 81 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1942984299.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Psychologist (Clinical)
21810 NORMANDIE AVE
TORRANCE, CA 90502
Marriage & Family Therapist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Counselor (Mental Health)
21810 NORMANDIE AVE
TORRANCE, CA 90502
Psychologist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Marriage & Family Therapist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Psychologist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Social Worker (Clinical)
21810 NORMANDIE AVE
TORRANCE, CA 90502
Psychologist (Clinical)
21810 NORMANDIE AVE
TORRANCE, CA 90502
Marriage & Family Therapist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Counselor (Mental Health)
21810 NORMANDIE AVE
TORRANCE, CA 90502
Rehabilitation Practitioner
21810 NORMANDIE AVE
TORRANCE, CA 90502
Psychologist (Clinical)
21810 NORMANDIE AVE
TORRANCE, CA 90502
Marriage & Family Therapist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Marriage & Family Therapist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Rehabilitation Counselor (Assistive Technology Practitioner)
21810 NORMANDIE AVE
TORRANCE, CA 90502
Marriage & Family Therapist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Marriage & Family Therapist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Psychologist (Clinical)
21810 NORMANDIE AVE
TORRANCE, CA 90502
Marriage & Family Therapist
21810 NORMANDIE AVE
TORRANCE, CA 90502
Marriage & Family Therapist
21810 NORMANDIE AVE
TORRANCE, CA 90502

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1942984299, enumerated as an "individual" on June 14, 2023.

The provider is located at 21810 NORMANDIE AVE TORRANCE, CA 90502 and the phone number is (424) 492-3300.

Psychiatry & Neurology with taxonomy code 2084P0800X and a focus in Psychiatry.