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

STEPHANIE MA
NPI 1437899291
Psychiatry & Neurology - Psychiatry in San Diego, CA

Active since March 30, 2022
7850 VISTA HILL AVE, SAN DIEGO, CA 92123(858) 836-8434 Get Directions Write a Review

NPPES record last updated: July 8, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

  • Individual
  • Female
  • Psychiatry & Neurology
  • Psychiatry

About STEPHANIE MA

This page provides the complete NPI Profile along with additional information for Stephanie Ma, a provider established in San Diego, California with a medical specialization in Psychiatry & Neurology, focusing in psychiatry . The healthcare provider is registered in the NPI registry with number 1437899291 assigned on March 2022. The practitioner's primary taxonomy code is 2084P0800X with license number A190909 (CA). The provider is registered as an individual and her NPI record was last updated July 2026.

NPI
1437899291
Provider Name
STEPHANIE MA
Gender
Female
Entity Type
Individual
Location Address
7850 VISTA HILL AVE SAN DIEGO, CA 92123
Location Phone
(858) 836-8434
Mailing Address
5694 MISSION CENTER RD STE 602 SAN DIEGO, CA 92108
Mailing Phone
(619) 298-8213
Is Sole Proprietor?
Yes
Enumeration Date
03-30-2022
Last Update Date
07-08-2026
Code Navigator

A psychiatrist like Stephanie Ma 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

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.
A190909
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.

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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 1437899291, we treat the final digit (1) 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 79. The final step is to find the difference between that total and the next multiple of ten (80 - 79 = 1).

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
4
Unchanged
Pos 3
3
Doubled → 6
Pos 4
7
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
9
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
2
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
1
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 3 → 6 8 → 16 → 7 9 → 18 → 9 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 6 + 7 + 1 + 6 + 9 + 1 + 8 + 2 + 1 + 8 + 24 = 79

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

The next multiple of ten after 79 is 80. The difference is the calculated check digit.

80 - 79 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1437899291.

Other Providers at the Same Location


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

Clinical Neuropsychologist
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Recreation Therapist
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatry & Neurology (Psychiatry)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Social Worker
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatry & Neurology (Psychiatry)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Counselor (Mental Health)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychologist
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Pharmacist
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatry & Neurology (Psychiatry)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatric Hospital
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychologist
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatry & Neurology (Psychiatry)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatry & Neurology (Psychiatry)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatry & Neurology (Child & Adolescent Psychiatry)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatry & Neurology (Psychiatry)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatry & Neurology (Psychiatry)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Emergency Medicine
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Psychiatric Hospital
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Social Worker (Clinical)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123
Pharmacist (Psychiatric)
7850 VISTA HILL AVE
SAN DIEGO, CA 92123

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1437899291, enumerated as an "individual" on March 30, 2022.

The provider is located at 7850 VISTA HILL AVE SAN DIEGO, CA 92123 and the phone number is (858) 836-8434.

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