CINDY JOHN PH.D.
NPI 1598960148
Psychologist - Clinical Child & Adolescent in Mission Viejo, CA

NPI Status: Active since June 15, 2007

Contact Information

27281 LAS RAMBLAS STE 200
MISSION VIEJO, CA
ZIP 92691
Phone: (714) 202-7275

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Psychologist
Clinical Child & Adolescent

About CINDY JOHN

This page provides the complete NPI Profile along with additional information for Cindy John, a provider established in Mission Viejo, California with a medical specialization in Psychologist, focusing in clinical child & adolescent . The healthcare provider is registered in the NPI registry with number 1598960148 assigned on June 2007. The practitioner's primary taxonomy code is 103TC2200X with license number PSY25091 (CA). The provider is registered as an individual and her NPI record was last updated March 2026.

NPI: 1598960148
Provider Name: CINDY JOHN PH.D.
Gender: Female
Entity Type: Individual
Location Address: 27281 LAS RAMBLAS STE 200 MISSION VIEJO, CA 92691
Location Phone: (714) 202-7275
Mailing Address: 2123 S EL CAMINO REAL STE A OCEANSIDE, CA 92054
Mailing Phone: (909) 528-1040
Is Sole Proprietor?: Yes
Enumeration Date: 06-15-2007
Last Update Date: 03-13-2026
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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: Psychologist Clinical Child & Adolescent
Taxonomy Code: 103TC2200X
Type: Behavioral Health & Social Service Providers
License No.: PSY25091
License State: CA
Taxonomy Description: A psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents within their social context. Of particular importance to the specialty of clinical child psychology is an understanding of the basic psychological needs of children and adolescents, and how the family and other social contexts influence the socio-emotional adjustment, cognitive development, behavioral adaptation and health status of children and adolescents.

NPI 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 1598960148, we treat the final digit (8) 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 72. The final step is to find the difference between that total and the next multiple of ten (80 - 72 = 8).

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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 8

Check

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 9 → 18 → 9 9 → 18 → 9 0 → 0 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 1 + 8 + 8 + 1 + 8 + 6 + 0 + 1 + 8 + 24 = 72

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

The next multiple of ten after 72 is 80. The difference is the calculated check digit.

80 - 72 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1598960148.