CRYSTAL MARIE ZIRAK B.A.
NPI 1679740021
Social Worker - School in Gardena, CA

NPI Status: Active since May 14, 2008

Contact Information

130 W VICTORIA ST
GARDENA, CA
ZIP 90248
Phone: (310) 715-2020

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

Individual
Female
Social Worker
School

About CRYSTAL ZIRAK

This page provides the complete NPI Profile along with additional information for Crystal Zirak, a provider established in Gardena, California with a medical specialization in Social Worker, focusing in school . The healthcare provider is registered in the NPI registry with number 1679740021 assigned on May 2008. The practitioner's primary taxonomy code is 1041S0200X. The provider is registered as an individual and her NPI record was last updated 18 years ago.

NPI: 1679740021
Provider Name: CRYSTAL MARIE ZIRAK B.A.
Gender: Female
Entity Type: Individual
Location Address: 130 W VICTORIA ST GARDENA, CA 90248
Location Phone: (310) 715-2020
Mailing Address: 1332 E POPPY ST LONG BEACH, CA 90805
Mailing Phone: (562) 537-6181
Is Sole Proprietor?: No
Enumeration Date: 05-14-2008
Last Update Date: 05-14-2008
Code Navigator

A school social worker like Crystal Zirak works with teachers, parents, and school administrators to develop plans and strategies to improve students' academic performance and social development. Students are referred to school social workers to deal with problems like aggressive behavior, bullying, or frequent school absences.

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: Social Worker School
Taxonomy Code: 1041S0200X
Type: Behavioral Health & Social Service Providers
License State: CA

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 1679740021, 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 4

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 7 → 14 → 5 7 → 14 → 5 0 → 0 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 4 + 9 + 1 + 4 + 4 + 0 + 0 + 4 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1679740021.