ZACHARY DYNELL WILLIS
NPI 1457821878
Psychologist - Cognitive & Behavioral in Los Angeles, CA

NPI Status: Active since November 28, 2018

Contact Information

3580 WILSHIRE BLVD STE 2000
LOS ANGELES, CA
ZIP 90010
Phone: (213) 381-1250
Fax: (213) 383-4803

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

Individual
Male
Psychologist
Cognitive & Behavioral

About ZACHARY WILLIS

This page provides the complete NPI Profile along with additional information for Zachary Willis, a provider established in Los Angeles, California with a medical specialization in Psychologist, focusing in cognitive & behavioral . The healthcare provider is registered in the NPI registry with number 1457821878 assigned on November 2018. The practitioner's primary taxonomy code is 103TB0200X. The provider is registered as an individual and his NPI record was last updated 2 years ago.

NPI: 1457821878
Provider Name: ZACHARY DYNELL WILLIS
Gender: Male
Entity Type: Individual
Location Address: 3580 WILSHIRE BLVD STE 2000 LOS ANGELES, CA 90010
Location Phone: (213) 381-1250
Location Fax: (213) 383-4803
Mailing Address: 1002 OSWEGO ST, UTICA UTICA, NY 13502
Mailing Phone: (315) 798-8868
Is Sole Proprietor?: No
Enumeration Date: 11-28-2018
Last Update Date: 10-16-2024
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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 Cognitive & Behavioral
Taxonomy Code: 103TB0200X
Type: Behavioral Health & Social Service Providers
License State: NY
Taxonomy Description: A psychologist who reflects an experimental-clinical approach distinguished by use of principles of human learning and development and theories of cognitive processing to promote meaningful change in maladaptive human behavior and thinking.

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 1457821878, 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 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 → 10 → 1 + 0

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 14 → 1 + 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 5 → 10 → 1 8 → 16 → 7 1 → 2 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 1 + 0 + 7 + 1 + 6 + 2 + 2 + 8 + 1 + 4 + 24 = 62

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

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1457821878.