PATRICK GAFFNEY
NPI 1336077304
Counselor - School in Concord, CA

NPI Status: Active since May 11, 2026

Contact Information

1101 ALBERTA WAY
CONCORD, CA
ZIP 94521
Phone: (925) 682-7474

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

Individual
Male
Counselor
School

About PATRICK GAFFNEY

This page provides the complete NPI Profile along with additional information for Patrick Gaffney, a provider established in Concord, California with a medical specialization in Counselor, focusing in school . The healthcare provider is registered in the NPI registry with number 1336077304 assigned on May 2026. The practitioner's primary taxonomy code is 101YS0200X with license number 260037136 (CA). The provider is registered as an individual and his NPI record was last updated May 2026. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization.

NPI: 1336077304
Provider Name: PATRICK GAFFNEY
Gender: Male
Entity Type: Individual
Location Address: 1101 ALBERTA WAY CONCORD, CA 94521
Location Phone: (925) 682-7474
Mailing Address: 1101 ALBERTA WAY CONCORD, CA 94521
Mailing Phone: (925) 682-7474
Is Sole Proprietor?: Yes
Enumeration Date: 05-11-2026
Last Update Date: 05-11-2026
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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: Counselor School
Taxonomy Code: 101YS0200X
Type: Behavioral Health & Social Service Providers
License No.: 260037136
License State: CA

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

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 1336077304, we treat the final digit (4) 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 56. The final step is to find the difference between that total and the next multiple of ten (60 - 56 = 4).

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 → 6

Pos 4

Unchanged

Pos 5

Doubled → 0

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 0

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 3 → 6 0 → 0 7 → 14 → 5 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 6 + 6 + 0 + 7 + 1 + 4 + 3 + 0 + 24 = 56

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

The next multiple of ten after 56 is 60. The difference is the calculated check digit.

60 - 56 = 4

This NPI is valid

The calculated check digit is 4, which matches the last digit of 1336077304.