EUGENE RUSSELL
NPI 1750100558
Counselor - Professional in Oceanside, CA

NPI Status: Active since October 08, 2024

Contact Information

1701 MISSION AVE STE 230
OCEANSIDE, CA
ZIP 92058
Phone: (760) 721-3535

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

Individual
Male
Counselor
Professional

About EUGENE RUSSELL

This page provides the complete NPI Profile along with additional information for Eugene Russell, a provider established in Oceanside, California with a medical specialization in Counselor, focusing in professional . The healthcare provider is registered in the NPI registry with number 1750100558 assigned on October 2024. The practitioner's primary taxonomy code is 101YP2500X with license number 21404 (CA). The provider is registered as an individual and his NPI record was last updated January 2026.

NPI: 1750100558
Provider Name: EUGENE RUSSELL
Gender: Male
Entity Type: Individual
Location Address: 1701 MISSION AVE STE 230 OCEANSIDE, CA 92058
Location Phone: (760) 721-3535
Mailing Address: 1701 MISSION AVE STE 230 OCEANSIDE, CA 92058
Mailing Phone: (818) 268-6567
Is Sole Proprietor?: Yes
Enumeration Date: 10-08-2024
Last Update Date: 01-06-2026
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Location Map

Secondary Locations

1011 Camino Del Rio S Ste 300
San Diego, CA 92108
(619) 287-8225

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 Professional
Taxonomy Code: 101YP2500X
Type: Behavioral Health & Social Service Providers
License No.: 21404
License State: CA

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	101YA0400X	Behavioral Health & Social Service Providers	Counselor Addiction (Substance Use Disorder)
2	390200000X	Student, Health Care	Student in an Organized Health Care Education/Training Program

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 1750100558, 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 42. The final step is to find the difference between that total and the next multiple of ten (50 - 42 = 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 → 2

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 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 5 → 10 → 1 1 → 2 0 → 0 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 1 + 0 + 0 + 2 + 0 + 0 + 5 + 1 + 0 + 24 = 42

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

The next multiple of ten after 42 is 50. The difference is the calculated check digit.

50 - 42 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1750100558.