MR. EUGENE HAYES
NPI 1821986183
Peer Specialist in San Jose, CA

NPI Status: Active since June 25, 2025

Contact Information

425 E SANTA CLARA ST
SAN JOSE, CA
ZIP 95113
Phone: (669) 254-3428
Fax: (408) 800-4095

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

Individual
Male
Peer Specialist

About EUGENE HAYES

This page provides the complete NPI Profile along with additional information for Eugene Hayes, a provider established in San Jose, California with a medical specialization in Peer Specialist. The healthcare provider is registered in the NPI registry with number 1821986183 assigned on June 2025. The practitioner's primary taxonomy code is 175T00000X. The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1821986183
Provider Name: MR. EUGENE HAYES
Gender: Male
Entity Type: Individual
Location Address: 425 E SANTA CLARA ST SAN JOSE, CA 95113
Location Phone: (669) 254-3428
Location Fax: (408) 800-4095
Mailing Address: 425 E SANTA CLARA ST SAN JOSE, CA 95113
Mailing Phone: (669) 254-3428
Mailing Fax: (408) 800-4095
Is Sole Proprietor?: Yes
Enumeration Date: 06-25-2025
Last Update Date: 07-24-2025
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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: Peer Specialist
Taxonomy Code: 175T00000X
Type: Other Service Providers
Taxonomy Description: Individuals certified to perform peer support services through a training process defined by a government agency, such as the Department of Veterans Affairs or a state mental health department/certification/licensing authority.

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	225400000X	Respiratory, Developmental, Rehabilitative and Restorative Service Providers	Rehabilitation Practitioner	MPSS-QINHEK (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 1821986183, we treat the final digit (3) 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 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 3).

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 → 4

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

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 2 → 4 9 → 18 → 9 6 → 12 → 3 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 4 + 1 + 1 + 8 + 8 + 1 + 2 + 1 + 1 + 6 + 24 = 67

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

The next multiple of ten after 67 is 70. The difference is the calculated check digit.

70 - 67 = 3

This NPI is valid

The calculated check digit is 3, which matches the last digit of 1821986183.