MRS. SUSAN LOUISE VILLARREAL
NPI 1477822997
Rehabilitation Practitioner in San Jose, CA

NPI Status: Active since December 29, 2011

Contact Information

102 S 11TH ST
SAN JOSE, CA
ZIP 95112
Phone: (408) 998-5191
Fax: (408) 279-1930

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

Individual
Female
Rehabilitation Practitioner

About SUSAN VILLARREAL

This page provides the complete NPI Profile along with additional information for Susan Villarreal, a provider established in San Jose, California with a medical specialization in Rehabilitation Practitioner. The healthcare provider is registered in the NPI registry with number 1477822997 assigned on December 2011. The practitioner's primary taxonomy code is 225400000X. The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1477822997
Provider Name: MRS. SUSAN LOUISE VILLARREAL
Gender: Female
Entity Type: Individual
Location Address: 102 S 11TH ST SAN JOSE, CA 95112
Location Phone: (408) 998-5191
Location Fax: (408) 279-1930
Mailing Address: 102 S 11TH ST SAN JOSE, CA 95112
Mailing Phone: (408) 998-5191
Mailing Fax: (408) 279-1930
Is Sole Proprietor?: Yes
Enumeration Date: 12-29-2011
Last Update Date: 06-27-2025
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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: Rehabilitation Practitioner
Taxonomy Code: 225400000X
Type: Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Description: A health care practitioner who trains or retrains individuals disabled by disease or injury to help them attain their maximum functional capacity.

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)

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 1477822997, we treat the final digit (7) 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 73. The final step is to find the difference between that total and the next multiple of ten (80 - 73 = 7).

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 → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

Doubled → 18 → 1 + 8

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 8 → 16 → 7 2 → 4 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 1 + 4 + 7 + 1 + 6 + 2 + 4 + 9 + 1 + 8 + 24 = 73

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

The next multiple of ten after 73 is 80. The difference is the calculated check digit.

80 - 73 = 7

This NPI is valid

The calculated check digit is 7, which matches the last digit of 1477822997.