TRISHA WILLIAMS
NPI 1417493339
Counselor - Addiction (Substance Use Disorder) in Stockton, CA

NPI Status: Active since January 17, 2017

Contact Information

1839 S EL DORADO ST
STOCKTON, CA
ZIP 95206
Phone: (094) 664-2002
Fax: (209) 938-0281

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  • Individual
  • Female
  • Counselor
  • Addiction (Substance Use Disorder)

About TRISHA WILLIAMS

This page provides the complete NPI Profile along with additional information for Trisha Williams, a provider established in Stockton, California with a medical specialization in Counselor, focusing in addiction (substance use disorder) . The healthcare provider is registered in the NPI registry with number 1417493339 assigned on January 2017. The practitioner's primary taxonomy code is 101YA0400X with license number 6480 (CA). The provider is registered as an individual and her NPI record was last updated April 2026.

NPI
1417493339
Provider Name
TRISHA WILLIAMS
Gender
Female
Entity Type
Individual
Location Address
1839 S EL DORADO ST STOCKTON, CA 95206
Location Phone
(094) 664-2002
Location Fax
(209) 938-0281
Mailing Address
1839 S EL DORADO ST STOCKTON, CA 95206
Mailing Phone
(209) 466-4200
Mailing Fax
(209) 938-0281
Is Sole Proprietor?
No
Enumeration Date
01-17-2017
Last Update Date
04-16-2026
Code Navigator

A Substance Abuse or Addiction Counselor like Trisha Williams advices patients who experience alcoholism, drug addiction, eating disorders, mental health issues, or other mental or behavioral problems. Substance Abuse counselors provide treatment and support to help clients recover from addiction or modify problem behaviors. Many counselors incorporate the principles of 12-step programs, such as Alcoholics Anonymous (AA). They educate clients how to cope with stress and life’s issues in ways that help them recover. Counselors also help patients improve their personal relationships and find ways to discuss their addiction or other problems with family and friends.

Location Map

Secondary Locations

  • 590 Rio Lindo Ave
    Chico, CA 95926
    (530) 897-0562
  • 541 S Ham Ln Ste A&b
    Lodi, CA 95242
    (209) 224-8940

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 Addiction (Substance Use Disorder)

Taxonomy Code
101YA0400X
Type
Behavioral Health & Social Service Providers
License No.
6480
License State
CA

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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 1417493339, we treat the final digit (9) 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 71. The final step is to find the difference between that total and the next multiple of ten (80 - 71 = 9).

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
1
Doubled → 2
Pos 2
4
Unchanged
Pos 3
1
Doubled → 2
Pos 4
7
Unchanged
Pos 5
4
Doubled → 8
Pos 6
9
Unchanged
Pos 7
3
Doubled → 6
Pos 8
3
Unchanged
Pos 9
3
Doubled → 6
Check
9
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 1 → 2 4 → 8 3 → 6 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 2 + 7 + 8 + 9 + 6 + 3 + 6 + 24 = 71

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

The next multiple of ten after 71 is 80. The difference is the calculated check digit.

80 - 71 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1417493339.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Pharmacy (Community/Retail Pharmacy)
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST, SUITE C
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Family Medicine
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Substance Abuse Rehabilitation Facility
1839 S EL DORADO ST
STOCKTON, CA 95206
Nurse Practitioner (Family)
1839 S EL DORADO ST
STOCKTON, CA 95206
Licensed Vocational Nurse
1839 S EL DORADO ST
STOCKTON, CA 95206
Nurse Practitioner
1839 S EL DORADO ST
STOCKTON, CA 95206
Licensed Psychiatric Technician
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206
Counselor (Addiction (Substance Use Disorder))
1839 S EL DORADO ST
STOCKTON, CA 95206

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1417493339, enumerated as an "individual" on January 17, 2017.

The provider is located at 1839 S EL DORADO ST STOCKTON, CA 95206 and the phone number is (094) 664-2002.

Counselor with taxonomy code 101YA0400X and a focus in Addiction (Substance Use Disorder).