Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Service First of Northern California

Addiction (Substance Use Disorder) Counselor in Stockton, CA · enumerated 2007 · authorized official Brenda Shelton, Program Manager.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1912122250

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Registry record

Entity type Organization (Type 2)

Legal business name Service First of Northern California

Practice address Service First of Northern California, 3422 West. Hammer Lane Suite A,B,C, Stockton, CA, 95219

Phone (209) 888-5088

Fax (209) 451-1334

Enumeration date Apr 13, 2007

Last updated in NPPES Sep 1, 2022

Taxonomy & classification

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 390017AN (CA) Primary

Authorized official

Name Brenda Shelton

Title Program Manager

Phone (209) 762-3014

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Service First of Northern California?

Service First of Northern California is registered in NPPES as a Addiction (Substance Use Disorder) Counselor (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-09-01.