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JEFF WESTERMANN
NPI 1598267197
Counselor - Addiction (Substance Use Disorder) in Fairfield, CA

Active since February 28, 2018
609 JEFFERSON ST, FAIRFIELD, CA 94533(707) 399-9190 Get Directions Write a Review

NPPES record last updated: May 5, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: May 5, 2026, Feb 28, 2018 (2 updates tracked since 2018).

About Jeff Westermann NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JEFF WESTERMANN (NPI 1598267197) is an individual addiction (substance use disorder) provider in Fairfield, California, licensed in California (24372) and active in the NPI registry since February 2018.

NPPES Registry Identity

NPI1598267197
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameJEFF WESTERMANN
Location Address609 JEFFERSON STFairfield, CA 94533-6293
Mailing Address824 Granada LnVacaville, CA 95688-2041 · (916) 340-5821
Phone(707) 399-9190
Sole ProprietorNo
Enumeration DateFebruary 28, 2018
Last NPPES UpdateMay 5, 20262 updates tracked since enumeration
NPPES CertifiedMay 5, 2026
✔ NPI 1598267197 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
License✔ Licensed in CA · 24372
609 JEFFERSON ST, Fairfield, CA 94533
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Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SHARON ANN BENDER L.C.S.W.
Social Worker (Clinical)
609 JEFFERSON ST, STE E
FAIRFIELD, CA 94533
Solano County (707) 434-0962
WAVERLY ARIEL COOK
Counselor (Addiction (Substance Use Disorder))
609 JEFFERSON ST
FAIRFIELD, CA 94533
Solano County (707) 399-9190
MS. AMANDA MITCHELL
Counselor (Addiction (Substance Use Disorder))
609 JEFFERSON ST
FAIRFIELD, CA 94533
Solano County (707) 399-9190
KATHRYN BEATRICE WAGONER
Counselor (Addiction (Substance Use Disorder))
609 JEFFERSON ST
FAIRFIELD, CA 94533
Solano County (707) 399-9190
ARCHWAY RECOVERY SERVICES INC
Substance Abuse Rehabilitation Facility
609 JEFFERSON ST
FAIRFIELD, CA 94533
Solano County (707) 399-9190

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jeff Westermann's NPI number?

The NPI number for Jeff Westermann is 1598267197. It was assigned to this individual provider in the NPPES registry on February 28, 2018.

Where is Jeff Westermann located?

Jeff Westermann practices at 609 Jefferson St, Fairfield, CA 94533. The listed phone number is (707) 399-9190.

What is Jeff Westermann's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for Jeff Westermann was last updated on May 5, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.