Jeff Westermann
NPI 1598267197 · Addiction (Substance Use Disorder) Counselor · Fairfield, CA
Jeff Westermann is a Addiction (Substance Use Disorder) Counselor provider in Fairfield, CA (NPI 1598267197).
Provider details
- NPI number
- 1598267197
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 24372 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-02-28
- Last updated
- 2026-05-05
- Certified
- 2026-05-05
Frequently asked questions
- What is Jeff Westermann's NPI number?
- Jeff Westermann's National Provider Identifier (NPI) is 1598267197, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeff Westermann's specialty?
- Jeff Westermann is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Jeff Westermann located?
- Jeff Westermann's practice location on file with NPPES is 609 Jefferson St, Fairfield, CA 94533-6293.
- What is Jeff Westermann's phone number?
- The practice phone number listed in the NPPES registry for Jeff Westermann is (707) 399-9190.
- Is Jeff Westermann's NPI active?
- Yes — Jeff Westermann's NPI (1598267197) is active in the NPPES registry as of the last update on 2026-05-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.