William Vanderzwan, LCSW
NPI 1801159413 · Clinical Social Worker · Bakersfield, CA
William Vanderzwan, LCSW is a Clinical Social Worker provider in Bakersfield, CA (NPI 1801159413).
Provider details
- NPI number
- 1801159413
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- LCSW20354 (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
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 3300 Truxtun AveBakersfield, CA 93301-3137Phone: (661) 342-6229
Registry dates
- Enumerated
- 2012-06-19
- Last updated
- 2023-03-19
- Certified
- 2023-03-19
Frequently asked questions
- What is William Vanderzwan's NPI number?
- William Vanderzwan's National Provider Identifier (NPI) is 1801159413, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Vanderzwan's specialty?
- William Vanderzwan is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Vanderzwan located?
- William Vanderzwan's practice location on file with NPPES is 11309 Talladega Ct, Bakersfield, CA 93312-6454.
- What is William Vanderzwan's phone number?
- The practice phone number listed in the NPPES registry for William Vanderzwan is (661) 342-6229.
- Is William Vanderzwan's NPI active?
- Yes — William Vanderzwan's NPI (1801159413) is active in the NPPES registry as of the last update on 2023-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.