Joseph Williams, MSW, PPSC
NPI 1235082454 · School Social Worker · San Marcos, CA
Joseph Williams, MSW, PPSC is a School Social Worker provider in San Marcos, CA (NPI 1235082454).
Provider details
- NPI number
- 1235082454
- Entity type
- Individual
- Primary specialty
- School Social WorkerBehavioral Health & Social Service Providers
- Credential
- MSW, PPSC
- Sex
- Male
- Sole proprietor
- No
- License
- 240192831 (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
Under 1 yr in 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
- 2026-02-17
- Last updated
- 2026-02-17
- Certified
- 2026-02-17
Frequently asked questions
- What is Joseph Williams's NPI number?
- Joseph Williams's National Provider Identifier (NPI) is 1235082454, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Williams's specialty?
- Joseph Williams is listed in the NPPES registry with a primary specialty of School Social Worker (Behavioral Health & Social Service Providers).
- Where is Joseph Williams located?
- Joseph Williams's practice location on file with NPPES is 650 W Mission Rd, San Marcos, CA 92069-1555.
- What is Joseph Williams's phone number?
- The practice phone number listed in the NPPES registry for Joseph Williams is (760) 290-2517.
- Is Joseph Williams's NPI active?
- Yes — Joseph Williams's NPI (1235082454) is active in the NPPES registry as of the last update on 2026-02-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.