Sydney Ferris Williams, A.S.W.
NPI 1114223989 · Clinical Social Worker · Oakland, CA
Sydney Ferris Williams, A.S.W. is a Clinical Social Worker provider in Oakland, CA (NPI 1114223989).
Provider details
- NPI number
- 1114223989
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- A.S.W.
- Sex
- Female
- Sole proprietor
- No
- License
- ASW27532 (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
15 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
- 2011-01-26
- Last updated
- 2022-01-11
- Certified
- 2021-12-20
Frequently asked questions
- What is Sydney Ferris Williams's NPI number?
- Sydney Ferris Williams's National Provider Identifier (NPI) is 1114223989, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sydney Ferris Williams's specialty?
- Sydney Ferris Williams is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Sydney Ferris Williams located?
- Sydney Ferris Williams's practice location on file with NPPES is 1800 Harrison St Fl 7, Oakland, CA 94612-3466.
- What is Sydney Ferris Williams's phone number?
- The practice phone number listed in the NPPES registry for Sydney Ferris Williams is (510) 625-2856.
- Is Sydney Ferris Williams's NPI active?
- Yes — Sydney Ferris Williams's NPI (1114223989) is active in the NPPES registry as of the last update on 2022-01-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.