Sylvester Williams, CASACT
NPI 1689754640 · Addiction (Substance Use Disorder) Counselor · Brooklyn, NY
Sylvester Williams, CASACT is a Addiction (Substance Use Disorder) Counselor provider in Brooklyn, NY (NPI 1689754640).
Provider details
- NPI number
- 1689754640
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- CASACT
- Sex
- Male
- Sole proprietor
- No
- License
- 19908 (NY)
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
19 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
- 2006-10-16
- Last updated
- 2007-07-08
Frequently asked questions
- What is Sylvester Williams's NPI number?
- Sylvester Williams's National Provider Identifier (NPI) is 1689754640, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sylvester Williams's specialty?
- Sylvester Williams is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Sylvester Williams located?
- Sylvester Williams's practice location on file with NPPES is 2857 W 8th St, Brooklyn, NY 11224-3604.
- What is Sylvester Williams's phone number?
- The practice phone number listed in the NPPES registry for Sylvester Williams is (718) 265-4200.
- Is Sylvester Williams's NPI active?
- Yes — Sylvester Williams's NPI (1689754640) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.