William Wisniewski, L.C.S.W
NPI 1649561036 · Clinical Social Worker · Brentwood, NY
Enrolled with Medicare as Order and Referring Only - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Wisniewski, L.C.S.W is a Clinical Social Worker provider in Brentwood, NY (NPI 1649561036).
Provider details
- NPI number
- 1649561036
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- L.C.S.W
- Sex
- Male
- Sole proprietor
- Yes
- License
- 088338 (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
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
- 2011-04-20
- Last updated
- 2019-10-22
Frequently asked questions
- What is William Wisniewski's NPI number?
- William Wisniewski's National Provider Identifier (NPI) is 1649561036, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Wisniewski's specialty?
- William Wisniewski is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Wisniewski located?
- William Wisniewski's practice location on file with NPPES is 998 Crooked Hill Rd Bldg 56, Brentwood, NY 11717-1019.
- What is William Wisniewski's phone number?
- The practice phone number listed in the NPPES registry for William Wisniewski is (631) 761-2177.
- Does William Wisniewski accept Medicare?
- William Wisniewski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Wisniewski's NPI active?
- Yes — William Wisniewski's NPI (1649561036) is active in the NPPES registry as of the last update on 2019-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.