IndividualActive
William Sinclair, LMSW
NPI 1629213343 · Clinical Social Worker · New York, NY
William Sinclair, LMSW is a Clinical Social Worker provider in New York, NY (NPI 1629213343).
Provider details
- NPI number
- 1629213343
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LMSW
- Sex
- Male
- Sole proprietor
- No
- License
- 00077872 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(86/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 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
19 Union Sq W
7th Fl
New York, NY 10003-3304
Phone: (212) 627-9600
Fax: (212) 627-4040
Street-level locationGet directions
Mailing address
19 Union Sq W
New York, NY 10003-3304
Registry dates
- Enumerated
- 2008-12-09
- Last updated
- 2008-12-09
Frequently asked questions
- What is William Sinclair's NPI number?
- William Sinclair's National Provider Identifier (NPI) is 1629213343, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Sinclair's specialty?
- William Sinclair is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Sinclair located?
- William Sinclair's practice location on file with NPPES is 19 Union Sq W, New York, NY 10003-3304.
- What is William Sinclair's phone number?
- The practice phone number listed in the NPPES registry for William Sinclair is (212) 627-9600.
- Is William Sinclair's NPI active?
- Yes — William Sinclair's NPI (1629213343) is active in the NPPES registry as of the last update on 2008-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.