Leslie Altmark, M.A., LCSW-R
NPI 1689972564 · Clinical Social Worker · New York, NY
Leslie Altmark, M.A., LCSW-R is a Clinical Social Worker provider in New York, NY (NPI 1689972564).
Provider details
- NPI number
- 1689972564
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- M.A., LCSW-R
- Sex
- Female
- Sole proprietor
- Yes
- License
- R002992-1 (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
- 2011-03-02
- Last updated
- 2011-03-02
Frequently asked questions
- What is Leslie Altmark's NPI number?
- Leslie Altmark's National Provider Identifier (NPI) is 1689972564, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leslie Altmark's specialty?
- Leslie Altmark is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Leslie Altmark located?
- Leslie Altmark's practice location on file with NPPES is 41-51 East 11th Street, New York, NY 10003.
- What is Leslie Altmark's phone number?
- The practice phone number listed in the NPPES registry for Leslie Altmark is (212) 477-2600.
- Is Leslie Altmark's NPI active?
- Yes — Leslie Altmark's NPI (1689972564) is active in the NPPES registry as of the last update on 2011-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.