Helen Leff, LCSW
NPI 1487288866 · Clinical Social Worker · Purchase, NY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Helen Leff, LCSW is a Clinical Social Worker provider in Purchase, NY (NPI 1487288866).
Provider details
- NPI number
- 1487288866
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
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
6 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 633 3rd AveNew York, NY 10017-6706Phone: (646) 483-3848
Registry dates
- Enumerated
- 2020-02-25
- Last updated
- 2020-02-25
- Certified
- 2020-02-25
Frequently asked questions
- What is Helen Leff's NPI number?
- Helen Leff's National Provider Identifier (NPI) is 1487288866, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Helen Leff's specialty?
- Helen Leff is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Helen Leff located?
- Helen Leff's practice location on file with NPPES is 2975 Westchester Ave Ste G03, Purchase, NY 10577-2580.
- What is Helen Leff's phone number?
- The practice phone number listed in the NPPES registry for Helen Leff is (646) 483-3848.
- Does Helen Leff accept Medicare?
- Helen Leff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Helen Leff's NPI active?
- Yes — Helen Leff's NPI (1487288866) is active in the NPPES registry as of the last update on 2020-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.