Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Helen Leff, LCSW

Individual provider Clinical Social Worker · NPI 1487288866

Helen Leff, LCSW is a Clinical Social Worker in Purchase, New York. Works from 2 locations. Registered with an NPI since 2020.

In the registry since
2020
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

See every abbreviation used in this directory →

Practice location Address checks out

2975 Westchester Ave Ste G03
Purchase, NY 10577-2580
Phone: (646) 483-3848
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 633 3rd Ave, New York, NY 10017-6706 — (646) 483-3848

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X

Record details

NPI number1487288866
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedFebruary 25, 2020
Last updated in NPPESFebruary 25, 2020
Certification dateFebruary 25, 2020
Mailing address2665 Netherland Ave, Bronx, NY 10463-4808

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