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

Mr. Donald Fredericks Nathanson, LCSW

Individual provider Clinical Social Worker · NPI 1275886871

Mr. Donald Fredericks Nathanson, LCSW is a Clinical Social Worker in Harrison, New York. Practices as a sole proprietor. Licensed in New Jersey and New York.

Licensed in
NJ, NY
In the registry since
2012
Specialties on file
2
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 →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

600 Mamaroneck Avenue Fourth Fl
Harrison, NY 10528
Phone: (310) 418-8200
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 083737 (NY)
Clinical Social Worker Taxonomy 1041C0700X · Licence 44SC05653800 (NJ)

Record details

NPI number1275886871
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorYes
NPI enumeratedOctober 19, 2012
Last updated in NPPESAugust 24, 2018

Other providers in Harrison