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

Nathaniel O'Neil, LCSW

Individual provider Clinical Social Worker · NPI 1801468616

Nathaniel O'Neil, LCSW is a Clinical Social Worker in Lake Grove, New York. Works from 2 locations. Licensed in New York.

Licensed in
NY
In the registry since
2021
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

2233 Nesconset Hwy
Lake Grove, NY 11755-1000
Phone: (631) 786-8930
Show map & directions

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

Additional practice locations (1)

  • 1757 North Ocean Ave, Medford, NY 11763 — (631) 654-1919

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 106007-1 (NY)

Record details

NPI number1801468616
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorNo
NPI enumeratedJuly 12, 2021
Last updated in NPPESJanuary 8, 2026
Certification dateJanuary 8, 2026
Mailing address2233 Nesconset Hwy Ste 106, Lake Grove, NY 11755-1000

Other providers in Lake Grove