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

Jillian Johnstone, LCSW

Individual provider School Social Worker · NPI 1275786659

Jillian Johnstone, LCSW is a School Social Worker in Greenport, New York. Works from 2 locations. Licensed in New York.

Licensed in
NY
In the registry since
2008
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 →

Practice location Address checks out

720 Frnt ST
Greenport, NY 11944-1500
Phone: (631) 477-1950
Fax: (631) 477-2164
Show map & directions

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

Additional practice locations (1)

  • 1305 Crown Land Ln, Cutchogue, NY 11935-1254 — (631) 680-9770

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 078852 (NY)
School Social Worker Taxonomy 1041S0200X · Licence 078852 (NY)

Record details

NPI number1275786659
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedOctober 29, 2008
Last updated in NPPESJuly 24, 2024
Certification dateJuly 24, 2024
Mailing address720 Front St, Greenport, NY 11944-1500