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