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

Walter Duncan Simpson, LCSW

Individual provider Clinical Social Worker · NPI 1407308984

Walter Duncan Simpson, LCSW is a Clinical Social Worker in Greenwich, Connecticut. Practices as a sole proprietor. Licensed in Connecticut and New York.

Licensed in
CT, NY
In the registry since
2016
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

112 Mason St
Greenwich, CT 06830-6629
Phone: (203) 249-2992
Show map & directions

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 010322 (CT)
Clinical Social Worker Taxonomy 1041C0700X · Licence 098613 (NY)

Record details

NPI number1407308984
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorYes
NPI enumeratedOctober 31, 2016
Last updated in NPPESFebruary 25, 2022
Certification dateFebruary 25, 2022
Mailing address1332 Midland Ave Apt 4h, Bronxville, NY 10708-6812

Other providers in Greenwich