1. Home
  2. Directory
  3. Connecticut
  4. Greenwich
  5. Social Worker
  6. NPI Profile

WALTER DUNCAN SIMPSON LCSW
NPI 1407308984
Social Worker - Clinical in Greenwich, CT

Active since October 31, 2016
112 MASON ST, GREENWICH, CT 06830(203) 249-2992 Get Directions Write a Review

NPPES record last updated: February 25, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 25, 2022, Apr 4, 2019, Jul 25, 2018 and 4 more (7 updates tracked since 2016).

About Walter Duncan Simpson Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WALTER DUNCAN SIMPSON LCSW (NPI 1407308984) is an individual clinical provider in Greenwich, Connecticut, licensed in Connecticut (010322) and active in the NPI registry since October 2016.

NPPES Registry Identity

NPI1407308984
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameWALTER DUNCAN SIMPSONCredential: LCSW
Location Address112 MASON STGreenwich, CT 06830-6629
Mailing Address1332 Midland Ave Apt 4hBronxville, NY 10708-6812 · (203) 249-7992
Phone(203) 249-2992
Sole ProprietorYes
Enumeration DateOctober 31, 2016
Last NPPES UpdateFebruary 25, 20227 updates tracked since enumeration
NPPES CertifiedFebruary 25, 2022
✔ NPI 1407308984 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
Licenses✔ Licensed in CT · 010322✔ Licensed in NY · 098613
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
112 MASON ST, Greenwich, CT 06830
Open in Google Maps ↗

Other Names 1

Professional Name (2)W. Duncan Simpson Lcsw

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TINA M CORLETT LCSW
Social Worker (Clinical)
112 MASON ST
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 561-9350

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Walter Simpson's NPI number?

The NPI number for Walter Simpson is 1407308984. It was assigned to this individual provider in the NPPES registry on October 31, 2016. The provider is also known as W. Duncan Simpson Lcsw.

Where is Walter Simpson located?

Walter Simpson practices at 112 Mason St, Greenwich, CT 06830. The listed phone number is (203) 249-2992.

What is Walter Simpson's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for Walter Simpson was last updated on February 25, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.