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DR. DAVID GAGE STEWART PH.D.
NPI 1366781932
Psychologist - Cognitive & Behavioral in Cambridge, MA

Active since February 02, 2013
1493 CAMBRIDGE ST, CAMBRIDGE, MA 02139(425) 228-5336 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Sep 11, 2025, Jul 21, 2022, Jun 15, 2017 (3 updates tracked since 2017).

About Dr. David Gage Stewart Ph.d. NPPES

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

DR. DAVID GAGE STEWART PH.D. (NPI 1366781932) is an individual cognitive & behavioral provider in Cambridge, Massachusetts, licensed in Washington (PY00002443) and active in the NPI registry since February 2013.

NPPES Registry Identity

NPI1366781932
Entity TypeIndividualMale
Primary Taxonomy103TB0200X
Provider Legal NameDR. DAVID GAGE STEWARTCredential: PH.D.
Location Address1493 CAMBRIDGE STCambridge, MA 02139-1047
Mailing Address9609 13th Ave SwSeattle, WA 98106-2919 · (206) 354-8494
Phone(425) 228-5336
Sole ProprietorYes
Enumeration DateFebruary 2, 2013
Last NPPES UpdateSeptember 11, 20253 updates tracked since enumeration
✔ NPI 1366781932 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyPsychologist · Cognitive & BehavioralBehavioral Health & Social Service Providers
Taxonomy Code103TB0200X
License✔ Licensed in WA · PY00002443
Definition
A psychologist who reflects an experimental-clinical approach distinguished by use of principles of human learning and development and theories of cognitive processing to promote meaningful change in maladaptive human behavior and thinking.
Also ListedPsychologist · Addiction (Substance Use Disorder)Taxonomy 103TA0400X · License PY00002443 (WA)
Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License PY00002443 (WA)
Also ListedPsychologist · Clinical Child & AdolescentTaxonomy 103TC2200X · License PY00002443 (WA)
1493 CAMBRIDGE ST, Cambridge, MA 02139
Open in Google Maps ↗

Other Providers at the Same Location NPPES 20

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

ZACHARY OLIFF DO
Emergency Medicine
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 665-1000
JACOB DYLAN WOLFE LICSW
Social Worker (Clinical)
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 665-1646
SARAH-JO SANTILLI RN
Registered Nurse
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 272-6455
JULIE LYNNE MERCER
Registered Nurse
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 591-4212
TAIANA KATSARAS LICSW
Social Worker (Clinical)
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 665-1185
ANGELA DE SILVA
Registered Nurse (Ambulatory Care)
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 665-1000
RORY HAUSER
Registered Nurse (Neonatal, Low-Risk)
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (802) 595-9868
CASEY TRAN
Occupational Therapist
1493 CAMBRIDGE ST
CAMBRIDGE, MA 02139
Middlesex County (617) 665-1000

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 David Stewart's NPI number?

The NPI number for David Stewart is 1366781932. It was assigned to this individual provider in the NPPES registry on February 2, 2013.

Where is David Stewart located?

David Stewart practices at 1493 Cambridge St, Cambridge, MA 02139. The listed phone number is (425) 228-5336.

What is David Stewart's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Cognitive & Behavioral, with taxonomy code 103TB0200X.

When was this NPI record last updated?

The NPPES record for David Stewart was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.