Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1366781932 Individual Practitioner Male Practitioner

Dr. David Gage Stewart , PhD

Psychologist - Cognitive & Behavioral • Cambridge, MA

Professional Overview & Biography Verified Profile Summary

Dr. David Stewart, PhD is a registered healthcare professional specializing in Psychologist - Cognitive & Behavioral in Cambridge, MA. Practice services are available at 1493 CAMBRIDGE ST under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

1493 Cambridge St

Cambridge, MA 021391047

Telephone 4252285336
Associated Practice Facility / Clinic

Specialty Benchmarks & Practice Insights

Comparative analytics for Psychologist - Cognitive & Behavioral in Cambridge, MA

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 10.5 Yrs
State Avg: 33.5 Yrs
Regional Practice Density
3 Specialists

Practicing in Cambridge, MA (102 Statewide)

Telehealth Adoption Rate
0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

Psychologist - Cognitive & Behavioral Primary Specialty

NUCC Taxonomy Code: 103TB0200X

State License WA PY00002443

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.

Psychologist - Addiction (Substance Use Disorder)

NUCC Taxonomy Code: 103TA0400X

State License WA PY00002443

A psychologist with a proficiency that involves the application of psychological treatment of addiction stemming from the use of alcohol and other psychoactive substances (e.g., nicotine, marijuana, cocaine, heroin) or behavioral addictions (e.g., gambling) with the aim of cessation or reduction of use and/or the amelioration of emotional, behavioral, interpersonal and other problems arising from the addictive behavior.

Psychologist - Clinical

NUCC Taxonomy Code: 103TC0700X

State License WA PY00002443

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

Psychologist - Clinical Child & Adolescent

NUCC Taxonomy Code: 103TC2200X

State License WA PY00002443

A psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents within their social context. Of particular importance to the specialty of clinical child psychology is an understanding of the basic psychological needs of children and adolescents, and how the family and other social contexts influence the socio-emotional adjustment, cognitive development, behavioral adaptation and health status of children and adolescents.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

14 Associated Practitioners
Dr. Patricia Barnes , MD

Psychiatry & Neurology - Psychiatry

NPI 1154464527

Doctor of Medicine (M.D.)

NPI 1225308455

Licensed Mental Health Counselor

Dr. Trina Tobey Eide , PsyD

Psychologist - Clinical

NPI 1225352263

Doctor of Psychology (Psy.D.)

Jennifer Moore , LMHC

Counselor - Mental Health

NPI 1225554918

Licensed Mental Health Counselor

Dharamuni Chea , LICSW

Counselor - Mental Health

NPI 1326352360

Licensed Independent Clinical Social Worker

Valerie Castillo

Counselor - Mental Health

NPI 1376216259

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

11 Historical Events
NPI Profile Active June 15, 2017

NPI status registered as active in NPPES database

📍
Updated Practice Location June 15, 2017

Registered at 1493 CAMBRIDGE ST, CAMBRIDGE, MA 021391047 (Tel: 4252285336)

📍
Updated Business Mailing Address June 15, 2017

Registered at 9609 13TH AVE SW, SEATTLE, WA 981062919 (Tel: (206) 354-8494)

👤
Provider Name / Credentials Updated June 15, 2017

Recorded as DAVID STEWART, PH.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) June 15, 2017

Psychologist (License #PY00002443 in WA)

NPI Profile Active February 02, 2013

NPI status registered as active in NPPES database

📍
Updated Practice Location February 02, 2013

Registered at 600 OAKESDALE AVE SW, #104, RENTON, WA 980575226 (Tel: 4252285336)

📍
Updated Business Mailing Address February 02, 2013

Registered at 9609 13TH AVE SW, SEATTLE, WA 981062919 (Tel: 2063548494)

👤
Provider Name / Credentials Updated February 02, 2013

Recorded as DAVID STEWART, PH.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) February 02, 2013

Psychologist (License #PY00002443 in WA)

🟢
Initial NPI Registration & Enumeration February 02, 2013

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1366781932
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: February 02, 2013
Last Update: September 11, 2025
Sole Proprietor: Yes

Mailing Address

9609 13th Ave Sw

Seattle, WA 981062919

Phone: 2063548494

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.