Dr. David Gage Stewart, PHD
Dr. David Gage Stewart, PHD is an Addiction (Substance Use Disorder) Psychologist in Cambridge, Massachusetts. Practices as a sole proprietor. Licensed in Washington.
- Licensed in
- WA
- In the registry since
- 2013
- Specialties on file
- 4
What do these letters mean?
- PHD — Doctor of Philosophy
- A research doctorate. In healthcare it usually sits alongside a clinical licence.
Practice location Address checks out
1493 Cambridge StCambridge, MA 02139-1047
Phone: (425) 228-5336
Show map & directions
Directions in Google Maps · Apple Maps · OpenStreetMap
Pin is approximate — placed at the ZIP-code centre, not the exact door.
Specialties & licences
| Cognitive & Behavioral Psychologist (primary) | Taxonomy 103TB0200X · Licence PY00002443 (WA) |
|---|---|
| Addiction (Substance Use Disorder) Psychologist | Taxonomy 103TA0400X · Licence PY00002443 (WA) |
| Clinical Psychologist | Taxonomy 103TC0700X · Licence PY00002443 (WA) |
| Clinical Child & Adolescent Psychologist | Taxonomy 103TC2200X · Licence PY00002443 (WA) |
Record details
| NPI number | 1366781932 |
|---|---|
| Entity type | Individual (Type 1) |
| Gender | Male |
| Credentials | PHD |
| Sole proprietor | Yes |
| NPI enumerated | February 2, 2013 |
| Last updated in NPPES | September 11, 2025 |
Other providers in Cambridge
-
Dr. Judith E Krulewitz, PHD
545 Concord Ave Ste 20, Cambridge, MA 02138-1125 · (617) 818-2159
-
Dr. Melinda S Salomon, PHD
360 Mt Auburn St, Cambridge, MA 02138 · (774) 312-3334