David Gage Stewart, PH.D.

Primary specialty

Cognitive & Behavioral PsychologistTaxonomy code 103TB0200X

License

PY00002443 Issued in WA

Practice address

1493 Cambridge St
Cambridge, MA 02139-1047

Phone

(425) 228-5336

NPI assigned

Feb 2, 2013

Sex

Male

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 4

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Philosophy

State licenses

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1359763200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1366781932",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9609 13TH AVE SW",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981062919",
            "telephone_number": "206-354-8494"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1493 CAMBRIDGE ST",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021391047",
            "telephone_number": "425-228-5336"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "STEWART",
        "first_name": "DAVID",
        "middle_name": "GAGE",
        "name_prefix": "Dr.",
        "credential": "PH.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2013-02-02",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TA0400X",
            "taxonomy_group": "",
            "desc": "Psychologist, Addiction (Substance Use Disorder)",
            "state": "WA",
            "license": "PY00002443",
            "primary": false
        },
        {
            "code": "103TB0200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Cognitive & Behavioral",
            "state": "WA",
            "license": "PY00002443",
            "primary": true
        },
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "WA",
            "license": "PY00002443",
            "primary": false
        },
        {
            "code": "103TC2200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical Child & Adolescent",
            "state": "WA",
            "license": "PY00002443",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Stephen E. Sternbach, MD
• Steven Bromberg DC (Bromberg Chiropractic)
• Steven I. Brown DCPC
• Steven M Steinke Licsw LLC (Steven M Steinke LICSW)
• Ann M Stewart, NP
• Elyse Stewart, PHD
• Mark R Stewart, ED.D
• Sarah Stewart, PSY.D.
• Marie Stfleur
• Ashley Stiles, DPT

• Cognitive & Behavioral Psychologist in Cambridge, MA
• Providers in Cambridge, MA by specialty
• Cognitive & Behavioral Psychologist in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.