Matthew Bruce Duff

Primary specialty

PsychologistTaxonomy code 103T00000X

Practice address

195 NE Gilman Blvd Ste 100
Issaquah, WA 98027-2940

Phone

(425) 295-7697

NPI assigned

Oct 6, 2026

Last updated

Oct 6, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

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

{
    "created_epoch": "1791244800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1791244800000",
    "number": "1023912672",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "10908 57TH AVENUE CT E",
            "city": "PUYALLUP",
            "state": "WA",
            "postal_code": "983735716",
            "telephone_number": "425-281-9760"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "195 NE GILMAN BLVD STE 100",
            "city": "ISSAQUAH",
            "state": "WA",
            "postal_code": "980272940",
            "telephone_number": "425-295-7697"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DUFF",
        "first_name": "MATTHEW",
        "middle_name": "BRUCE",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2026-10-06",
        "last_updated": "2026-10-06",
        "certification_date": "2026-10-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lauren Jennifer Drum
• Bianca Druta
• Cherie Dubeau, LMP
• Rebecca L Duda, BSPT
• Silas Dickenson Dudley, DDS, MSD
• Amanda Duggan, RN, IBCLC
• Monee Dulay, DACM, LAC
• Philip Dunbar-Mayer, PSY.D.
• Chiwon Dunlap, RDH
• Carley Dunn, L.AC.

• Psychologist in Issaquah, WA
• Providers in Issaquah, WA by specialty
• Psychologist in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 6, 2026; 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.