Mary O'Brien, PHD

Primary specialty

Counseling PsychologistTaxonomy code 103TC1900X

Practice address

22525 SE 64TH PL
Issaquah, WA 98027-5383

Phone

(425) 269-3277

NPI assigned

Aug 10, 2026

Sex

Female

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": "1786320000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786320000000",
    "number": "1811812944",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4113A CHILBERG AVE SW",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981163574"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "22525 SE 64TH PL",
            "city": "ISSAQUAH",
            "state": "WA",
            "postal_code": "980275383",
            "telephone_number": "425-269-3277"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "MARY",
        "credential": "PHD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2026-08-10",
        "last_updated": "2026-08-10",
        "certification_date": "2026-08-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC1900X",
            "taxonomy_group": "",
            "desc": "Psychologist, Counseling",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Alison Novosel
• Summer Jo Nowicki, N.D.
• Allison Kathryn Nunn, PT, DPT
• Nurani, Mitchell, Kim, PC
• NW Eye Docs, Inc.
• Duncan Patrick O'Mahony, PSYCHOLOGIST
• Kaitlyn O'Neel, LSWAIC
• Johanna O'Neil, LMP
• Kari Ciaciuch O'Neill, LICSW
• Tracie O'Neill, MD

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 10, 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.