Patrick Mathiasen MD

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

Legal business name

PATRICK MATHIASEN MD

Practice address

10203 NE 29TH PL
Bellevue, WA 98004-1935

Phone

(425) 628-3660

NPI assigned

May 19, 2026

Organization subpart

No

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

Authorized official

Name

Patrick Leroy Mathiasen, MDNPI 1316962145

Title

Owner

Phone

(425) 628-3660

Specialties & licenses 1

Addresses

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Patrick Leroy Mathiasen, MD

  • Psychiatry Physician
  • Bellevue, WA
  • NPI 1316962145
  NPD Authorized official

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

{
    "created_epoch": "1779148800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1779148800000",
    "number": "1063342590",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "10203 NE 29TH PL",
            "city": "BELLEVUE",
            "state": "WA",
            "postal_code": "980041935",
            "telephone_number": "425-628-3660"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10203 NE 29TH PL",
            "city": "BELLEVUE",
            "state": "WA",
            "postal_code": "980041935",
            "telephone_number": "425-628-3660"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "PATRICK MATHIASEN MD",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-05-19",
        "last_updated": "2026-05-19",
        "certification_date": "2026-05-19",
        "status": "A",
        "authorized_official_last_name": "MATHIASEN",
        "authorized_official_first_name": "PATRICK",
        "authorized_official_middle_name": "LEROY",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "425-628-3660",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Pathology Associates Medical Laboratories, LLC (Paml)
• Sumathy T Pathy, M.D.
• Patricia a Martin MD PLLC
• Patricia K. Youngman, Inc. (Best CogniCare)
• Patricia L Paddison, MD, PLLC
• Patrick Phan, M.D., P.S.
• Ross Patrick, DO
• Gina Marie Patrito, M.D.
• Natasha Vernice Patterson, ACNS-BC
• Shanna R Patterson, LMP

• Psychiatry Physician in Bellevue, WA
• Providers in Bellevue, WA by specialty
• Psychiatry Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 19, 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.