Isaac L Larson, RC1

Primary specialty

Adult CompanionTaxonomy code 372600000X

Practice address

5023 NE Killingsworth St
Portland, OR 97218-1915

Phone

(503) 402-8117

Fax

(503) 284-6585

NPI assigned

Feb 5, 2007

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

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": "1170633600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1144368655",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "605 SW BONITA RD",
            "address_2": "APT# K108",
            "city": "LAKE OSWEGO",
            "state": "OR",
            "postal_code": "97035",
            "telephone_number": "971-285-2673"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5023 NE KILLINGSWORTH ST",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972181915",
            "telephone_number": "503-402-8117",
            "fax_number": "503-284-6585"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LARSON",
        "first_name": "ISAAC",
        "middle_name": "L",
        "credential": "RC1",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-02-05",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "OR",
            "license": null,
            "primary": false
        },
        {
            "code": "372600000X",
            "taxonomy_group": "",
            "desc": "Adult Companion",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Erika Leslie Larson, QMHP-R
• Gabriel Larson, MD
• Ge'Nene Larson
• Heather Melissa Larson, MD
• Ilse A Larson, M.D.
• Jennifer Larson, MA
• Jonathan Mychal Larson
• Julie Ann Larson, LMFT
• Julie Anne Larson, RN-BSN
• Katherine Larson, D.V.M.

• Adult Companion in Portland, OR
• Providers in Portland, OR by specialty
• Adult Companion in Oregon

• 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.