Kelsey Theresa O'Brien

Primary specialty

Rehabilitation PractitionerTaxonomy code 225400000X

Practice address

920 Grand Ave
San Rafael, CA 94901-3506

Phone

(415) 861-0828

NPI assigned

Aug 4, 2020

Sex

Female

Sole proprietor

No

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)

Not enrolled

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

{
    "created_epoch": "1596499200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758067200000",
    "number": "1679183693",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "368 FELL ST",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941025144",
            "telephone_number": "415-861-0828"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "920 GRAND AVE",
            "city": "SAN RAFAEL",
            "state": "CA",
            "postal_code": "949013506",
            "telephone_number": "415-861-0828"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "50 Shrader St",
            "address_purpose": "LOCATION",
            "city": "San Francisco",
            "state": "CA",
            "postal_code": "941171015",
            "country_code": "US",
            "telephone_number": "082-841-5861",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "KELSEY",
        "middle_name": "THERESA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-08-04",
        "last_updated": "2025-09-17",
        "certification_date": "2025-09-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101Y00000X",
            "taxonomy_group": "",
            "desc": "Counselor",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "225400000X",
            "taxonomy_group": "",
            "desc": "Rehabilitation Practitioner",
            "state": "CA",
            "license": null,
            "primary": true
        },
        {
            "code": "172V00000X",
            "taxonomy_group": "",
            "desc": "Community Health Worker",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• NP Plus, LLC
• Debra Nunes
• Lupe Marquez Nunez, LCSW
• Marcella Angela Nutting
• Rebecca R. Nystrom, D.C.
• O'Byrne & Associates
• Matthew O'Byrne, PH.D.
• Robynne O'Byrne, PH.D.
• Leslie Ann O'Connell, PH.D.
• Karen R O'Dea, LPC

• Rehabilitation Practitioner in San Rafael, CA
• Providers in San Rafael, CA by specialty
• Rehabilitation Practitioner in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 17, 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.