Sebastien Michel Castelain

Primary specialty

Adult Psychiatric/Mental Health Registered NurseTaxonomy code 163WP0809X

License

95082750 Issued in CA

Practice address

1700 S Amphlett Blvd Ste 120
San Mateo, CA 94402-2711

Phone

(650) 683-0971

NPI assigned

Jun 24, 2016

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

State licenses

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

{
    "created_epoch": "1466726400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771372800000",
    "number": "1407207038",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1700 S AMPHLETT BLVD STE 120",
            "city": "SAN MATEO",
            "state": "CA",
            "postal_code": "944022711",
            "telephone_number": "650-683-0971"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1700 S AMPHLETT BLVD STE 120",
            "city": "SAN MATEO",
            "state": "CA",
            "postal_code": "944022711",
            "telephone_number": "650-683-0971"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CASTELAIN",
        "first_name": "SEBASTIEN",
        "middle_name": "MICHEL",
        "name_prefix": "Mr.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-06-24",
        "last_updated": "2026-02-18",
        "certification_date": "2026-02-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163WP0809X",
            "taxonomy_group": "",
            "desc": "Registered Nurse, Psychiatric/Mental Health, Adult",
            "state": "CA",
            "license": "95082750",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Julia Caserta
• Elizabeth Casey
• Lelis Casil
• Aysha Cassidy
• Ari-Asha Castalia, MFT
• Celina Castellano, MACP/MFT INTERN
• Nicholas Melchior Castellanos Jr.
• Amanda Castelli
• Daisy Castillo
• Gloria Alejandra Castillo, MSW

• Adult Psychiatric/Mental Health Registered Nurse in San Mateo, CA
• Providers in San Mateo, CA by specialty
• Adult Psychiatric/Mental Health Registered Nurse in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 18, 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.