Yosselyn Fernandez

Primary specialty

Behavior TechnicianTaxonomy code 106S00000X

Practice address

490 Chadbourne Rd Ste A131
Fairfield, CA 94534-1862

Phone

(707) 341-9949

NPI assigned

Apr 7, 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

Practice roles

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Nexus Therapies LLC

  • Early Intervention Provider Agency
  • Fairfield, CA
  • NPI 1831752781
  NPD (past)

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

{
    "created_epoch": "1775520000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775520000000",
    "number": "1215879564",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "490 CHADBOURNE RD STE A131",
            "city": "FAIRFIELD",
            "state": "CA",
            "postal_code": "945341862"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "490 CHADBOURNE RD STE A131",
            "city": "FAIRFIELD",
            "state": "CA",
            "postal_code": "945341862",
            "telephone_number": "707-341-9949"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FERNANDEZ",
        "first_name": "YOSSELYN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2026-04-07",
        "last_updated": "2026-04-07",
        "certification_date": "2026-04-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "106S00000X",
            "taxonomy_group": "",
            "desc": "Behavior Technician",
            "state": "CA",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Cassidy Ferguson
• Elizabeth W. Fernandes, MD
• Angelina Fernandez
• Terrelyn C Fernandez, PA
• Yasmeen Fernandez
• Leah Ferrell
• Daniel P Ferrick, M.D.
• Carl Leonard Fessenden, CADC-II
• Julie Ann Fessenden, MFT
• Ashley Gabriela Fiel

• Behavior Technician in Fairfield, CA
• Providers in Fairfield, CA by specialty
• Behavior Technician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 7, 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.