Jennifer Mayfield

Primary specialty

Student in an Organized Health Care Education/Training ProgramTaxonomy code 390200000X

Practice address

1866 B St Ste 101
Hayward, CA 94541-3184

Phone

(510) 935-6211

NPI assigned

Apr 21, 2025

Sex

Female

Sole proprietor

No

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

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.

• Horizon Services, Inc

  • Children's Substance Abuse Rehabilitation Facility
  • Hayward, CA
  • NPI 1114104411
  NPD (past)

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

{
    "created_epoch": "1745193600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757289600000",
    "number": "1255128583",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1866 B ST STE 101",
            "city": "HAYWARD",
            "state": "CA",
            "postal_code": "945413184",
            "telephone_number": "510-935-6211"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1866 B ST STE 101",
            "city": "HAYWARD",
            "state": "CA",
            "postal_code": "945413184",
            "telephone_number": "510-935-6211"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MAYFIELD",
        "first_name": "JENNIFER",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-04-21",
        "last_updated": "2025-09-08",
        "certification_date": "2025-09-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YA0400X",
            "taxonomy_group": "",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "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": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Michael Matt, OT
• Natasha Matta
• Phatima Matthews
• Hine Maumalanga
• Lara Maxey, MPA
• Ryan Maynard
• Camille Mayo
• Brittany Mayorga
• Karin Karin Mazariegos Mazariegos
• Laure F. Mazzara, MD

• Student in an Organized Health Care Education/Training Program in Hayward, CA
• Providers in Hayward, CA by specialty
• Student in an Organized Health Care Education/Training Program in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 8, 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.