Karen D Mahan

Primary specialty

School CounselorTaxonomy code 101YS0200X

Practice address

4700 Sand Creek Road
Antioch, CA 94531

Phone

(925) 779-7540

Fax

(925) 779-7542

NPI assigned

Oct 1, 2025

Sex

Female

Sole proprietor

Yes

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

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

{
    "created_epoch": "1759276800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1759276800000",
    "number": "1992679039",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4700 SAND CREEK ROAD",
            "city": "ANTIOCH",
            "state": "CA",
            "postal_code": "94531",
            "telephone_number": "925-779-7540",
            "fax_number": "925-779-7542"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4700 SAND CREEK ROAD",
            "city": "ANTIOCH",
            "state": "CA",
            "postal_code": "94531",
            "telephone_number": "925-779-7540",
            "fax_number": "925-779-7542"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MAHAN",
        "first_name": "KAREN",
        "middle_name": "D",
        "name_prefix": "Ms.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2025-10-01",
        "last_updated": "2025-10-01",
        "certification_date": "2025-09-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YS0200X",
            "taxonomy_group": "",
            "desc": "Counselor, School",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lauren Elizabeth Madlock, PSYD
• Kristen Leigh Madrid
• Lewelyn Madrigal
• Sherwin Magalued, LVN
• Nympha Magat, PTA
• Elina Maharjan, FNP-BC
• Abbas Mahdavi, MD
• Anthony Maher, PHARM.D.
• Marjo Ignacio Malano, PHYSICAL THERAPIST
• Beverly Miriam Maldonado, CNM

• School Counselor in Antioch, CA
• Providers in Antioch, CA by specialty
• School Counselor in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 1, 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.