Katherine Massiel Hernandez Mendez, MD

Primary specialty

Pediatrics PhysicianTaxonomy code 208000000X

License

ME83275 Issued in FL

Practice address

5851 Saint Augustine Rd
Jacksonville, FL 32207-8015

Phone

(904) 396-3964

Fax

(904) 396-0128

NPI assigned

Apr 3, 2023

Reactivated

Dec 30, 2025

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

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1680480000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787702400000",
    "number": "1790480465",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1300 HENDRICKS AVE",
            "city": "JACKSONVILLE",
            "state": "FL",
            "postal_code": "322078680",
            "telephone_number": "856-807-7442"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5851 SAINT AUGUSTINE RD",
            "city": "JACKSONVILLE",
            "state": "FL",
            "postal_code": "322078015",
            "telephone_number": "904-396-3964",
            "fax_number": "904-396-0128"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HERNANDEZ MENDEZ",
        "first_name": "KATHERINE",
        "middle_name": "MASSIEL",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-04-03",
        "last_updated": "2026-08-26",
        "certification_date": "2026-08-26",
        "deactivation_date": "2023-11-06",
        "reactivation_date": "2025-12-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "FL",
            "license": "ME83275",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jose E Hernandez Fernandez
• Olivia Hernandez Gonzalez
• Britney Michelle Hernandez Grijalba
• Dayana Hernandez Hernandez
• Francisco Javier Hernandez Iglesias, IDC
• Yanet Hernandez Perez, RBT-25-409463
• Sonia I Hernandez Rivera, PH.D.
• Yadilis Hernandez Rodriguez
• Yocelin Hernandez Rojero
• Jackelin Hernandez Sanchez

• Pediatrics Physician in Jacksonville, FL
• Providers in Jacksonville, FL by specialty
• Pediatrics Physician in Florida

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 26, 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.