John J Mizenko, D.O.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

34001263M Issued in OH

Practice address

4100 Warrensville Center Rd
Suite 203
Warrensville Heights, OH 44122-7024

Phone

(216) 561-0801

NPI assigned

Aug 9, 2005

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

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Osteopathy

State licenses

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

{
    "created_epoch": "1123545600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1417958703",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4100 WARRENSVILLE CENTER RD",
            "address_2": "SUITE 203",
            "city": "WARRENSVILLE HEIGHTS",
            "state": "OH",
            "postal_code": "441227024",
            "telephone_number": "216-561-0801"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4100 WARRENSVILLE CENTER RD",
            "address_2": "SUITE 203",
            "city": "WARRENSVILLE HEIGHTS",
            "state": "OH",
            "postal_code": "441227024",
            "telephone_number": "216-561-0801"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MIZENKO",
        "first_name": "JOHN",
        "middle_name": "J",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-08-09",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "OH",
            "license": "34001263M",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "0089961",
            "state": "OH"
        }
    ],
    "endpoints": [],
    "other_names": []
}

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• Gastroenterology Physician in Warrensville Heights, OH
• Providers in Warrensville Heights, OH by specialty
• Gastroenterology Physician in Ohio

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.