Nithin Karnan, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

R-13421 Issued in IA

Practice address

1010 4TH St SW
Suite 305
Mason City, IA 50401-2856

Phone

(641) 428-5700

NPI assigned

Jul 8, 2025

Last updated

Jul 8, 2025By the provider in NPPES

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

Medicare fee-for-service enrollment

Enrolled in IA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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

{
    "created_epoch": "1751932800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751932800000",
    "number": "1639069099",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1010 4TH ST SW",
            "address_2": "SUITE 305",
            "city": "MASON CITY",
            "state": "IA",
            "postal_code": "504012856"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1010 4TH ST SW",
            "address_2": "SUITE 305",
            "city": "MASON CITY",
            "state": "IA",
            "postal_code": "504012856",
            "telephone_number": "641-428-5700"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KARNAN",
        "first_name": "NITHIN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-07-08",
        "last_updated": "2025-07-08",
        "certification_date": "2025-07-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IA",
            "license": "R-13421",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Internal Medicine Physician in Mason City, IA
• Providers in Mason City, IA by specialty
• Internal Medicine Physician in Iowa

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 8, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.