Claire Niewiara, MD

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

125085666 Issued in IL

Practice address

2160 S 1St Ave
Maywood, IL 60153-3328

Phone

(708) 216-2729

NPI assigned

Apr 2, 2025

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

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.

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1743552000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779235200000",
    "number": "1487458113",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2160 S 1ST AVE",
            "city": "MAYWOOD",
            "state": "IL",
            "postal_code": "601533328"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2160 S 1ST AVE",
            "city": "MAYWOOD",
            "state": "IL",
            "postal_code": "601533328",
            "telephone_number": "708-216-2729"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NIEWIARA",
        "first_name": "CLAIRE",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-04-02",
        "last_updated": "2026-05-20",
        "certification_date": "2026-05-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "IL",
            "license": "125085666",
            "primary": true
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "125.085666",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Vivian Nguyen, DO
• Nicholas R Tokarski DDS PC
• Brian Nickoloff, MD PHD
• Magan Rae Nielsen, ANP-BC
• Kathryn Elizabeth Niemeyer, M.D.
• Mira Nigudkar, BS
• Petar Nikolic, MD
• Matthew M Nobari, MD
• Nelly Prescilla Norrell, MD
• Isabella Mary North, DPM

• Radiation Oncology Physician in Maywood, IL
• Providers in Maywood, IL by specialty
• Radiation Oncology Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 20, 2026; 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.