William Jacob Dieter

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

125086179 Issued in IL

Practice address

1520 W Harrison St
Chicago, IL 60607-3106

Phone

(312) 942-0712

NPI assigned

Sep 14, 2023

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in TN

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

State licenses

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

{
    "created_epoch": "1694649600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1754352000000",
    "number": "1891572533",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1520 W HARRISON ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606073106"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1520 W HARRISON ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606073106",
            "telephone_number": "312-942-0712"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIETER",
        "first_name": "WILLIAM",
        "middle_name": "JACOB",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2023-09-14",
        "last_updated": "2025-08-05",
        "certification_date": "2025-08-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "IL",
            "license": "125.086179",
            "primary": false
        },
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "IL",
            "license": "125086179",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mary Kathryn Dierks, MD
• Janice Dieschbourg, M.D.
• James R Diesfeld, M.D.
• Zachary Dietch
• Jessica Dieter
• James D Dieterich, MD
• Malissa/Lisa Lynn Dieterle, LCPC; CADC
• Jessica Marie Diethelm, M.D.
• Dietitians at Home Inc
• Dietitians at Home Therapeutic Shoes, LLC

• Radiation Oncology Physician in Chicago, IL
• Providers in Chicago, 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 Aug 5, 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.