WILLIAM JACOB DIETER
NPI 1891572533
Radiology - Radiation Oncology in Chicago, IL

Q: What is William Dieter's NPI number?

The NPI number for William Dieter is 1891572533. It was assigned to this individual provider in the NPPES registry on September 14, 2023.

Q: What is William Dieter's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Q: When was this NPI record last updated?

The NPPES record for William Dieter was last updated on August 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since September 14, 2023PECOS Enrolled

1520 W HARRISON ST, CHICAGO, IL 60607(312) 942-0712 Get Directions Write a Review

NPPES record last updated: August 5, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Aug 5, 2025, Jun 25, 2025 (2 updates tracked since 2025).

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About William Jacob Dieter NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM JACOB DIETER (NPI 1891572533) is an individual radiation oncology provider in Chicago, Illinois, licensed in Illinois (125086179) and active in the NPI registry since September 2023. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1891572533

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameWILLIAM JACOB DIETER

Location Address1520 W HARRISON STChicago, IL 60607-3106

Mailing Address1520 W Harrison StChicago, IL 60607-3106

Phone(312) 942-0712

Sole ProprietorYes

Enumeration DateSeptember 14, 2023

Last NPPES UpdateAugust 5, 20252 updates tracked since enumeration

NPPES CertifiedAugust 5, 2025

✔ NPI 1891572533 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

License✔ Licensed in IL · 125086179

Definition

A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X · License 125.086179 (IL)

1520 W HARRISON ST, Chicago, IL 60607

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Jacob Dieter is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60607 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$183.39 typical visit price

range $60.08 – $183.39

Typical copayment $45.84 (range $15.02 – $45.84)

Most-billed visit code 99205

Established Patient

$74.80 typical visit price

range $18.97 – $148.12

Typical copayment $18.70 (range $4.74 – $37.03)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

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