NPPES file of Aug 9, 2026

Hematology & Oncology Physician in Illinois

666 NPPES records list hematology & oncology physician with a practice address in Illinois, 5.3 per 100,000 residents, the 10th highest rate of 51. Chicago and Maywood have the most; each record links to the provider's NPI and the Illinois license search. Page 14 of 14.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RH0003X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Chicago has the most, 231

  1. Chicago231
  2. Maywood44
  3. Springfield31
  4. Park Ridge25
  5. Peoria24

Hematology & Oncology Physician records in Illinois

  1. Erol Yorulmazoglu, M.D.Elk Grove Village, IL 600071689635856
  2. Saadia Yunus, D.O.Lisle, IL 605321790808657
  3. Usman Zaheer, DORomeoville, IL 604461104319383
  4. Syed Zahir, M.D.Elgin, IL 601231538156732
  5. Fawwad Zaidi, M.D.Huntley, IL 601421881924702
  6. Ghassan Zalzaleh, MDOak Lawn, IL 604531992704035
  7. Abdulrazzak Zarifa, MDChicago, IL 606121629603139
  8. Viktoriya Zelikson, MDChicago, IL 606111538819974
  9. Jeremy Zhang, MDChicago, IL 606121477139822
  10. Kevin Zhang, M.D.Zion, IL 600991275030256
  11. Wei Zhao, MDChicago, IL 606371033670906
  12. Yujie Zhao, MD PHDUrbana, IL 618011316153034
  13. Yirong Zhu, D.O., PH.D.Rolling Meadows, IL 600081790226116
  14. William Zimmer, M.D.Springfield, IL 627011275575821
  15. Todd Zimmerman, MDBurr Ridge, IL 605271386707800
  16. Olga Zuk, M.D.Chicago, IL 606251326046681

Source: CMS NPPES, primary taxonomy 207RH0003X: records by practice city and the list of records, file of Aug 9, 2026.

Illinois ranks 10 of 51 per resident

  1. Maine5.5
  2. Connecticut5.5
  3. New Hampshire5.4
  4. Illinois5.3
  5. Maryland5.1
  6. Wisconsin5.0
  7. 50 states and D.C.4.2

Source: CMS NPPES, primary taxonomy 207RH0003X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

83.8% of these records appear in a Medicare file, against 82.9% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. Illinois83.8%
  2. United States82.9%

Hematology & Oncology Physician records in Illinois, measured

  • In a Medicare file558 of 666 · 83.8% here, 82.9% nationally
  • In the CMS Doctors and Clinicians file461 · 69.2% here, 71.3% nationally
  • Not updated in five years or more324 · 48.6% here, 54.3% nationally
  • Median graduation year2003 · the 461 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RH0003X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

666 NPPES records list hematology & oncology physician (207RH0003X) as their primary taxonomy with a practice address in Illinois: 5.3 per 100,000 residents against 4.2 nationally (50 states and D.C.). Chicago has 231 of them (35%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Pennsylvania784
  2. Florida818
  3. Ohio513
  4. Washington476

States with a similar rate per 100,000

  1. New Hampshire5.4
  2. Connecticut5.5
  3. Maryland5.1
  4. Maine5.5

The largest states

  1. California1,583
  2. New York1,163
  3. Texas922
  4. Florida818
  5. Pennsylvania784

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.