NPPES file of Aug 9, 2026

Medical Oncology Physician in Illinois

182 NPPES records list medical oncology physician with a practice address in Illinois, 1.5 per 100,000 residents, the 24th highest rate of 51. Chicago and Evanston have the most; each record links to the provider's NPI and the Illinois license search. Page 4 of 4.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RX0202X · 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, 82

  1. Chicago82
  2. Evanston18
  3. Rockford8
  4. Urbana5
  5. Glenview4

Medical Oncology Physician records in Illinois

  1. Sabet Siddiqui, M.D.Dekalb, IL 601151598819575
  2. Robert Siegel, MDAlton, IL 620021518901545
  3. Mehmet Sipahi, MDBourbonnais, IL 609141467556837
  4. Michael Soble, M.D.Barrington, IL 600101134101025
  5. Jeffrey Sosman, MDChicago, IL 606111699862706
  6. Carolina Soto Chervin, M.D. PH.D.Evanston, IL 602011750778924
  7. David Spector, MDMoline, IL 612651891754404
  8. Shylendra Sreenivasappa, M.D.Rockford, IL 611081972706604
  9. Gary Steinecker, MDOak Lawn, IL 604531699880872
  10. Revathi Suppiah, M.D.Aurora, IL 605061760644116
  11. April Swoboda, MDChicago, IL 606371922327535
  12. Deimante Tamkus, M.D.Chicago, IL 606121881624906
  13. Angelica Tolentino, D.O.Tinley Park, IL 604871417163312
  14. Dean Tsarwhas, M.D.Lake Forest, IL 600451093797987
  15. Lydia Usha, M.D.Chicago, IL 606121336109693
  16. Bhanu Vakkalanka, M.D.Normal, IL 617611578766796
  17. David Vanderweele, M.D.Chicago, IL 606111689846834
  18. Vamsi Vasireddy, DOUrbana, IL 618011801802996
  19. Mario Velasco, MDDecatur, IL 625261326007782
  20. John Visconti, DOShiloh, IL 622691033167846
  21. Everett VokesChicago, IL 606371932262458
  22. Jamie Vonroenn, MDChicago, IL 606111558378182
  23. Elaine Wade, MDGlenview, IL 600261093752990
  24. James Wade, M.D.Decatur, IL 625261992774459
  25. James WallaceChicago, IL 606371669687307
  26. James Ward, M.D.Evanston, IL 602011609812825
  27. Richard Warren, MDChicago, IL 606171013981349
  28. Sigmund Weitzman, MDChicago, IL 606111144249764
  29. Osvaldo Wesly, MDSpringfield, IL 627041356441943
  30. Thomas Westbrook, MDChicago, IL 606071346760493
  31. Thomas Weyburn, D.O.Crystal Lake, IL 600141487636478
  32. Mehmet Murat Zerey, MDChicago, IL 606111427942283

Source: CMS NPPES, primary taxonomy 207RX0202X: records by practice city and the list of records, file of Aug 9, 2026.

Illinois ranks 24 of 51 per resident

  1. Tennessee1.6
  2. Maine1.6
  3. New Jersey1.5
  4. Illinois1.5
  5. Ohio1.4
  6. Utah1.3
  7. 50 states and D.C.1.7

Source: CMS NPPES, primary taxonomy 207RX0202X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

83.0% of these records appear in a Medicare file, against 81.8% 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. Illinois83.0%
  2. United States81.8%

Medical Oncology Physician records in Illinois, measured

  • In a Medicare file151 of 182 · 83.0% here, 81.8% nationally
  • In the CMS Doctors and Clinicians file132 · 72.5% here, 72.5% nationally
  • Not updated in five years or more94 · 51.6% here, 49.3% nationally
  • Median graduation year2000 · the 132 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RX0202X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

182 NPPES records list medical oncology physician (207RX0202X) as their primary taxonomy with a practice address in Illinois: 1.5 per 100,000 residents against 1.7 nationally (50 states and D.C.). Chicago has 82 of them (45%).

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. Washington183
  2. Michigan177
  3. North Carolina191
  4. Ohio169

States with a similar rate per 100,000

  1. New Jersey1.5
  2. Utah1.3
  3. Maine1.6
  4. Kentucky1.3

The largest states

  1. Florida561
  2. New York548
  3. Texas547
  4. California447
  5. Massachusetts421

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.