NPPES file of Aug 9, 2026

Diagnostic Radiology Physician in Illinois

1,874 NPPES records list diagnostic radiology physician with a practice address in Illinois, 15 per 100,000 residents, the 11th highest rate of 51. Chicago and Springfield have the most; each record links to the provider's NPI and the Illinois license search. Page 25 of 38.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2085R0202X · 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, 599

  1. Chicago599
  2. Springfield129
  3. Maywood113
  4. Evanston85
  5. Peoria75

Diagnostic Radiology Physician records in Illinois

  1. Howard O'Neil, M.D.Downers Grove, IL 605151194701730
  2. James Oakey, MDLombard, IL 601481902873375
  3. Ademola Obajuluwa, M.D.Chicago, IL 606121922365105
  4. Piotr Obara, M.D.Evanston, IL 602011730322298
  5. Jasmina Oberhaus, DOLibertyville, IL 600481376569731
  6. Evan Oblonsky, M.D.Arlington Heights, IL 600041023019973
  7. Iclal Ocak, MDChicago, IL 606371790969400
  8. Timothy Oconnell, MDClarendon Hills, IL 605141194766618
  9. Rita Odegaard, M.D.Maywood, IL 601531811927361
  10. Crystal OehmenOak Lawn, IL 604531396350708
  11. Quincy Ogbogu, MDChicago, IL 606371689255325
  12. David Okrent, M.D.Park Ridge, IL 600681306846472
  13. William Okuno, M.D.Park Ridge, IL 600681861492928
  14. John OlivieriMaywood, IL 601531619430675
  15. Donald Olofsson, D.O.Sycamore, IL 601781124057047
  16. Mary Olson, MDMaywood, IL 601531942287818
  17. Imran Omar, MDChicago, IL 606111154354801
  18. Seng Ong, MDChicago, IL 606371861441693
  19. Douglas OnuscheckSpringfield, IL 627031952763559
  20. Judith Operchal, M.D.Hinsdale, IL 605211083635874
  21. Aaron Oraham, MDMaywood, IL 601531386222735
  22. Justin Ord, M.D.Palos Heights, IL 604631770745846
  23. Nisa Oren, MDChicago, IL 606371962924902
  24. Sarah Orrin, M.D.Chicago, IL 606371548595101
  25. Robert Ortega, MDMcHenry, IL 600501730178781
  26. Mohammed Osmani, DOPark Ridge, IL 600681093212219
  27. Gregory Ostrowski, DOPalos Heights, IL 604631417938143
  28. Aytekin OtoChicago, IL 606371528142866
  29. Monica Owerczuk, D.O.Park Ridge, IL 600681215200472
  30. Burce Ozgen Mocan, M.D.Chicago, IL 606121043678899
  31. Onural Ozturk, MDChicago, IL 606111861185712
  32. Durga Pai, M.D.Champaign, IL 618201164639985
  33. Eugene Pai, MDDes Plaines, IL 600161033157425
  34. Milton Paige, M.D.Highland Park, IL 600351952664906
  35. Aloyzas Pakalniskis, MDElmhurst, IL 601261821015678
  36. Alex Pallas, DOMcHenry, IL 600501235455262
  37. Robert Palmer, MDAurora, IL 605041942401021
  38. Spiro Panagakis, M.D.Joliet, IL 604321134197239
  39. Joseph Panella, MDGlenview, IL 600261346286242
  40. Willett Pang, MDSpringfield, IL 627041407813637
  41. Satnam Papa, M.D.Riverwoods, IL 600151760404958
  42. Steven Papagiannopoulos, MDNaperville, IL 605401689625063
  43. James Papesch, MDLibertyville, IL 600481164490066
  44. Patrick Para, DOGeneva, IL 601341114979036
  45. Keyur ParekhChicago, IL 606111891043162
  46. Nishant Parekh, M.D.Chicago, IL 606111598962169
  47. Nita Parekh, MDBarrington, IL 600051205045580
  48. Vincent Parenti, MDEvanston, IL 602011225597503
  49. Keval Parikh, MDChicago, IL 606111700314101
  50. Bennett Park, M.D.Hoffman Estates, IL 601941750486668

Source: CMS NPPES, primary taxonomy 2085R0202X: records by practice city and the list of records, file of Aug 9, 2026.

Illinois ranks 11 of 51 per resident

  1. New York16
  2. Michigan16
  3. Missouri16
  4. Illinois15
  5. New Hampshire14
  6. Maryland14
  7. 50 states and D.C.13

Source: CMS NPPES, primary taxonomy 2085R0202X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

71.3% of these records appear in a Medicare file, against 73.1% 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. Illinois71.3%
  2. United States73.1%

Diagnostic Radiology Physician records in Illinois, measured

  • In a Medicare file1,337 of 1,874 · 71.3% here, 73.1% nationally
  • In the CMS Doctors and Clinicians file1,202 · 64.1% here, 68.5% nationally
  • Not updated in five years or more813 · 43.4% here, 56.9% nationally
  • Median graduation year2004 · the 1,201 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2085R0202X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

1,874 NPPES records list diagnostic radiology physician (2085R0202X) as their primary taxonomy with a practice address in Illinois: 15 per 100,000 residents against 13 nationally (50 states and D.C.). Chicago has 599 of them (32%).

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. Minnesota1,700
  2. Massachusetts1,658
  3. Michigan1,584
  4. Ohio1,582

States with a similar rate per 100,000

  1. New Hampshire14.3
  2. Maryland14.2
  3. Missouri15.8
  4. New York16.1

The largest states

  1. California4,500
  2. New York3,146
  3. Texas3,124
  4. Florida2,761
  5. Pennsylvania2,199

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.