NPPES file of Aug 9, 2026

Internal Medicine Physician in Illinois

7,238 NPPES records list internal medicine physician with a practice address in Illinois, 58 per 100,000 residents, the 9th highest rate of 51. Chicago and Maywood have the most; each record links to the provider's NPI and the Illinois license search. Page 144 of 145.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · 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, 2,867

  1. Chicago2,867
  2. Maywood257
  3. Springfield196
  4. Evanston178
  5. Oak Lawn173

Internal Medicine Physician records in Illinois

  1. Muhammad Zafar, MDFlanagan, IL 617401811985856
  2. Muhammad Faizan Zafar, MDBerwyn, IL 604021770329518
  3. Hassan ZagloulMaywood, IL 601531043009491
  4. Mohammad Zaheerullah, M.D.Evanston, IL 602021669622809
  5. Eli Zaher, MDChicago, IL 606571154054690
  6. Jasmine Zahid, DOMaywood, IL 601531700527595
  7. Onain Zahid, MDMaywood, IL 601531295401479
  8. Rabia Zahid, DOMount Vernon, IL 628641346734043
  9. Syed Zahir, D.O.Olympia Fields, IL 604611649666900
  10. Merrill Zahtz, M.D.Chicago, IL 606591225097819
  11. Jordan Zaid, MDChicago, IL 606121679036859
  12. Roa ZaiedOak Lawn, IL 604531093276495
  13. Dorothy Zajac, MDChester, IL 622331972592210
  14. Mhd Firas Zakaria, M.D.Palos Heights, IL 604631912218272
  15. Jennifer Zakko, MDChicago, IL 606111619468428
  16. Urvi ZalaBerwyn, IL 604021053159905
  17. Ned Zallik, M.D.Bannockburn, IL 600151760477889
  18. Asad Zaman, M.D.Tinley Park, IL 604771780636944
  19. Mohammad Zaman, MDBurr Ridge, IL 605271346350196
  20. Mohammad Uzair Zaman, MBBS, MRCPIUrbana, IL 618011992623946
  21. Shahrear Zaman, M.D.Springfield, IL 627811265859128
  22. Penka Zamfirova, M.D.Chicago, IL 607071275616914
  23. Moshe Zamir, M.D.Elgin, IL 601201760560775
  24. Nancy Zamora, MDChicago, IL 606421114012663
  25. Alison Zander, MDMaywood, IL 601531972205243
  26. Claude Zanetti, MDChgo, IL 606251508925041
  27. Olga Zarkh, MDBuffalo Grove, IL 600891043282320
  28. Barbara Zarnecki, M.D.Chicago, IL 606101508833575
  29. Oskar Zarnowski, DOPark Ridge, IL 600681750084893
  30. Patricia Zarza, M.D.Chicago, IL 606121821736240
  31. Thomas Zatorski, MDWilmette, IL 600911124134580
  32. Gilberto Zavala, MDChicago, IL 606121699700872
  33. Luygy Zavaleta Jara, M.D.Chicago, IL 606121336435866
  34. Raymon Zaya, MDNiles, IL 607141467943308
  35. Mayer Zayan, M.D.Northbrook, IL 600621619064151
  36. Dmitri Zbarsky, M.D.Chicago, IL 606081114412970
  37. Shadi Zbeidi, DOPark Ridge, IL 600681174318083
  38. Vesna Zecevic-Sternic, MDChicago, IL 606311811948185
  39. Tharanum Zehra, M.D.Burbank, IL 604591205013588
  40. Brittany Zelch, MDMaywood, IL 601531104677723
  41. Michelle Zeng, M.DChicago, IL 606161255665444
  42. Natalia Zero, DOOak Lawn, IL 604531659995231
  43. Yonatan Zewdie, MDRiverside, IL 605461558288589
  44. Lily Zexter, MDChicago, IL 606121417756925
  45. Kirill Zhadovich, M.D.Niles, IL 607141003881699
  46. Cecilia ZhangEvanston, IL 602011821522319
  47. Helen ZhangChicago, IL 606121033797782
  48. Jasmine ZhangChicago, IL 606121700674744
  49. Jessica Zhang, MDChicago, IL 606111518661586
  50. Kaiyuan Zhang, MD.Chicago, IL 606081679358386

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

Illinois ranks 9 of 51 per resident

  1. Hawaii63
  2. New York62
  3. Delaware58
  4. Illinois58
  5. Michigan57
  6. Pennsylvania56
  7. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

72.5% of these records appear in a Medicare file, against 78.7% 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. Illinois72.5%
  2. United States78.7%

Internal Medicine Physician records in Illinois, measured

  • In a Medicare file5,251 of 7,238 · 72.5% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file3,584 · 49.5% here, 61.4% nationally
  • Not updated in five years or more3,434 · 47.4% here, 55.4% nationally
  • Median graduation year2003 · the 3,580 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

7,238 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in Illinois: 58 per 100,000 residents against 44 nationally (50 states and D.C.). Chicago has 2,867 of them (40%).

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. Pennsylvania7,300
  2. Massachusetts6,825
  3. Michigan5,735
  4. Texas9,175

States with a similar rate per 100,000

  1. Delaware58.1
  2. New York61.7
  3. Hawaii62.9
  4. Maryland63.2

The largest states

  1. California17,696
  2. New York12,067
  3. Florida10,151
  4. Texas9,175
  5. Pennsylvania7,300

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.