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 142 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. Andrew Wunderlich, M.D.Joliet, IL 604351275528341
  2. Kristin Wurzburger, MDAledo, IL 612311902892805
  3. Alan Wurzelbacher, M.D.Elgin, IL 601231457573347
  4. Sarah WyckoffChicago, IL 606111881340735
  5. Joseph Wynne, M.D.Chicago, IL 606371710325519
  6. Joseph Wyse, MDSkokie, IL 600771669436747
  7. John Xanthopoulos, M.D.North Chicago, IL 600641306948971
  8. Eric Xia, DOEvanston, IL 602011568108934
  9. Bingtao XiangChicago, IL 606121346091568
  10. Xiangyu Xie, MDChicago, IL 606121538664446
  11. Chang Xu, DOChicago, IL 606121528762333
  12. Rong XuChicago, IL 606121992963243
  13. Xiaoping Xu, M.D.Hinsdale, IL 605211700988607
  14. Fabrice Yabit, M.D.McHenry, IL 600501922795533
  15. David Yablonsky, D.O.Edwardsville, IL 620251780665901
  16. Assy Yacoub, D.O.Scott Afb, IL 622251760478234
  17. Manajyoti Yadav, M.D.Peoria, IL 616371932470044
  18. Mukesh Yadav, MDUrbana, IL 618011578927125
  19. Reena YadavPark Ridge, IL 600681326928276
  20. Pratyusha Yadavalli, M.D.Oak Lawn, IL 604531306208418
  21. Greg Yahiro, MDDowners Grove, IL 605151457312282
  22. Sarat Yalamanchili, M.D.Bourbonnais, IL 609141194722942
  23. Ramaraja Yalavarthi, M.D.New Lenox, IL 604511699739474
  24. Rathna Yallapragada, M.D.Willowbrook, IL 605271366455529
  25. Jessica YamadaChicago, IL 606371346942190
  26. Naser Yamani, MDChicago, IL 606121578871497
  27. Gayatri Yambem, M.D.Urbana, IL 618011093066748
  28. Yu Yan, M.D.Arlington Heights, IL 600051124380753
  29. Bryan Yanaga, MDMaywood, IL 601531346214459
  30. Anusha Yanamadala, M.DRockford, IL 611141174978027
  31. Chang Yang, M.D.Elmhurst, IL 601261902219611
  32. Eunyoung Yang, M.DUrbana, IL 618011366729089
  33. Haohua Yang, MDYorkville, IL 605601184668048
  34. Lee-Ann Yang, MDMaywood, IL 601531457326332
  35. Shumeng YangMaywood, IL 601531962203885
  36. Sijun Yang, MDBolingbrook, IL 604401962653568
  37. Christopher YaoChicago, IL 606571013611730
  38. Rebecca Yao, MDChicago, IL 606371093393134
  39. Tammy Yao-Hong, D.O.Evanston, IL 602011801108261
  40. Hasan Yaqub, DOUrbana, IL 618011063086387
  41. Naila Yaseen, DOChicago, IL 606161952982308
  42. Valeria Yashina, M.D.Schaumburg, IL 601731861405078
  43. Mohamed Yasin, M.DChicago, IL 606121740076231
  44. Owais Yasin, MDElgin, IL 601231487150389
  45. Mahmoud Yassin, M.D.Robinson, IL 624541518028281
  46. Samer Yassin, MDChicago, IL 606111689434706
  47. Judith Yasunaga, MDChampaign, IL 618221770784837
  48. Seth Yates, DOSpringfield, IL 627021033805999
  49. Thomas Yates, MDChicago, IL 606371861920779
  50. Dina YazdaniElgin, IL 601231649730672

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.