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 33 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. Darrell Downs, MDPeoria, IL 616371639745318
  2. Amber Doyle, D.O.Carbondale, IL 629011992062178
  3. Jaroslaw Drag, M.D.Schaumburg, IL 601931609936954
  4. Roman Dreyer, MDAurora, IL 605041376576793
  5. Harshit DuaChicago, IL 606401871945485
  6. Samantha Duarte, MDChicago, IL 606111427606060
  7. Leonard Dubin, M.D.Melrose Park, IL 601601518976737
  8. Kerline Ductan, M.D.Normal, IL 617611073826715
  9. Janusz Dudek, MDChicago, IL 606301073531570
  10. Marta Dudek, M.D.Chicago, IL 606301083666432
  11. Hannah Duehren, MDChicago, IL 606371154940377
  12. Jeffrey Dugas, MDChicago, IL 606071760566954
  13. Ishveena Duggal, M.D.Chicago, IL 606111487943205
  14. Doran Duke, M.D.Schaumburg, IL 601931053671479
  15. Rebecca Duke, M.D.Chicago, IL 606341538272604
  16. David DulceEvanston, IL 602011093506032
  17. Henry Dumbab, MDPeoria, IL 616021841495785
  18. Alexandra DumitrescuChicago, IL 606371003078049
  19. Eric Duncan, MDBloomington, IL 617041841219763
  20. David Dungan, MDLombard, IL 601481558336057
  21. Daniel Dunham, MDChicago, IL 606111881624294
  22. Ann Dunlap, MDChicago, IL 606121245352202
  23. Alexis Dunne, MDOswego, IL 605431336324367
  24. James Dunne, MDOrland Park, IL 604621417944281
  25. James Dunneback, M.D.Peoria, IL 616371821473547
  26. Lisa Dunning, M.D.Oak Lawn, IL 604531225269053
  27. Susan DunningChicago, IL 606111871910430
  28. James Dunphy, M.D.Chicago, IL 606571801826854
  29. Tan Duong, MDChicago, IL 606401528091642
  30. Navos Pon Golda Durai, MDRiverside, IL 605461629995485
  31. Milan Durco, MDMoline, IL 612651811976137
  32. Leah Durst, M.D.Skokie, IL 600771356355465
  33. Nilufar Duschanova, MDChicago, IL 606081659297471
  34. Gabriella Dutson, DOChicago, IL 606121821922170
  35. Gini Dutt, M.D.Round Lake, IL 600731316137656
  36. Jonathan Dutt, MDDecatur, IL 625261497277263
  37. Sharon Duval, M.D.Chicago, IL 606171366634487
  38. Adelbert Duvel, MDGlen Ellyn, IL 601371275508772
  39. Douglas Duvel, M.D.Chicago, IL 606111275699811
  40. Suresh Duvvada, MDKankakee, IL 609011427623503
  41. Jason Dy, MDNaperville, IL 605401396710265
  42. Marc Wrich DyChicago, IL 606161811417892
  43. Robin Dyer, M.D.Des Plaines, IL 600161528056918
  44. Patricia Dykas, DOChicago, IL 606251275159907
  45. Brian Dyson, DOOlympia Fields, IL 604611346626041
  46. Ema Dzaka-Dizdarevic, M.D.Chicago, IL 606571699020800
  47. Matthew Eakins, M.D.Maywood, IL 601531043447782
  48. Jennifer Earvolino, M.D.Chicago, IL 606121619079688
  49. Colin Eash, DOOak Lawn, IL 604531811524390
  50. Cordus Easington, M.D.Park Ridge, IL 600681912169822

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.