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 110 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. Kaylee RosenbaumPeoria, IL 616371417210519
  2. Robert Rosenbaum, M.D.Chicago, IL 606111801900949
  3. Alan Rosenberg, M.D.Oak Park, IL 603021932310752
  4. Carol Rosenberg, MDHighland Park, IL 600351790842904
  5. James Rosenberg, MDKenilworth, IL 600431003818469
  6. Sharon Rosenberg, MDLincolnwood, IL 607121205876893
  7. Daniel RosenblatChampaign, IL 618221063866986
  8. Holly Rosencranz, MDUrbana, IL 618011366555740
  9. Richard Rosenfeld, MDLibertyville, IL 600481649214503
  10. Gregorio Rosenstein, MDChicago, IL 606291619936093
  11. Daniel Rosenthal, MDSkokie, IL 600761023120599
  12. Kimberly Rosenthal, D.O..Long Grove, IL 600471366502643
  13. Bella Rosenzweig, MDChicago, IL 606601710903331
  14. Richard Rosher, M.D.Springfield, IL 627021821073784
  15. Robert RosmanChicago, IL 606121518062538
  16. Ellen Ross, M.D.Chicago, IL 606111275572422
  17. Sydney Ross-Davis, M.D.Chicago, IL 606011801072558
  18. Cortney Rosser, M.D., M.S.Danville, IL 618321205009693
  19. Ashley Rossi, M.D.Springfield, IL 627111659729002
  20. Walter Rossi, MDChicago, IL 606111225731433
  21. Trevor Roston, MDElgin, IL 601231083173223
  22. Paula RoteChicago, IL 606151891359691
  23. Morry Rotenberg, MDArlington Heights, IL 600041801821236
  24. Hannah Roth, MDChicago, IL 606371700315769
  25. Julianna Roth, MDChicago, IL 606111003831744
  26. Kelly Roth, MDUrbana, IL 618011346892270
  27. Robin Rothbard, M.D.Oak Brook, IL 605231801854856
  28. Peter Roumeliotis, MDMorris, IL 604501942280326
  29. Kelly Rourke, M.D.Edwardsville, IL 620251033185285
  30. Guy Rowley, M.D.Chicago, IL 606301972617074
  31. Ashish RoyPeoria, IL 616371194133850
  32. Debjani Roy, M.D.Glenview, IL 600261760404198
  33. Estefan Roy, MDChicago, IL 606341457430852
  34. Moni Roy, M.D.Peoria, IL 616371255773198
  35. Shalini RoyChicago, IL 606371851191555
  36. Shirley Roy, MDChicago, IL 606401588683460
  37. Beth Royston, M.D.Chicago, IL 606111255370490
  38. Shaina Rozell, MDChicago Ridge, IL 604151508187253
  39. Cynthia Rozier, M.D.Chicago, IL 606401902191232
  40. Jonah Rubin, M.D.Maywood, IL 601531295025245
  41. Rachel Rubin, MDChicago, IL 606121699790279
  42. Adam Rubinstein, MDLibertyville, IL 600481871541839
  43. Wendy Rubinstein, MD, PHDEvanston, IL 602011477592111
  44. Elenita Rubio, M.D.Chicago, IL 606391962514984
  45. Noel Rubio, M.D.Chicago, IL 606391922036797
  46. Mark Rudberg, MD MPHLake Forest, IL 600451295838647
  47. Walter Rudek, M.D.Chicago, IL 606381932277324
  48. Eileen Ruder, M.D.River Forest, IL 603051497186407
  49. Henry Ruder, M.D.River Forest, IL 603051013286491
  50. Ann Rudinger, MDMaywood, IL 601531982670477

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.