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 38 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. Salma Ferouz, MDDes Plaines, IL 600161962962860
  2. Herman Ferrell, M.D.East St Louis, IL 622011437153921
  3. Gabriela Ferrera, M.D.Chicago, IL 606411992002711
  4. Maria FerreraChicago, IL 606371285955476
  5. Ellen Fertelmeister, M.D.Skokie, IL 600761740343193
  6. Thomas Ficho, M.D., PH.D.Glenview, IL 600261336141746
  7. John Fiedler, M.D.Elgin, IL 601231487623716
  8. Robert Figura, D.O.Evanston, IL 602011275973620
  9. Richard Fikes, DOBelleville, IL 622261235176686
  10. Louis Filipiak, MD, MBAChicago, IL 606121780376244
  11. Marek Filipiuk, M.D.Long Grove, IL 600471013981778
  12. Smaranda Fillip, MDChicago, IL 606401235754029
  13. Malcolm Findlater, M.D.Quincy, IL 623011508864018
  14. Richard Finegold, MD.Elmhurst, IL 601261770564122
  15. Patricia Finn, MDChicago, IL 606121568729507
  16. Carlos Fior, M.D.Decatur, IL 625261336237296
  17. Anita Fischer, MDOrland Park, IL 604671700953759
  18. Barry Fischer, M.DNaperville, IL 605631982753653
  19. Jacqueline Fischer, MDPeoria, IL 616371417921024
  20. Matthew Fischer, MDSkokie, IL 600771750345302
  21. Neal Fischer, M.D.Chicago, IL 606611538463294
  22. Tessa Fischer, MDEvanston, IL 602021730247859
  23. Elizabeth Fisher, MDChicago, IL 606121275295883
  24. Kathy Fisher, MDSkokie, IL 600771396703997
  25. Linda Fisher, MDMaywood, IL 601531902873573
  26. Tyler Fitch, M.D.Peoria, IL 616371992068936
  27. Matthew Fitz, MDPalos Heights, IL 604631205800513
  28. Katherine Fitzgerald, M.D.Bloomington, IL 617011306007836
  29. Thomas Flanagan, MDElk Grove Village, IL 600071508841883
  30. Lloyd Flatt, M.D.Marseilles, IL 613411295713766
  31. Glenda Flemister, MDFrankfort, IL 604231700150505
  32. Diane Flershem, M.D.Arlington Heights, IL 600041447205869
  33. Nathan FletcherOak Lawn, IL 604531598517567
  34. Christopher Flinn, M.D.Chicago, IL 606231063668341
  35. Nicole Florence, M.D.Springfield, IL 627021811983851
  36. Erika Flores, M.D.Chicago, IL 606421346421591
  37. Patrick Florido, M.D.Springfield, IL 627811437505765
  38. Dennis Flynn, M.D.Elgin, IL 601231295704435
  39. Lillian Foca Munoz, M.D.Chicago, IL 606081518173152
  40. Luciano Fochesatto Filho, M.D.Crestwood, IL 604181356591549
  41. Joseph Fojtik, MDMcHenry, IL 600501801971171
  42. Deborah Foley, M.D.Arlington Heights, IL 600051750559951
  43. Caspian Folmsbee, M.D.Chicago, IL 606121720306640
  44. Janet Forbes, M.D.Oak Park, IL 603041295838779
  45. Kevin Forde, DOMaywood, IL 601531205639671
  46. Jeffrey Foreman, M.D.Deerfield, IL 600151881663243
  47. Jonathan Forrest, MDMaywood, IL 601531013855097
  48. Olivia Forys, M.D.Des Plaines, IL 600161255539516
  49. Victor Forys, M.D.Chicago, IL 606301669585857
  50. Wendy Foster, MDRiver Forest, IL 603051396703070

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.