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 71 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. Lexis Leach, APRNMoline, IL 612651659165975
  2. Daniel Leary, MD, MAChicago, IL 606111811633407
  3. Jacqueline Leavitt, M.D.Chicago, IL 606121144332768
  4. Molly Leavitt, MDBerwyn, IL 604021497375349
  5. Vanessa Leblanc, M.D.Chicago, IL 606121750523320
  6. Elaine Leboff-Ries, M.D.Chicago, IL 606041013965771
  7. Alicia Lee, MDNaperville, IL 605631871684415
  8. Cathryn Lee, MDChicago, IL 606371518305390
  9. Choongkoon Lee, MDMorris, IL 604501497761811
  10. David LeeMaywood, IL 601531417533043
  11. David Lee, MD, PHDChicago, IL 606111982306916
  12. David Lee, M.D.Danville, IL 618321023491412
  13. Eric Lee, MDAlton, IL 620021306221346
  14. Grace Lee, MDChicago, IL 606121417103623
  15. Hyo Lee, DOEvanston, IL 602021588981138
  16. Jane Lee, MDEvanston, IL 602011396812350
  17. Jean Lee, MDChicago, IL 606161558348375
  18. Jenny Lee, M.D.Chicago, IL 606571093759490
  19. John Lee, M.D.Naperville, IL 605401265449722
  20. John Lee, M.D.Springfield, IL 627021336374297
  21. Jonathan Lee, MDChicago, IL 606121407556863
  22. Juwon Lee, DOBuffalo Grove, IL 600891447991930
  23. Karen Lee, M.D.Aurora, IL 605041417022351
  24. Kristen Lee, MDChicago, IL 606111134584568
  25. Kristin Lee, MDChicago, IL 606121962442160
  26. Michael Lee, MDChicago, IL 606111942293451
  27. Michelle Lee, MDMaywood, IL 601531861001034
  28. Nam Kyung Lee, MDPark Ridge, IL 600681134860448
  29. Norman Lee, M.D.Great Lakes, IL 600881053394189
  30. Olivia LeeChicago, IL 606121720926769
  31. Shaotseng LeePeoria, IL 616031225108855
  32. Sue Lee, M.D.Chicago, IL 606411508870270
  33. Sung Ah Lee, D.O.Hinsdale, IL 605211497773717
  34. Uh Jin LeeChicago, IL 606081720976897
  35. Wei Wei Lee, MDChicago, IL 606371972761872
  36. William Lee, M.D.Dekalb, IL 601151356350581
  37. Woo Lee, M.D.Peoria, IL 616151790796076
  38. Young Lee, MDChicago, IL 606121487346078
  39. Katherine Lee Chuy, M.D.Chicago, IL 606121750780391
  40. Kathryn Lee Noll, D.O.Chicago, IL 606121982991774
  41. Deepak Leekha, MDCicero, IL 608041770540163
  42. Milton Legrand, MDHinsdale, IL 605211568437655
  43. Joel Leifheit, MDPeru, IL 613541871696229
  44. Kurt Leimbach, M.D.Quincy, IL 623011982677373
  45. John Leiner, M.D.Quincy, IL 623011962571596
  46. Julie Leischner, MDWheaton, IL 601871336222488
  47. Megan LeitnerOak Lawn, IL 604531114712304
  48. Adonias Lemma, MDChicago, IL 606111891457222
  49. Maurice Lemon, M.D.Chicago, IL 606121376570721
  50. Robert Lenet, M.DChicago, IL 606111205978186

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.