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 70 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. Mohsina Laliwala, MDNorthbrook, IL 600621386953602
  2. Jeremy Lalla, MDPark Ridge, IL 600681699616177
  3. Audrey Lam, MDUrbana, IL 618011477171536
  4. Brianna Lambert, MDChicago, IL 606371083359269
  5. Daniel Landek, MDEvanston, IL 602011306692363
  6. Catherine Landers, M.D.Skokie, IL 600761235184003
  7. Emily LandonChicago, IL 606371942378138
  8. Johan Lane, MDGlenview, IL 600251881740561
  9. Carl Lang, M.D.Buffalo Grove, IL 600891730167339
  10. Daniel LangChicago, IL 606121871692707
  11. Herbert Lang, MDSkokie, IL 600771811056682
  12. Kayla Lang, DOChicago, IL 606121144070392
  13. Frances Langdon, MDChicago, IL 606111063405546
  14. Patricia Langehennig, MD, MPHJoliet, IL 604321841382371
  15. Gordon Langejans, MDRockford, IL 611031164567509
  16. Robert Langman, D.O.South Elgin, IL 601771164592432
  17. Ana LanierChicago, IL 606371760170302
  18. Lavanya Lanka, MBBSChicago, IL 606121932620820
  19. Anat Lansky, MDWilmette, IL 600911912040429
  20. Olga Lansky, M.D.Chicago, IL 606451326019407
  21. Dennis Larson, M.D.Belleville, IL 622211003096140
  22. Hanna Larson, DO, MSMaywood, IL 601531952051989
  23. Jared Larson, MDChicago, IL 606111871243519
  24. Robert Larson, DORockford, IL 611081902546963
  25. Ryan LashgariChicago, IL 606111205774239
  26. Shehla Lasi-Siddiqi, M.D.Chicago, IL 606161083637433
  27. Steven Lasin, MDLake Forest, IL 600451477574945
  28. Monika Lastowiecka, M.D.Hoffman Estates, IL 601691750363222
  29. Yama Latif, MDChicago, IL 606121518589423
  30. Vance Lauderdale, M.D.Chicago, IL 606121942312558
  31. Ashley Laurisch, DOOrland Park, IL 604671326626391
  32. Brian Lavery, MDChicago, IL 606021578592069
  33. Mark Lavizzo, MDUrbana, IL 618011326198508
  34. Judy Law, M.D.Chicago, IL 607071225042229
  35. Charles Lawler, M.D.Chicago, IL 606091356324867
  36. James Lawler, M.D.Marion, IL 629591821353913
  37. Michael Lawler, MDMarion, IL 629591629203708
  38. Colleen Lawler-Bjornberg, MDMarion, IL 629591750370243
  39. Gregg Laws, MDCarlinville, IL 626261861598534
  40. Ebony Lawson, M.D.Chicago, IL 606111932463056
  41. Patrick Lay, MDSkokie, IL 600771639238405
  42. Jennifer Layden, MD, PHDChicago, IL 606121902094360
  43. Daniel Lazar, M.D.Morton Grove, IL 600531841298395
  44. Artemii Lazarev, MDChicago, IL 606081992478168
  45. Vojislav Lazarevic, MDChicago, IL 606571245317940
  46. Ludmil Lazarov, MDChicago, IL 606121285826404
  47. Cathy Lazarus, MDHighland Park, IL 600351346430998
  48. Anh Si Le, DOElgin, IL 601201295361152
  49. Phi-Nga Le, MDAurora, IL 605051316992936
  50. Sean Le, M.D.Chicago, IL 606401578552915

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.