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 93 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. John Olivieri, MDOrland Park, IL 604671578510525
  2. Denise Olivieri-Sulo, MDMaywood, IL 601531649244765
  3. Sharon Ollee, MDAurora, IL 605041013076504
  4. David Olmstead, M.D.Orland Park, IL 604621982610861
  5. Carol Olmstead Miecznikowski, MDGlen Ellyn, IL 601371467429456
  6. Olukayode Olowe, MD PHDChicago, IL 606281699941435
  7. Abisola Olowofeso, MDSpringfield, IL 627021912839556
  8. Guy Olson, MDChicago, IL 606121508614991
  9. Jeffrey Olson, M.D,Chicago, IL 606251952374795
  10. Tolulope Olu-Lawal, MDChicago, IL 606261780207340
  11. Toluwanimi Oludiran-Ayoade, MDOak Lawn, IL 604531942989116
  12. Emmanuel Olumuyide, MDChicago, IL 606571215787262
  13. Toyosi Olutade, MDMoline, IL 612651417111311
  14. Azra Omerovic, M.D.Chicago, IL 606431083629851
  15. Janet Omole, MDOak Lawn, IL 604531538801857
  16. Olasubomi Omoleye, MDChicago, IL 606371154170306
  17. Wuraola Omotosho, MDClifton, IL 609271427222884
  18. Alejandro Ong, M.D.Elgin, IL 601231326174863
  19. Anita Ong, M.D.Oak Park, IL 603041699828715
  20. Matthew OngDanville, IL 618321164927547
  21. Cindy Onumajuru, MDUrbana, IL 618011922843655
  22. Chinyere OnyeukwuChicago, IL 606121740926401
  23. Otuonye Onyewuchi, MD, MPHChicago, IL 606171538354295
  24. Bino Oommen, M.D.Des Plaines, IL 600161235315995
  25. Saji Oommen, M.D.,North Chicago, IL 600641497856330
  26. Oluremi Oparah, M.D.Quincy, IL 623011306152525
  27. Christine Orders, M.D.Chicago, IL 606111194751461
  28. Jeff Ording, M.D.Chicago, IL 606571144751967
  29. Omotola Oredipe, MDChicago, IL 606121790466175
  30. Erik Orelind, M.D.Chicago, IL 606111538193040
  31. Gali Oren-Amit, M.D.Highland Park, IL 600351265606040
  32. Katherine Orengo Gomez, MDChicago, IL 606171174083240
  33. Sabrina Orenstein, MDDes Plaines, IL 600161679684229
  34. Cesar Jose Oropeza Mota, MDChicago, IL 606081710564323
  35. Anand Oroskar, M.D.Normal, IL 617611538587340
  36. Claudia Orozco Vega, MDChicago, IL 606121306731534
  37. Luisa Orrico, M.D.Long Grove, IL 600471649490657
  38. Helenaida Ortega, MDChicago, IL 606131649324898
  39. Gabriel Ortiz CeleminChicago, IL 606111447920392
  40. Juan Ortiz Mairena, M.D.Chicago, IL 606571992694384
  41. Juan Ortiz Rodriguez, MDChicago, IL 606121437743648
  42. Rebeca Ortiz Worthington, MDChicago, IL 606371164952107
  43. Renata Osadnik, M.D.Huntley, IL 601421902819717
  44. Akosua OsafoChicago, IL 606121750210845
  45. Seth Osafo, M.D.Bolingbrook, IL 604401841330537
  46. Ifelunwa Osanakpo, MDUrbana, IL 618011871475608
  47. Stuart Oserman, M.D.Park Ridge, IL 600681750326450
  48. Gerald Osher, M.D.Bannockburn, IL 600151326056136
  49. Kamari Ositelu, MDChicago, IL 606111033613351
  50. Fawsia Osman, MDChicago, IL 606371346862182

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.