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 91 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. Gary Novak, M.D.Wilmette, IL 600911194876029
  2. Robert Noven, MDChicago, IL 606011326066929
  3. Nancy Novotny, M.D.Glenview, IL 600251811005630
  4. Lynne Nowak, MDBelleville, IL 622201174520746
  5. Bonnie Nowakowski, D.O.Oak Park, IL 603041932403656
  6. Ana Nowell, MDBurbank, IL 604591023034188
  7. Eno Nsima-Obot, MDMaywood, IL 601531033180245
  8. Andrew Ntabi, MDChicago, IL 606571578119137
  9. Adrian NublaChicago, IL 606121275395238
  10. Hannah Nuckols, D.O.Park Ridge, IL 600681093075434
  11. Olivia Nuelle, MDMaywood, IL 601531649910381
  12. Miriam Nuer, M.D.Lincolnwood, IL 607121851683353
  13. Colleen Nugent, MDGlenview, IL 600261083773535
  14. Shohala Numaira, M.D.Long Grove, IL 600471588930911
  15. Ausencio Nunez, M.DAddison, IL 601011407996564
  16. Erin Nusbaum, MDChicago, IL 606121336844281
  17. Osama Nusrat, M.D.Quincy, IL 623011720433220
  18. Doris Nussenbaum, M.D.Park Ridge, IL 600681548286180
  19. Cherechi Nwabueze, MD, MPHChicago, IL 606121518702521
  20. Michelle NwachukwuChicago, IL 606121407596141
  21. Izuchukwu Nwafo, M.DOak Park, IL 603041952577819
  22. Chineze Nwankwo, MDChicago, IL 606401497493746
  23. Daniel Nwankwo, M.D.Normal, IL 617611639526007
  24. Ngozi Nwaoha, M.D.Chicago, IL 606121376390708
  25. Emmanuel Nwaokocha, MDChicago, IL 606081003999376
  26. Chukwuemeka Nzewi, M.DRock Island, IL 612011215303847
  27. Linda O'Bannon, MDChicago, IL 606011932501533
  28. Daniel O'Brien, M.D.Metamora, IL 615481275741829
  29. John O'Brien, MDChicago, IL 606121376572891
  30. Michael O'Brien, DOPark Ridge, IL 600681245081454
  31. Brian O'ByrneElgin, IL 601231760923056
  32. Patricia O'Connor, M.D.Homer Glen, IL 604911780676403
  33. Briana O'DonnellMaywood, IL 601531649807793
  34. Hannah O'Hagan, MDChicago, IL 606371942056643
  35. Meghan O'Halloran, M.D.Maywood, IL 601531790006138
  36. Meaghan O'HaraChicago, IL 606371659906352
  37. Brian O'Leary, MDNaperville, IL 605641295702439
  38. Kevin O'Leary, MDChicago, IL 606111902837537
  39. Rachel O'Mara, MDChicago, IL 606111891701702
  40. Patrick O'Meara, M.D.Elmhurst, IL 601261437127891
  41. Susan O'Neal, D.O.Springfield, IL 627121003916784
  42. Ann O'Neill, RD, MDMaywood, IL 601531659796381
  43. William O'Rourke, MDLombard, IL 601481013013119
  44. Branka O'Sullivan, MDSkokie, IL 600761497709968
  45. Sujata Oak, MDDekalb, IL 601151275503849
  46. Iulia Oana, MDHinsdale, IL 605211306010756
  47. Graylynn Oatess, MDChicago, IL 606121922843457
  48. Dipika Oberoi, MDEvanston, IL 602011023240652
  49. Alexa Oberster, DOChicago, IL 606251992630412
  50. Felix ObregonNaperville, IL 605631831271709

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.