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 50 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. Yasir Hasnain, MDSpringfield, IL 627021467386300
  2. Hatem HassaballaChicago, IL 606371699174540
  3. Adil HassanChicago, IL 606121831982602
  4. Farhan Hassan, MDSpringfield, IL 627021922996081
  5. Hatim HassanChicago, IL 606371417970385
  6. Johara Hassan, MDNaperville, IL 605401568417301
  7. Mira HassanOak Lawn, IL 604531942141916
  8. Samreen Hassan, MDOak Lawn, IL 604531962206763
  9. Seerat Hassan, DOKankakee, IL 609011629645478
  10. Waheed Ul Hassan, MDBloomington, IL 617011801467295
  11. Lashaone Hatchett, M.D.North Chicago, IL 600641366645681
  12. Samantha Hathaway, M.D.Palos Heights, IL 604631497018477
  13. Aristidis Hatzidimitriadis, MDNaperville, IL 605641508027855
  14. Haralambos Hatzidimitriadis, MDChicago, IL 606341780766170
  15. Dru Hauter, M.D.Normal, IL 617611255353660
  16. Zlatko Haveric, M.D.Jolie, IL 604351568492726
  17. Robert Havey, MDChicago, IL 606111780677211
  18. Saadiya Abdul Ahad Hawa, MDPark Ridge, IL 600681548947062
  19. Hiroaki Hayashi, M.D.Chicago, IL 606121487090007
  20. Rwan HayekMaywood, IL 601531154261451
  21. Kenneth Hayes, M.D.Chicago, IL 606031700812872
  22. Richard Hayes, M.D.Chicago, IL 606461104924638
  23. Sean Hayes, M.D.Springfield, IL 627811326337692
  24. Kenichi HaynieChicago, IL 606371871480574
  25. James Hays, MDChicago, IL 606371053840199
  26. Trent Haywood, MD, JDChicago, IL 606151962583005
  27. Robert Healy, MDChampaign, IL 618221619984291
  28. Daniel HechtMaywood, IL 601531538928775
  29. Roger Hecker, MDGlenview, IL 600261083630925
  30. Paul HeckerlingChicago, IL 606121023114501
  31. Michael HeffernanChicago, IL 606121891374906
  32. Thomas Heggen, MDBuffalo Grove, IL 600891710974860
  33. Diane Heidmann, MDChicago, IL 606111003100629
  34. Heather Heiman, MDChicago, IL 606121538198049
  35. Tracey HeimbergerNorth Chicago, IL 600641417291097
  36. Marie Heimerdinger, M.D.Freeport, IL 610321952400442
  37. Doris Hein, M.D.Orland Park, IL 604621265453997
  38. Kurt Heinking, D.O.Chicago, IL 606731558462531
  39. Thomas Heischmidt, M.D.Effingham, IL 624011396720983
  40. Seth Heithaus, MDNorth Chicago, IL 600641376165977
  41. Brunhilde Helias, MDUrbana, IL 618011164127247
  42. Sabrina Heline, DOChicago, IL 606121457247892
  43. Ilah Heller-Bair, MDLemont, IL 604391336206150
  44. Paul Helman, MDSkokie, IL 600771104985977
  45. Maureen Hendron, M.D.Elk Grove Village, IL 600071487836078
  46. Anne Henkel, MDChicago, IL 606111164627675
  47. Joseph Hennessy, M.D.Chicago, IL 606071265407209
  48. Amy Henning, MDChicago, IL 606111174780035
  49. Hans Henriquez, M.D.Addison, IL 601011053725994
  50. Rolando Henriquez, M.D.Addison, IL 601011144370990

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.