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 21 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. Christian Carrier, MDChicago, IL 606371235933037
  2. Ismael Carrillo Martin, MDChicago, IL 606081952104135
  3. Timothy Carroll, MDSpringfield, IL 627021235751231
  4. Adrianna Carter, MD, MSChicago, IL 606371124709506
  5. Drake Carter, MDOak Lawn, IL 604531558160994
  6. Maria Laura Casalegno, MDChicago, IL 606081578067815
  7. Emily Casaletto, MDChicago, IL 606111326741422
  8. Lauren CasbonOak Lawn, IL 604531881535318
  9. Jordan Cascante, DOPeoria, IL 616371518522705
  10. Karen Casciaro, MDSouth Elgin, IL 601771811900830
  11. Gabriella Cascio, MDChicago, IL 606121235938788
  12. Rachel Caskey, MD, MAPPChicago, IL 606121558306787
  13. Jennifer Casparino, MD, MPHChicago, IL 606371982490009
  14. Jason Castator, M.D.Bensenville, IL 601061972693059
  15. Jorge Castelar ArtigaBerwyn, IL 604021538787460
  16. Jose Castellanos, MDChicago, IL 606111245790377
  17. Coralia Castillo, MDBerwyn, IL 604021851970628
  18. Eileen Castro, MDMoline, IL 612651104892215
  19. Ramon Castro, MDChicago, IL 606411710916663
  20. Reynaldo Castro, MDMoline, IL 612651477539799
  21. Jenecsis Castro-SkoglundPeoria, IL 616141336251958
  22. Kisti Catalano, M.D.La Grange, IL 605251710015664
  23. Steven Cataldo, M.D.Joliet, IL 604351366488835
  24. Karen Catching, M.D.Elgin, IL 601231336219682
  25. Constance Catellani, M.D.Skokie, IL 600761043351745
  26. Daniel CatenacciChicago, IL 606371467609537
  27. Anne Cath, MDBelleville, IL 622261417937574
  28. Michael Caughron, M.D.Glenview, IL 600261164534137
  29. Franklin CavenderMaywood, IL 601531043770126
  30. Jorge Cavero, M.D.Chicago, IL 606291093703209
  31. Niluardo Cay, M.D.Chicago, IL 606221588766646
  32. Iniko CeaserChicago, IL 606121699492447
  33. Sheldon Ceaser, M.D.Chicago, IL 606191215098702
  34. Frida Cervantes Diaz, MDChicago, IL 606121538904883
  35. Daniel Cesario, MDChicago, IL 606121194567073
  36. Andrea Cespedes Zablah, MDChicago, IL 606571083410195
  37. Emily Chacko, M.D.Chicago, IL 606471649205063
  38. Maggie Chacko, MDElmhurst, IL 601261417993734
  39. Melissa Chacko, M.D.Chicago, IL 606571275794182
  40. Shinymol Chacko, MDPeoria, IL 616151487853156
  41. Daisy Chacko Thomas, MDBelvidere, IL 610081407854169
  42. Amar Chadaga, M.D.Oak Lawn, IL 604531164605119
  43. Gurbachan Chadha, MDChicago, IL 606511841204245
  44. Nikhil Chadha, M.DChicago, IL 606121922362029
  45. Daniel Chae, M.D.Maywood, IL 601531619770302
  46. Aenasha Milan ChagChicago, IL 606121255262952
  47. Rachandeep ChahalChicago, IL 606151760945356
  48. Sehaj ChahalUrbana, IL 618011336970144
  49. Rachael Chait, MD, MPHChicago, IL 606121396534921
  50. Keerthana ChakkaChicago, IL 606111558986737

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.