NPPES file of Aug 9, 2026

Gastroenterology Physician in Illinois

887 NPPES records list gastroenterology physician with a practice address in Illinois, 7.1 per 100,000 residents, the 11th highest rate of 51. Chicago and Maywood have the most; each record links to the provider's NPI and the Illinois license search. Page 18 of 18.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RG0100X · 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, 278

  1. Chicago278
  2. Maywood41
  3. Rockford25
  4. Springfield25
  5. Aurora23

Gastroenterology Physician records in Illinois

  1. Sandeep Walia, M.D.Belleville, IL 622261467763607
  2. Alan Wang, MDNaperville, IL 605401831376359
  3. Catherine Wang, MDChicago, IL 606251891321741
  4. Edwin Wang, MDChicago, IL 606121578142063
  5. Jennifer Wang, MDChicago, IL 606371962897561
  6. Kaitlin Wanta, D.O.Tinley Park, IL 604871386986537
  7. Irving Waxman, MDBurr Ridge, IL 605271487717906
  8. Mervyn Weis, MDChicago, IL 606401043212954
  9. Matthew Weiss, MDHinsdale, IL 605211275023277
  10. Roni Weisshof, M.D.Chicago, IL 606371801338025
  11. Loren White, M.D.Arlington Heights, IL 600051477543809
  12. Rashad Wilkerson, D.O.Urbana, IL 618021821152067
  13. Jonathan Williams, D.0.Kenilworth, IL 600431013195650
  14. Tj Wilson, MDSpringfield, IL 627021578205431
  15. Herbert Wiser, MDNormal, IL 617611770506651
  16. Lionel Wong, M.D.Dixon, IL 610211619945037
  17. Leslie Yang, M.D.Evanston, IL 602011366619686
  18. Russell Yanofsky, MDCMChicago, IL 606371104663269
  19. Rockford Yapp, M.D., M.P.H.Downers Grove, IL 605151356327910
  20. Alex Yarbrough, D.O.Champaign, IL 618221346253994
  21. Cemal Yazici, MDChicago, IL 606121295039865
  22. Eric Yegelwel, MDArlington Heights, IL 600041093760415
  23. Meredith Yellen, MDChicago, IL 606371255960845
  24. Eugene Yen, MDEvanston, IL 602011508944018
  25. Minting Yu, MDChicago, IL 606121396360665
  26. Laura Yun, M.D.Chicago, IL 606111649373903
  27. George Zahrebelski, M.D.Hoffman Estates, IL 601691013001924
  28. Syed Zaidi, M.D.Aurora, IL 605041689618290
  29. Saeed Zamir, M.D.Du Quoin, IL 628321134113400
  30. Carlos Zamudio, PA-CLake Barrington, IL 600101407781701
  31. Edwin Zarling, MDMaywood, IL 601531912986290
  32. David Zepeda, MDAurora, IL 605061114036365
  33. Hao Zhang, M.D. PHDHuntley, IL 601421346637485
  34. Eric Zhao, MDChicago, IL 606121629605753
  35. Adar Zinger, MDChicago, IL 606371184358889
  36. Sharif Zubair, MDGeneva, IL 601341316988033
  37. Mir Zulqarnain, DOGlenview, IL 600261780145458

Source: CMS NPPES, primary taxonomy 207RG0100X: records by practice city and the list of records, file of Aug 9, 2026.

Illinois ranks 11 of 51 per resident

  1. Minnesota8.0
  2. New Jersey7.9
  3. New Hampshire7.8
  4. Illinois7.1
  5. Washington6.8
  6. Florida6.7
  7. 50 states and D.C.6.2

Source: CMS NPPES, primary taxonomy 207RG0100X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

85.3% of these records appear in a Medicare file, against 84.4% 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. Illinois85.3%
  2. United States84.4%

Gastroenterology Physician records in Illinois, measured

  • In a Medicare file757 of 887 · 85.3% here, 84.4% nationally
  • In the CMS Doctors and Clinicians file643 · 72.5% here, 73.7% nationally
  • Not updated in five years or more436 · 49.2% here, 55.6% nationally
  • Median graduation year2003 · the 643 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RG0100X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

887 NPPES records list gastroenterology physician (207RG0100X) as their primary taxonomy with a practice address in Illinois: 7.1 per 100,000 residents against 6.2 nationally (50 states and D.C.). Chicago has 278 of them (31%).

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. Ohio741
  2. New Jersey735
  3. Pennsylvania1,049
  4. Massachusetts686

States with a similar rate per 100,000

  1. Washington6.8
  2. Florida6.7
  3. Missouri6.7
  4. Oregon6.6

The largest states

  1. California2,140
  2. New York1,797
  3. Florida1,513
  4. Texas1,478
  5. Pennsylvania1,049

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.