NPPES file of Aug 9, 2026

Gastroenterology Physician in Iowa

122 NPPES records list gastroenterology physician with a practice address in Iowa, 3.8 per 100,000 residents, the 47th highest rate of 51. Iowa City and Clive have the most; each record links to the provider's NPI and the Iowa license search. Page 2 of 3.

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).

Iowa City has the most, 44

  1. Iowa City44
  2. Clive20
  3. West Des Moines15
  4. Cedar Rapids9
  5. Waterloo8

Gastroenterology Physician records in Iowa

  1. John Herlihy, M.D.Cedar Rapids, IA 524031245625151
  2. Gilles Hoilat, MBBSCedar Rapids, IA 524031871153247
  3. Adrian Holm, D.O.Iowa City, IA 522421093794844
  4. Young Huh, MDBettendorf, IA 527221407830912
  5. Mirac Ince, M.D.Iowa City, IA 522421285844217
  6. Mohammed Irshad, M.D.Clinton, IA 527321508854589
  7. Ganesh Iyer, MDDes Moines, IA 503101255493029
  8. Rajalakshmi Iyer, MDClive, IA 503251699745760
  9. Frederick Johlin, MDIowa City, IA 522421821085960
  10. Thomas Johnson, M.D.Nevada, IA 502011639168685
  11. Larry Johnston, D.O.Ames, IA 500101386036333
  12. Clayton Jordan, D.O.West Des Moines, IA 502661518306323
  13. Srinivas Kalala, M.D.Waterloo, IA 507011619140910
  14. Serhan Karvar, MDIowa City, IA 522421992209167
  15. Allen Kaufman, M.D.Clive, IA 503251497757009
  16. Gopala Koneru, M.D.Iowa City, IA 522421881041754
  17. Ujjwal Kumar, M.D.Cedar Rapids, IA 524011235570805
  18. Masaaki Kurahashi, MDIowa City, IA 522421568058329
  19. Charles Larson, M.D.West Des Moines, IA 502661518952209
  20. Erling Larson, MDBettendorf, IA 527221972585149
  21. Ye-Jin Lee, MDIowa City, IA 522421457672438
  22. Bernard Leman, MDClive, IA 503251972560597
  23. Randall Lengeling, M.D.Dubuque, IA 520011912976861
  24. Avraham Levin, M.D.Iowa City, IA 522421982096632
  25. Tercio Lopes, MDClive, IA 503251336352772
  26. Ravindra Mallavarapu, MDWaterloo, IA 507011982657961
  27. Richard Manfready, M.D.Waterloo, IA 507011710419122
  28. Thomas Martin, DOClive, IA 503251417908922
  29. Maen Masadeh, MBBSIowa City, IA 522421497014260
  30. Frances Meyer, MDIowa City, IA 522421548212343
  31. Mohamad Mokadem, M.D.Iowa City, IA 522421386803187
  32. Victor Mujica, MDCedar Falls, IA 506131003859877
  33. Christopher Mulder, DOClive, IA 503251356577951
  34. Taimur Muzammil, MDIowa City, IA 522421932781697
  35. Nagendra Myneni, MDClive, IA 503251649238643
  36. Sara Naimimohasses, MB BCHIowa City, IA 522421932915329
  37. Rohit Nathani, MBBSIowa City, IA 522421356957245
  38. Ngozi Nwude, MBBSIowa City, IA 522421023806924
  39. Steve Obanor, M.B.B.S.Waterloo, IA 507021457872327
  40. Michael Obrien, MDClive, IA 503251295793420
  41. Daniel Peasley, D.O.West Burlington, IA 526551821095027
  42. Nathalie Pena Polanco, M.D.Cedar Rapids, IA 524011063828523
  43. Ryan Perumpail, M.D.Bettendorf, IA 527221649546623
  44. James Piros, M.D.West Des Moines, IA 502661700872801
  45. Steven Polyak, MDIowa City, IA 522421932141660
  46. Benjamin Pottebaum, D.O.Clive, IA 503251528419066
  47. David Pratt, MDBettendorf, IA 527221073597597
  48. Douglas Purdy, MDCedar Rapids, IA 524011376528562
  49. Leon Qiao, M.D.Cedar Rapids, IA 524011013992205
  50. Swathi Rajagopal, M.B.B.S.Iowa City, IA 522421770156218

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

Iowa ranks 47 of 51 per resident

  1. Oklahoma3.9
  2. Montana3.9
  3. Arkansas3.9
  4. Iowa3.8
  5. Kansas3.8
  6. Nevada3.7
  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.

79.5% 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. Iowa79.5%
  2. United States84.4%

Gastroenterology Physician records in Iowa, measured

  • In a Medicare file97 of 122 · 79.5% here, 84.4% nationally
  • In the CMS Doctors and Clinicians file84 · 68.9% here, 73.7% nationally
  • Not updated in five years or more66 · 54.1% here, 55.6% nationally
  • Median graduation year2000 · the 84 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

122 NPPES records list gastroenterology physician (207RG0100X) as their primary taxonomy with a practice address in Iowa: 3.8 per 100,000 residents against 6.2 nationally (50 states and D.C.). Iowa City has 44 of them (36%).

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. Arkansas119
  2. Nevada119
  3. Mississippi128
  4. Kansas111

States with a similar rate per 100,000

  1. Montana3.9
  2. Oklahoma3.9
  3. North Dakota4.1
  4. Idaho4.2

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.