NPPES file of Aug 9, 2026

Gastroenterology Physician in Oregon

281 NPPES records list gastroenterology physician with a practice address in Oregon, 6.6 per 100,000 residents, the 15th highest rate of 51. Portland and Springfield have the most; each record links to the provider's NPI and the Oregon license search. Page 5 of 6.

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).

Portland has the most, 135

  1. Portland135
  2. Springfield21
  3. Salem19
  4. Tualatin18
  5. Bend14

Gastroenterology Physician records in Oregon

  1. Swapna Reddy, M.D.Tualatin, OR 970621114106507
  2. James Regan, MDPortland, OR 972201831182179
  3. Evan ReinhartHillsboro, OR 971231578068284
  4. Jennifer Rodriguez, M.D.Gresham, OR 970301104318419
  5. Sarah Rodriguez, MDPortland, OR 972251386665214
  6. Charles Rosenblatt, MDHillsboro, OR 971231518968189
  7. Albert Ryckman, MDAlbany, OR 973211750341905
  8. Amit Sadana, MDClackamas, OR 970151043285711
  9. Karen Saks, MDPortland, OR 972251306136502
  10. Herbert Salomon, M.D.Portland, OR 972271275640401
  11. Anna Sasaki, MD, PHDPortland, OR 972391487660965
  12. Alan Savoy, MDPortland, OR 972201306839543
  13. John Schaer, MDHillsboro, OR 971231780685206
  14. Mark Schiele, MDTualatin, OR 970621356337943
  15. Barry Schlansky, M.D.Portland, OR 972271770692428
  16. Paul Schleinitz, MDMedford, OR 975041437129087
  17. Edward Schultheiss, MDSalem, OR 973061730167586
  18. Jonathan Schwartz, MDPortland, OR 972391215945738
  19. Jaime Scott, MDOregon City, OR 970451841829314
  20. Nizar Senussi, MDSalem, OR 973011174964878
  21. Anil Sharma, M.D.Portland, OR 972251497172530
  22. Kaveh Sharzehi, MDPortland, OR 972391770786378
  23. Michael Sheffield, MDOregon City, OR 970451083600431
  24. Hong Shen, M.D.Portland, OR 972201366406332
  25. Robert Shneidman, M.D.Portland, OR 972271447363148
  26. Douglas Shumaker, MDPortland, OR 972251225034937
  27. Adam Silverblatt, M.D.Portland, OR 972251811070741
  28. Davis Sim, MD PHDSpringfield, OR 974771265668263
  29. Ajay Singhvi, M.D.Portland, OR 972201740623131
  30. Rodger Sleven, MDPortland, OR 972251720084361
  31. Matthew Smith, MDPortland, OR 972101962590570
  32. Mark Sofia, M.D.Portland, OR 972391912261496
  33. Lehel Somogyi, MD, PHDPortland, OR 972201700879863
  34. Amnon Sonnenberg, MDPortland, OR 972391124033626
  35. Christian Speer, M.D.Salem, OR 973061407826563
  36. Patrick Stauffer, MDPortland, OR 972201639706260
  37. James Stragand, M.D.Bend, OR 977011194700294
  38. Srinivasan Subramanian, M.D.Salem, OR 973061710180724
  39. Dennis Sweeney, MDPortland, OR 972201760475826
  40. Caroline Tadros, M.D.Clackamas, OR 970151427107770
  41. Vicki Tang, MDPortland, OR 972391316697501
  42. Branden Tarlow, MDPortland, OR 972201063845998
  43. Eric Tatro, MDSalem, OR 973011558821827
  44. Molly Thomas, MD, PHDPortland, OR 972391831502004
  45. Amelie Tiritilli, MDTualatin, OR 970621962908061
  46. Abhinav Tiwari, MDSpringfield, OR 974771225411598
  47. Theodore Tollivoro, M.D.Clackamas, OR 970151811230147
  48. Cristian Vallejos, M.D.Portland, OR 972251033206594
  49. Dirk Van Leeuwen, M.D., PH.D., FAASLDPortland, OR 972161205941309
  50. Erik Vankleek, MDTualatin, OR 970621811192370

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

Oregon ranks 15 of 51 per resident

  1. Washington6.8
  2. Florida6.7
  3. Missouri6.7
  4. Oregon6.6
  5. Ohio6.3
  6. North Carolina6.3
  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.

78.6% 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. Oregon78.6%
  2. United States84.4%

Gastroenterology Physician records in Oregon, measured

  • In a Medicare file221 of 281 · 78.6% here, 84.4% nationally
  • In the CMS Doctors and Clinicians file201 · 71.5% here, 73.7% nationally
  • Not updated in five years or more127 · 45.2% here, 55.6% nationally
  • Median graduation year2003 · the 201 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

281 NPPES records list gastroenterology physician (207RG0100X) as their primary taxonomy with a practice address in Oregon: 6.6 per 100,000 residents against 6.2 nationally (50 states and D.C.). Portland has 135 of them (48%).

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. Louisiana263
  2. South Carolina303
  3. Alabama232
  4. Colorado334

States with a similar rate per 100,000

  1. Missouri6.7
  2. Florida6.7
  3. Washington6.8
  4. Puerto Rico6.3

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.