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 4 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. Justin Lewis, M.D.Portland, OR 972161831621929
  2. Shannon Lewis, MDPortland, OR 972251780888446
  3. Myron Lezak, MDPortland, OR 972191487654992
  4. Dekey Lhewa, MDPortland, OR 972391518166438
  5. David Lieberman, M.D.Portland, OR 972391790713063
  6. Emery Lin, M.D.Portland, OR 972391871869362
  7. Weitian Liu, MD, PHDHillsboro, OR 971241225254436
  8. John Lobitz, MDPortland, OR 972251851397558
  9. Rodolfo Lorenzo, M.D.Roseburg, OR 974701619986981
  10. Donald Lum, MDPortland, OR 972201376535724
  11. Nathan Markowitz, M.D.Eugene, OR 974011831141910
  12. Ranjan Mascarenhas, MDPortland, OR 972391013959535
  13. Steven Mason, MDOregon City, OR 970451174519524
  14. Rebecca Matro, M.D.Portland, OR 972391043484405
  15. Patrick Maveety, M.D.Newberg, OR 971321265535181
  16. Clifford Melnyk, MDPortland, OR 972391811902331
  17. Shane Mills, MDSpringfield, OR 974771699747055
  18. M. Mirhej, M.D.Springfield, OR 974771548237910
  19. Arnab Mitra, M.D.Portland, OR 972391003175464
  20. Jubeen Moaven, MDSpringfield, OR 974771346401445
  21. Nir Modiano, MD, PHDPortland, OR 972391073790788
  22. Dempsie Morrison, D.O.Roseburg, OR 974711992031793
  23. Chad Morse, M.D.Corvallis, OR 973301588794135
  24. Nima Motamedi, M.D.Tualatin, OR 970621639440381
  25. Adam Mougey, M.D.Medford, OR 975041255482360
  26. Rajasekhara Mummadi, MBBSHillsboro, OR 971241134323710
  27. Willscott Naugler, M.D.Portland, OR 972391689698342
  28. Myles NelliganPortland, OR 972201285563205
  29. Meghan Nesmith, M.D.Portland, OR 972391356640544
  30. Kimya-Anhcina Nguyen, DOMcMinnville, OR 971281073596243
  31. Jeffrey Olson, M.D.Clackamas, OR 970151730380791
  32. Mohamed Osman, MDPortland, OR 972391750766655
  33. Fouad Otaki, M.D.Portland, OR 972391013229996
  34. Ashley OttSalem, OR 973011013543073
  35. Michael Owens, MDPortland, OR 972161154327716
  36. Chakri Panjala, M.D.Eugene, OR 974081790774677
  37. Joseph Parent, M.D.Portland, OR 972011942489554
  38. Harry Park, MDSpringfield, OR 974771467430959
  39. Monina Pascua, MDOregon City, OR 970451144382425
  40. Laura Pestana, DOPortland, OR 972161588002521
  41. Sorin Petre, M.D.Roseburg, OR 974711629037486
  42. Daniel Phillips, MDSpringfield, OR 974771407875255
  43. Michael Phillips, MDPortland, OR 972201366434656
  44. Robert Ponec, MDSalem, OR 973011356329049
  45. Alan Posner, MDMedford, OR 975041487495255
  46. Gregory Potter, M.D.Salem, OR 973061336256569
  47. Jason Powers, M.D.Portland, OR 972271033222609
  48. Khola Qamar, M.D.Springfield, OR 974771083974299
  49. Anthony Razzak, M.D.Portland, OR 972201306075692
  50. Aditi ReddyPortland, OR 972391114301124

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.