NPPES file of Aug 9, 2026

Gastroenterology Physician in Pennsylvania

1,049 NPPES records list gastroenterology physician with a practice address in Pennsylvania, 8.1 per 100,000 residents, the 7th highest rate of 51. Philadelphia and Pittsburgh have the most; each record links to the provider's NPI and the Pennsylvania license search. Page 14 of 21.

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).

Philadelphia has the most, 220

  1. Philadelphia220
  2. Pittsburgh104
  3. Allentown41
  4. Danville40
  5. Hershey35

Gastroenterology Physician records in Pennsylvania

  1. Scott Myers, MDPhiladelphia, PA 191071407839145
  2. Ahmad Nabatchi, MDFairmount City, PA 162241972583847
  3. Steven Nack, MDFlourtown, PA 190311427096304
  4. Yassin Naga, MDWexford, PA 150901831652973
  5. Jonathan NahasPhiladelphia, PA 191041528485562
  6. Takahiro Nakamura, MDMalvern, PA 193551356831242
  7. Jong Hyun Nam, M.D.Lansdale, PA 194461205805843
  8. Neilanjan Nandi, MDPhiladelphia, PA 191071710188974
  9. Premnath Narahari, MDLebanon, PA 170421669440186
  10. Mechu Narayanan, M.D.Fountain Hill, PA 180151275891053
  11. Sudhir NarlaMcKeesport, PA 151321962448118
  12. Amrit Narula, MDPottsville, PA 179011720050222
  13. Rahul Nathwani, M.D.Philadelphia, PA 191071730204355
  14. Victor Navarro, M.D.Philadelphia, PA 191411407815236
  15. Leela Nayak, M.D.Drexel Hill, PA 190261265607618
  16. David Neiblum, MDWest Chester, PA 193801942269782
  17. Eric NellisAllentown, PA 181041699112359
  18. Gary Newman, M.D.Wynnewood, PA 190961023085990
  19. Brian Ng, MDErie, PA 165071659345387
  20. Khiem Nguyen, MDDu Bois, PA 158011316922511
  21. Minhhuyen Nguyen, M.D.Philadelphia, PA 191111477527547
  22. Toan Nguyen, M.D.Bryn Mawr, PA 190101487685079
  23. Trent Nichols, MDLebanon, PA 170421871585497
  24. Ashley Nickerson, D.O.Port Matilda, PA 168701821450289
  25. Tomasz Niewiarowski, M.D.Bethlehem, PA 180151073624441
  26. Matthew Nikoloff, M.D.Chambersburg, PA 172011912124256
  27. Frederick Nunes, MDPhiladelphia, PA 191061033206032
  28. Steven Nussbaum, MDWest Chester, PA 193801114963345
  29. William O'Toole, M.D.Sellersville, PA 189601467474874
  30. Joshua Obuch, M.D.Wilkes Barre, PA 187021366762148
  31. Pedro Ochoa Allemant, MDPhiladelphia, PA 191041801451778
  32. Jonathan Ohm, M.D.Allentown, PA 181041124447438
  33. Mark Okonski, MDPort Matilda, PA 168701952393209
  34. Babatunde OlaiyaCamp Hill, PA 170111659895282
  35. Jose Oliva, MDPittsburgh, PA 152121306847884
  36. Lisa Oliva, D.O.Pittsburgh, PA 152411982709952
  37. Frances Onyimba, M.D.York, PA 174021578839072
  38. Nicholas Orfanidis, MDPhiladelphia, PA 191071669638573
  39. Mauricio Orrego, MDPhiladelphia, PA 191411376502617
  40. Arleen Ortiz, MDYork, PA 174021437447505
  41. Daisy Ortiz, M.D.East Norriton, PA 194031124040555
  42. Ibukunoluwa Oshobu, MDDanville, PA 178221972289148
  43. Mark Osterman, MDPhiladelphia, PA 191041669526851
  44. Quaadir Otto-SmallwoodHershey, PA 170331447871389
  45. Ann Ouyang, MDHershey, PA 170331104884238
  46. Akinbowale OyalowoPhiladelphia, PA 191041821356957
  47. Fouzia Oza, M.D.Scranton, PA 185101023540861
  48. Michael Pack, MDPhiladelphia, PA 191041477567162
  49. Niranjani Padayachi, MD, MPHYork, PA 174021235621582
  50. Robert Pagano, MDPittsburgh, PA 152411689678054

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

Pennsylvania ranks 7 of 51 per resident

  1. New York9.2
  2. Rhode Island8.8
  3. Maryland8.2
  4. Pennsylvania8.1
  5. Minnesota8.0
  6. New Jersey7.9
  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.

85.0% 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. Pennsylvania85.0%
  2. United States84.4%

Gastroenterology Physician records in Pennsylvania, measured

  • In a Medicare file892 of 1,049 · 85.0% here, 84.4% nationally
  • In the CMS Doctors and Clinicians file769 · 73.3% here, 73.7% nationally
  • Not updated in five years or more664 · 63.3% here, 55.6% nationally
  • Median graduation year2003 · the 769 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

1,049 NPPES records list gastroenterology physician (207RG0100X) as their primary taxonomy with a practice address in Pennsylvania: 8.1 per 100,000 residents against 6.2 nationally (50 states and D.C.). Philadelphia has 220 of them (21%).

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. Illinois887
  2. Ohio741
  3. New Jersey735
  4. Massachusetts686

States with a similar rate per 100,000

  1. Maryland8.2
  2. Minnesota8.0
  3. New Hampshire7.8
  4. Rhode Island8.8

The largest states

  1. California2,140
  2. New York1,797
  3. Florida1,513
  4. Texas1,478
  5. Illinois887

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.