NPPES file of Aug 9, 2026

Internal Medicine Physician in Pennsylvania

7,300 NPPES records list internal medicine physician with a practice address in Pennsylvania, 56 per 100,000 residents, the 11th highest rate of 51. Philadelphia and Pittsburgh have the most; each record links to the provider's NPI and the Pennsylvania license search. Page 82 of 146.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · 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, 1,855

  1. Philadelphia1,855
  2. Pittsburgh750
  3. Allentown218
  4. Harrisburg184
  5. York164

Internal Medicine Physician records in Pennsylvania

  1. Faisal MasoodPhiladelphia, PA 191041962253468
  2. Ala Masri, M.D.Philadelphia, PA 191311174960066
  3. Lawrence Mass, MDLower Gwynedd, PA 190021316943830
  4. Daniel Mast, D.O.Lancaster, PA 176021104910140
  5. Nidhi Master, M.D.Wynnewood, PA 190961487910741
  6. Rebecca Masters, MDHershey, PA 170331205885332
  7. Darlene Mata, DOAllentown, PA 181031801586037
  8. Alexis MatarangasMilton, PA 178471679033658
  9. Victoria Matasy, MDPittsburgh, PA 152201184612475
  10. Firdausi Matawalle, MDEnola, PA 170251568086932
  11. Susan Mather, MDPhiladelphia, PA 191071790717031
  12. Bradley MathersHershey, PA 170331811263783
  13. Amanda Matheson, MDPhiladelphia, PA 191071144886755
  14. Ashley Mathew, MDPhiladelphia, PA 191401871384172
  15. Don MathewMcKeesport, PA 151321225581002
  16. Elizabeth Mathew, MDBethlehem, PA 180151770747537
  17. James Mathew, MDPhiladelphia, PA 191311669009981
  18. Mathew Mathew, MDConshohocken, PA 194281861473985
  19. James Mathews, DOButler, PA 160011477523140
  20. Raymond Mathews, MDHanover, PA 173311710980719
  21. James Mathis, M.D.Philipsburg, PA 168661982620225
  22. Andrea Matho, M.D.Philadelphia, PA 191041881039782
  23. Lauren Mathos, DOPittsburgh, PA 152241285097550
  24. Christopher Mathur, DOBethlehem, PA 180201992760599
  25. Lauren Matlack, MDPhiladelphia, PA 191401295574168
  26. Roman Matlaga, DOWilkes Barre, PA 187021881688315
  27. Stephen Matse, DOJohnstown, PA 159041427054642
  28. Jokichi Matsubara, MDPhiladelphia, PA 191401306689427
  29. Dennis Mattei, MDTunkhannock, PA 186571366404048
  30. Andrew Matthews, M.D.Feasterville Trevose, PA 190531699935957
  31. Andrew Matthews, MDPhiladelphia, PA 191041053760009
  32. Tamia Matthews, CRNPPhiladelphia, PA 191411043535800
  33. Isaac Matthias, MDPhiladelphia, PA 191041689932584
  34. Mia Mattioli, MDEaston, PA 180451659765766
  35. Mark Mattison, M.D.Danville, PA 178221730347444
  36. Faith Matzoni, DOHarrisburg, PA 171121508813288
  37. Jeffrey Matzoni, DOMechanicsburg, PA 170551023007267
  38. Andrew Maul, MD, MBAPittsburgh, PA 152131366061210
  39. Russell Maulitz, MDPhiladelphia, PA 191031396789194
  40. Benjamin Mauri, MDBryn Mawr, PA 190101972242709
  41. Stephanie MaximousPittsburgh, PA 152131205063641
  42. Kim May, MDPhiladelphia, PA 191321508840737
  43. Nathalie May, MDPhiladelphia, PA 191071922051515
  44. Stanley MayPittsburgh, PA 152351003881731
  45. Ryan Mayo, MDEast Norriton, PA 194031417301995
  46. Valerie Mayorga Huallpa, MDPhiladelphia, PA 191401902796329
  47. Leslie Mayro, M.D.Philadelphia, PA 191491003829508
  48. Saad MazharYork, PA 174031174413256
  49. Dalal Mazraeh, M.DMcKeesport, PA 151321588015564
  50. Lydia Mazze, MDPhiladelphia, PA 191401598505224

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

Pennsylvania ranks 11 of 51 per resident

  1. Delaware58
  2. Illinois58
  3. Michigan57
  4. Pennsylvania56
  5. Vermont50
  6. Oregon50
  7. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

77.9% of these records appear in a Medicare file, against 78.7% 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. Pennsylvania77.9%
  2. United States78.7%

Internal Medicine Physician records in Pennsylvania, measured

  • In a Medicare file5,684 of 7,300 · 77.9% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file4,212 · 57.7% here, 61.4% nationally
  • Not updated in five years or more4,115 · 56.4% here, 55.4% nationally
  • Median graduation year2008 · the 4,208 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

7,300 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in Pennsylvania: 56 per 100,000 residents against 44 nationally (50 states and D.C.). Philadelphia has 1,855 of them (25%).

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. Illinois7,238
  2. Massachusetts6,825
  3. Michigan5,735
  4. Texas9,175

States with a similar rate per 100,000

  1. Delaware58.1
  2. New York61.7
  3. Vermont50.4
  4. American Samoa50.1

The largest states

  1. California17,696
  2. New York12,067
  3. Florida10,151
  4. Texas9,175
  5. Illinois7,238

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.