NPPES file of Aug 9, 2026

Internal Medicine Physician in Oklahoma

1,115 NPPES records list internal medicine physician with a practice address in Oklahoma, 28 per 100,000 residents, the 44th highest rate of 51. Oklahoma City and Tulsa have the most; each record links to the provider's NPI and the Oklahoma license search. Page 15 of 23.

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).

Oklahoma City has the most, 418

  1. Oklahoma City418
  2. Tulsa307
  3. Norman28
  4. Ada25
  5. Lawton24

Internal Medicine Physician records in Oklahoma

  1. Elizabeth Mutzig, M.D.Tulsa, OK 741141922211606
  2. Ajay Nadig, M.D.Oklahoma City, OK 731041831577238
  3. Arslan Naeem, M.D.Midwest City, OK 731301962856773
  4. Raha Nael, MDOklahoma City, OK 731201720128630
  5. Roopesh Nahar, M.D.Tulsa, OK 741041093058802
  6. Ruby Nahar, MDOklahoma City, OK 731041356397053
  7. Nhi Nai, DOOklahoma City, OK 731041508449422
  8. Srikanth Nallacheru, MDOklahoma City, OK 731121316117328
  9. Sowgandhi Nannepaga, M.DTulsa, OK 741331508399437
  10. Meenakshi Narayanaswamy, MDTulsa, OK 741041609449313
  11. Rajiv Narula, MDTulsa, OK 741041881081412
  12. Yusra Nasir, MDOklahoma City, OK 731041164171468
  13. Aiman NaveedOklahoma City, OK 731041275424988
  14. Mudassir Nawaz, MDNorman, OK 730711396737789
  15. Bruce Naylor, MDOklahoma City, OK 731161023340338
  16. Ryan Nazari, DOOklahoma City, OK 731041639004419
  17. Patrick Neff, D.O.Tulsa, OK 741041073053468
  18. Michele Neil, DOTulsa, OK 741331902983661
  19. David Nelson, MDOklahoma City, OK 731121417966623
  20. Don Nelson, M.D.Muskogee, OK 744011982624383
  21. Elizabeth Nettles, D.O.Muskogee, OK 744011831287432
  22. Chris NguyenOklahoma City, OK 731121124478516
  23. Hai Nguyen, M.D.Tulsa, OK 741041316057326
  24. Khang Nguyen, DOTulsa, OK 741351740880475
  25. Long Nguyen, M.D.Oklahoma City, OK 731121811956006
  26. Thuy Nguyen, M.D.Oklahoma City, OK 731121528137304
  27. Ardeshir Nia, MDIdabel, OK 747451902822802
  28. Robert Niebergall, MDBroken Arrow, OK 740121912975012
  29. Cathy Nieman, MDStillwater, OK 740741578556171
  30. David Nierenberg, M.D.Tulsa, OK 741041851352512
  31. Paul Nioce, M.D.Lawton, OK 735051134313463
  32. Carol Njoki, MDMidwest City, OK 731101164984993
  33. Hayden Novak, MDTulsa, OK 741041508276601
  34. Sanober Nusrat, MDOklahoma City, OK 731041326560038
  35. Steven O'Brien, MDOklahoma City, OK 731121841853751
  36. George Obinero, D.O., M.DLawton, OK 735051215169321
  37. William Obrien, M.D.Broken Arrow, OK 740121578524963
  38. Romeo Obsequio, MDMiami, OK 743541508839093
  39. Obiageli Offor, MDOklahoma City, OK 731091063904472
  40. Jonathan Ohenhen, MDSulphur, OK 730861285703249
  41. Kevin Oltmanns, M.D.Stillwater, OK 740741316926728
  42. Mobolaji Olulade, M.D.Oklahoma City, OK 731091093976557
  43. Ashley Ooms, MDOklahoma City, OK 731041972171320
  44. Michael Opoku, M.D.Oklahoma City, OK 731201578520235
  45. Raul Orozco Villalobos, MDOklahoma City, OK 731041487274866
  46. Lisa Ortiz, M.D.Idabel, OK 747451275743684
  47. Luz Ortiz, M.D.Lawton, OK 735071861581183
  48. Steven Orwig, M.D.Oklahoma City, OK 731041215044615
  49. Katelyn Osborn, DOTulsa, OK 741271952004772
  50. Kenneth Ostmo, DOTulsa, OK 741361578026647

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

Oklahoma ranks 44 of 51 per resident

  1. Indiana31
  2. Texas30
  3. Montana29
  4. Oklahoma28
  5. Iowa27
  6. South Dakota27
  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.

76.7% 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. Oklahoma76.7%
  2. United States78.7%

Internal Medicine Physician records in Oklahoma, measured

  • In a Medicare file855 of 1,115 · 76.7% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file654 · 58.7% here, 61.4% nationally
  • Not updated in five years or more621 · 55.7% here, 55.4% nationally
  • Median graduation year2007 · the 653 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

1,115 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in Oklahoma: 28 per 100,000 residents against 44 nationally (50 states and D.C.). Oklahoma City has 418 of them (37%).

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. Puerto Rico1,146
  2. Rhode Island1,033
  3. Kansas1,010
  4. Nevada1,229

States with a similar rate per 100,000

  1. Iowa27.2
  2. South Dakota26.9
  3. Montana28.6
  4. Arkansas25.0

The largest states

  1. California17,696
  2. New York12,067
  3. Florida10,151
  4. Texas9,175
  5. Pennsylvania7,300

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.