NPPES file of Aug 9, 2026

Orthopaedic Surgery Physician in California

2,276 NPPES records list orthopaedic surgery physician with a practice address in California, 5.8 per 100,000 residents, the 49th highest rate of 51. Los Angeles and San Diego have the most; each record links to the provider's NPI and the California license search. Page 30 of 46.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207X00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Los Angeles has the most, 187

  1. Los Angeles187
  2. San Diego154
  3. San Francisco121
  4. Sacramento79
  5. La Jolla55

Orthopaedic Surgery Physician records in California

  1. Norman Nakata, M.D.Torrance, CA 905021467482547
  2. Roland Nakata, MDLodi, CA 952401598871170
  3. Dhiren Nanavati, MDStockton, CA 952101013095918
  4. Steven Narvy, M.D.Encino, CA 914361770868986
  5. Martin Nation, MDOrange, CA 928671548494248
  6. Douglas Navasartian, M.D.Redding, CA 960011356780944
  7. Samir Nayyar, MDVictorville, CA 923951063703270
  8. Alexander Nazareth, MDOrange, CA 928681649733460
  9. Peter Neblett, M.D.Roseville, CA 956611578636593
  10. Norman Nedde, M.D.Los Gatos, CA 950301487713475
  11. Allen Nedley, MDLoma Linda, CA 923541154828234
  12. John Nelligan, MDSonora, CA 953701952491151
  13. Deborah Nelson, MDSan Diego, CA 921031447003470
  14. Robert Nelson, OT-CEncinitas, CA 920241841384385
  15. Scott Nelson, M.D.Loma Linda, CA 923541790876480
  16. Douglas Nestorovski, MDLos Angeles, CA 900331568812774
  17. Christopher Neubuerger, MDSacramento, CA 958191023103793
  18. Mark Newman, M.D.Newport Beach, CA 926631689710360
  19. Peter Newton, MDBeverly Hills, CA 902111386696730
  20. Peter Newton, M.D.San Diego, CA 921231023189883
  21. Damon Ng, MDWalnut Creek, CA 945961538324140
  22. Bob Nguyen, MDSanta Clara, CA 950511477630317
  23. Lan Nguyen, D.O.San Diego, CA 921211184785016
  24. Matthew Nguyen, MDRedlands, CA 923741770957458
  25. Thomas Nguyen, M.D.San Diego, CA 921111811307069
  26. Jake Ni, MDWoodland, CA 956951639497316
  27. Constantine Nicholas, MDMartinez, CA 945531295790228
  28. Jack Nichols, MDRedding, CA 960011528007036
  29. Ena Nielsen, MDSan Diego, CA 921231942761101
  30. Michael Nielsen, M.D.Sacramento, CA 958161104921246
  31. Evan Nigh, MDLos Angeles, CA 900481316409774
  32. Christopher Ninh, MDIrvine, CA 926141700096393
  33. Teodoro Nissen, M.D.Vallejo, CA 945891699791053
  34. Richard Nolan, M DAlameda, CA 945011073588836
  35. Edward Nomoto, MDLos Angeles, CA 900481861683245
  36. Donald Norquist, MDPasadena, CA 911071831191410
  37. Tom Norris, MDSan Francisco, CA 941151376723429
  38. Mark Northfield, MDPetaluma, CA 949541861406316
  39. Wesley Nottage, M.D.Laguna Hills, CA 926531235182924
  40. Paul Nottingham, M.D.Walnut Creek, CA 945961659390920
  41. Paul Nugent, M.DFresno, CA 937201720034077
  42. Carl Nunziato, M.D.Lemoore, CA 932461750815320
  43. Melvin Nutig, MDBeverly Hills, CA 902111386716322
  44. Michael Nuzzo, MDCapitola, CA 950101265583587
  45. Kenneth NwosuTorrance, CA 905021548543853
  46. Airell Nygaard, M.D.Sonora, CA 953701417920760
  47. Stephen O'Connell, M.D.Rancho Mirage, CA 922701831114966
  48. Richard O'Donnell, MDSan Francisco, CA 941151508813874
  49. James O'HaraFresno, CA 937201225449135
  50. Ryan O'Leary, MDSan Diego, CA 921031053848978

Source: CMS NPPES, primary taxonomy 207X00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 49 of 51 per resident

  1. Tennessee6.6
  2. Florida6.5
  3. Arizona6.2
  4. California5.8
  5. Nevada5.1
  6. Texas5.0
  7. 50 states and D.C.7.4

Source: CMS NPPES, primary taxonomy 207X00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

74.0% of these records appear in a Medicare file, against 76.5% 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. California74.0%
  2. United States76.5%

Orthopaedic Surgery Physician records in California, measured

  • In a Medicare file1,684 of 2,276 · 74.0% here, 76.5% nationally
  • In the CMS Doctors and Clinicians file1,347 · 59.2% here, 62.5% nationally
  • Not updated in five years or more1,493 · 65.6% here, 56.8% nationally
  • Median graduation year2003 · the 1,347 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207X00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

2,276 NPPES records list orthopaedic surgery physician (207X00000X) as their primary taxonomy with a practice address in California: 5.8 per 100,000 residents against 7.4 nationally (50 states and D.C.). Los Angeles has 187 of them (8%).

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. Texas1,514
  2. Florida1,470
  3. New York1,339
  4. Pennsylvania1,253

States with a similar rate per 100,000

  1. Arizona6.2
  2. Nevada5.1
  3. Tennessee6.6
  4. Alabama6.7

The largest states

  1. Texas1,514
  2. Florida1,470
  3. New York1,339
  4. Pennsylvania1,253
  5. Illinois995

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.