NPPES file of Aug 9, 2026

Emergency Medicine Physician in California

7,751 NPPES records list emergency medicine physician with a practice address in California, 20 per 100,000 residents, the 28th 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 102 of 156.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207P00000X · 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, 632

  1. Los Angeles632
  2. San Diego496
  3. Sacramento369
  4. San Francisco289
  5. Oakland247

Emergency Medicine Physician records in California

  1. Khoa Nguyen, MDLos Angeles, CA 900271447888383
  2. Khoa Nguyen, MDSacramento, CA 958251831277565
  3. Kieu Nguyen, M.DSan Jose, CA 951161881649002
  4. Kim-Tan Nguyen, M.D.Garden Grove, CA 928431174752836
  5. Long Nguyen, M.D.Del Mar, CA 920141538315981
  6. Louis NguyenLos Angeles, CA 900891528646544
  7. Michael Nguyen, MDRancho Mirage, CA 922701760011589
  8. Michelle Nguyen, MDOrange, CA 928681407367618
  9. Peter Nguyen, D.O.Irvine, CA 926181871933366
  10. Randy Nguyen, MDSan Francisco, CA 941101487399085
  11. Reginald Nguyen, MDMountain View, CA 940401144859752
  12. Stephanie Nguyen, DOPleasanton, CA 945881427637792
  13. Steve Nguyen, MDBellflower, CA 907061558433896
  14. Steven Nguyen, DOSan Gabriel, CA 917761891289443
  15. Tan Nguyen, M.D.Hayward, CA 945451437173754
  16. Tao Nguyen, M.D.Fontana, CA 923351598722506
  17. Thien Nguyen, M.D.San Diego, CA 921031689093486
  18. Thien Nguyen, MDRiverside, CA 925011992383152
  19. Thuy Nguyen, MDRancho Cucamonga, CA 917301336162858
  20. Tina Nguyen, MDFontana, CA 923351174789630
  21. Tracy NguyenSacramento, CA 958171588300511
  22. Tuan Nguyen, M.D.Oceanside, CA 920561083600449
  23. Tuan Nguyen, D.O.Anaheim, CA 928061861636037
  24. Vicky Nguyen, M.D.Los Angeles, CA 900241063771566
  25. Jolene Nguyen-Cuu, MDTorrance, CA 905021316697584
  26. Alyssa Nguyen-Phuoc, M.D.Orange, CA 928681558756734
  27. Richard NhoVisalia, CA 932911417586561
  28. Hamid Nia, DOWoodland Hills, CA 913641952824872
  29. Philip Nibley, M.D.Carmichael, CA 956081275910770
  30. Kristen Nichols, MDSacramento, CA 958231063590727
  31. Chase Nicholson, DOSacramento, CA 958171922502913
  32. Carli Nichta, MDVisalia, CA 932911295223295
  33. Edmund Nichter, M.D.West Covina, CA 917901184897910
  34. William Nickerson, MDSacramento, CA 958251326190554
  35. Kenneth Nickson, M.DRiverside, CA 925011477669646
  36. Michael NiechayevVisalia, CA 932911467914770
  37. Michael Niedermeier, MDSacramento, CA 958171558599209
  38. Eric Nielsen, MDSacramento, CA 958231639258767
  39. Katelyn Nielsen, MDRancho Mirage, CA 922701619662848
  40. Michael Nielsen, MDSan Diego, CA 921031255301370
  41. James Niemann, M.D.Torrance, CA 905021669525408
  42. Linnea NierenbergSacramento, CA 958171114506185
  43. Farsheed Nikbakht, M.D.Los Angeles, CA 900251487695433
  44. Karl NimtzWalnut Creek, CA 945961417535600
  45. Scott Ninokawa, MDSan Diego, CA 921031326798273
  46. Alyssa Nip, MDSan Francisco, CA 941431679102685
  47. Kenneth Nisbet, MDLos Angeles, CA 900271154479988
  48. Daniel Nishijima, M.D.Sacramento, CA 958171700084613
  49. Brian Nishinaga, M.D.San Rafael, CA 949031811281702
  50. David Nix, MD, PHDSanta Clara, CA 950511831124775

Source: CMS NPPES, primary taxonomy 207P00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 28 of 51 per resident

  1. Montana21
  2. Arizona20
  3. Kentucky20
  4. California20
  5. Virginia20
  6. North Carolina19
  7. 50 states and D.C.21

Source: CMS NPPES, primary taxonomy 207P00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

80.9% of these records appear in a Medicare file, against 81.5% 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. California80.9%
  2. United States81.5%

Emergency Medicine Physician records in California, measured

  • In a Medicare file6,272 of 7,751 · 80.9% here, 81.5% nationally
  • In the CMS Doctors and Clinicians file4,561 · 58.8% here, 58.7% nationally
  • Not updated in five years or more4,610 · 59.5% here, 54.8% nationally
  • Median graduation year2011 · the 4,560 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207P00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

7,751 NPPES records list emergency medicine physician (207P00000X) as their primary taxonomy with a practice address in California: 20 per 100,000 residents against 21 nationally (50 states and D.C.). Los Angeles has 632 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. New York5,025
  2. Texas4,885
  3. Florida4,034
  4. Pennsylvania3,911

States with a similar rate per 100,000

  1. Virginia19.8
  2. Kentucky20.0
  3. Arizona20.1
  4. North Carolina19.3

The largest states

  1. New York5,025
  2. Texas4,885
  3. Florida4,034
  4. Pennsylvania3,911
  5. Illinois3,291

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.