NPPES file of Aug 9, 2026

Specialist in California

5,749 NPPES records list specialist with a practice address in California, 15 per 100,000 residents, the 19th highest rate of 51. San Francisco and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 72 of 115.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 174400000X · method

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

San Francisco has the most, 666

  1. San Francisco666
  2. Los Angeles301
  3. Sacramento241
  4. San Diego207
  5. Oakland198

Specialist records in California

  1. Dat Nguyen, MDModesto, CA 953561659346435
  2. Doanh Nguyen, M.D.Fountain Valley, CA 927081720090921
  3. Duc Nguyen, MDRedwood City, CA 940621013013416
  4. Ha NguyenSanta Ana, CA 927051346059219
  5. Hai Nguyen, MDSan Jose, CA 951271619022431
  6. Hien Nguyen, MDMilpitas, CA 950351871556969
  7. Jennifer NguyenSan Francisco, CA 941021518231687
  8. Joanne NguyenLong Beach, CA 908081467047837
  9. Kim NguyenSan Jose, CA 951261750099156
  10. Lan Nguyen, M.D.San Jose, CA 951161174516264
  11. Linh Dan Nguyen, M.D.Fountain Valley, CA 927081619932506
  12. Nguon NguyenSan Jose, CA 951221205397106
  13. Quan Nguyen, M.D.Fountain Valley, CA 927081760402770
  14. Quang NguyenOakland, CA 946121720406481
  15. San Nguyen, MDAlhambra, CA 918011194738849
  16. Sean NguyenSan Francisco, CA 941031154519635
  17. Stephanie NguyenSan Francisco, CA 941031669870168
  18. Stephen Nguyen, MDFremont, CA 945381912022443
  19. Thanh Nguyen, M.D.Westminster, CA 926831205987161
  20. Thiet NguyenHuntington Beach, CA 926461427323831
  21. Thuong Nguyen, DPTLos Angeles, CA 900281336325406
  22. Toan Nguyen, M.D.Long Beach, CA 908061639129711
  23. Tuyet Thao NguyenSacramento, CA 958171457236986
  24. Van Nguyen, FITTERLarkspur, CA 949391871634022
  25. Kai Ni, M.D.Sacramento, CA 958161588675847
  26. Aoibhin Ni DhubhaunSan Francisco, CA 941161114559788
  27. Diva NiaziPleasanton, CA 945881093580367
  28. Zahid Niazi, M.D.Elk Grove, CA 956241245345941
  29. Nida Nicasio, M.D.Irvine, CA 926181881803773
  30. Michael Niccole, M.D.Newport Beach, CA 926251801010475
  31. Elisa Nicholas, M.DLong Beach, CA 908061013102581
  32. Michael NicholasModesto, CA 953511972465631
  33. Maya Nicholls, CMTPetaluma, CA 949521356601033
  34. Sarah NicholsAlta, CA 957011255450094
  35. Wesley Nichols, M.D.West Hollywood, CA 900481609817717
  36. Lesley NicholsonCypress, CA 906301801169875
  37. Lowell Nickel, M.D.Oroville, CA 959661154429520
  38. Beverly Nickerson, N.PLong Beach, CA 908061952486243
  39. Edward Nickerson, RPTSacramento, CA 958161992820518
  40. Frederic Nicola, M. D.Marina Del Rey, CA 902921184736480
  41. Anthony Nicoletti, P.T.Redwood City, CA 940621043258965
  42. Charles Niesen, M.D.Pasadena, CA 911061710915830
  43. Stacey Nijst, CADCA, CCJPSanta Ana, CA 927061770746539
  44. Soheil Niku, MDSimi Valley, CA 930651114994274
  45. Miriam Nino, LICENSED LIFE COACHChula Vista, CA 919151871971853
  46. Karen Nishimura, OTCarlsbad, CA 920091356451298
  47. Jonathan Nissanoff, MDPoway, CA 920641134135155
  48. Bernard Nkemere, DPO 11Los Angeles, CA 900441720228554
  49. Nadia Nodoust-Christensen, MDManhattan Beach, CA 902661497353239
  50. Devin Nogaki, C.S.P.C.Montrose, CA 910201912148891

Source: CMS NPPES, primary taxonomy 174400000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 19 of 51 per resident

  1. Massachusetts16
  2. West Virginia15
  3. Maryland15
  4. California15
  5. Minnesota15
  6. Delaware13
  7. 50 states and D.C.18

Source: CMS NPPES, primary taxonomy 174400000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

29.6% of these records appear in a Medicare file, against 17.0% 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. California29.6%
  2. United States17.0%

Specialist records in California, measured

  • In a Medicare file1,704 of 5,749 · 29.6% here, 17.0% nationally
  • In the CMS Doctors and Clinicians file1,076 · 18.7% here, 11.1% nationally
  • Not updated in five years or more4,403 · 76.6% here, 77.3% nationally
  • Median graduation year1989 · the 1,075 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 174400000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

5,749 NPPES records list specialist (174400000X) as their primary taxonomy with a practice address in California: 15 per 100,000 residents against 18 nationally (50 states and D.C.). San Francisco has 666 of them (12%).

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. Florida2,685
  2. Washington2,609
  3. Pennsylvania2,031
  4. Texas1,716

States with a similar rate per 100,000

  1. Minnesota14.6
  2. Maryland15.2
  3. West Virginia15.4
  4. Massachusetts15.7

The largest states

  1. New York22,636
  2. Florida2,685
  3. Washington2,609
  4. Pennsylvania2,031
  5. Texas1,716

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.