NPPES file of Aug 9, 2026

Physician Assistant in California

14,451 NPPES records list physician assistant with a practice address in California, 37 per 100,000 residents, the 41st 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 218 of 290.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 363A00000X · 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, 935

  1. Los Angeles935
  2. San Diego747
  3. San Francisco488
  4. Stanford480
  5. Sacramento387

Physician Assistant records in California

  1. Kaitlyn RileyFairfield, CA 945331659945749
  2. Michelle Riley, RPA-CBeverly Hills, CA 902121770671554
  3. Rachel Riley, PHYSICIAN ASSISTANTVictorville, CA 923951457640765
  4. Jeremy Rinaldi, PA-CSan Luis Obispo, CA 934011114574159
  5. Joseph Rincon, PA-CLos Angeles, CA 900591578231320
  6. Nicole Rincon, PA-CTuolumne, CA 953791023205903
  7. Edgar Rincon EstrellaWoodland, CA 956951215711254
  8. Juan Riojas, PHYSICIAN ASSISTANTLos Angeles, CA 900251245536333
  9. Amanda RiosSan Bernardino, CA 924041770360364
  10. Ana Rios, PA-CMenifee, CA 925841821242991
  11. Carolina RiosVallejo, CA 945921871365346
  12. Jenny Rios, P.A-CColton, CA 923241346283942
  13. Joseph RiosVallejo, CA 945921417697483
  14. Oscar Rios, PAVisalia, CA 932771114742947
  15. Matthew Rips, PA-CSanta Barbara, CA 931051396451027
  16. Hayley Risse, PAFairfield, CA 945331982352852
  17. Bogdan RisticHercules, CA 945471609463538
  18. Marcus RitaSacramento, CA 958251730042458
  19. Robert Ritchey, PACYuba City, CA 959911952388662
  20. Ryan Ritchie, PARancho Santa Margarita, CA 926881508848128
  21. Bryn Ritter, PA-CFresno, CA 937101932881091
  22. Mollie Ritter, P.A.-CBeverly Hills, CA 902111336170125
  23. Samantha Ritter, PA-CLos Angeles, CA 900281821620477
  24. Benito Rivas, PA-COrosi, CA 936471124099049
  25. Gary Rivas, RD, PA-CEl Monte, CA 917331477895621
  26. Lance Rivas, PAEureka, CA 955031346422821
  27. Nicole Rivas, PA-CDanville, CA 945261356206502
  28. Pamela RivasMonterey Park, CA 917541487335618
  29. Daniel Rivas-Tejada, PAPico Rivera, CA 906601043456973
  30. Alexa RiveraLos Angeles, CA 900481952013435
  31. Alexander RiveraBakersfield, CA 933121114357381
  32. Andres RiveraWasco, CA 932801003490046
  33. Jose Rivera, PACCudahy, CA 902011003937194
  34. Kiana Rivera, PA-CRancho Cucamonga, CA 917301437015310
  35. Lisa Rivera, PA-CEureka, CA 955011467040204
  36. Nicole RiveraVallejo, CA 945921558235820
  37. Rene RiveraSanta Ana, CA 927041023845252
  38. Shannon Rivera, PA-CWest Covina, CA 917901003214297
  39. Victoria Rivera, PACastro Valley, CA 945461194767111
  40. Bibiana Rivera Chavez, PA-CWest Covina, CA 917901457007247
  41. Willie Rivera Landeros, PAMoreno Valley, CA 925551255806535
  42. Mabel Del Pilar Rivera Sagastegui, PA-CSacramento, CA 958211871971580
  43. Rubimar Rivera Vargas, PA-CLos Angeles, CA 900371285387787
  44. Robert Rivers, PA-CUpland, CA 917861801322466
  45. Andrew RizeqTustin, CA 927801649013822
  46. Crystal Rizzo, PA-CFolsom, CA 956301245623297
  47. Anthony RizzutoLos Angeles, CA 900061649842634
  48. Katrina RizzutoAlhambra, CA 918031487365813
  49. Hanna Ro, PA-CFullerton, CA 928351700445640
  50. Jamie Ro, PA-CFremont, CA 945381205169570

Source: CMS NPPES, primary taxonomy 363A00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 41 of 51 per resident

  1. Georgia42
  2. New Mexico40
  3. Illinois39
  4. California37
  5. New Jersey37
  6. Texas36
  7. 50 states and D.C.49

Source: CMS NPPES, primary taxonomy 363A00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

75.2% of these records appear in a Medicare file, against 77.9% 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. California75.2%
  2. United States77.9%

Physician Assistant records in California, measured

  • In a Medicare file10,860 of 14,451 · 75.2% here, 77.9% nationally
  • In the CMS Doctors and Clinicians file7,218 · 49.9% here, 62.6% nationally
  • Not updated in five years or more5,775 · 40.0% here, 39.3% nationally
  • Median graduation year2018 · the 7,214 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 363A00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

14,451 NPPES records list physician assistant (363A00000X) as their primary taxonomy with a practice address in California: 37 per 100,000 residents against 49 nationally (50 states and D.C.). Los Angeles has 935 of them (6%).

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 York15,555
  2. Texas10,999
  3. Florida10,257
  4. North Carolina9,279

States with a similar rate per 100,000

  1. New Jersey36.5
  2. Indiana35.3
  3. Illinois39.3
  4. New Mexico40.1

The largest states

  1. New York15,555
  2. Texas10,999
  3. Florida10,257
  4. North Carolina9,279
  5. Pennsylvania8,020

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.