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 40 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. Bella Caster, PA-CMountain View, CA 940401811162761
  2. Arturo Castillo, PACLos Angeles, CA 900571073820528
  3. Cassandra Castillo, PA-CVan Nuys, CA 914051316871296
  4. Clarissa Castillo, PASan Ysidro, CA 921731871506378
  5. Jaymee Castillo, PA-CFountain Valley, CA 927081417429705
  6. Jeffrey Castillo, PA-CPomona, CA 917671063361244
  7. Nicole CastilloPomona, CA 917661245934967
  8. Patricia Castillo, PAChula Vista, CA 919111376550657
  9. Roger Castillo, PA-CWalnut Creek, CA 945971134235773
  10. Veronica Castillo, PALa Puente, CA 917441578737995
  11. Lizette Castillo AlvarezWoodlake, CA 932861326993486
  12. Rey Castillo Emmanuelli, PALa Verne, CA 917501003622317
  13. Jocelyn Castillo-FarfanSanta Maria, CA 934541710773544
  14. Cara CastillouVallejo, CA 945921164202214
  15. Alyssa Castle, PAMission Viejo, CA 926911356958425
  16. Anne Castle, P.A.Santa Ana, CA 927051669424206
  17. Gregory CastleSanta Maria, CA 934581700669306
  18. Julie Castner, PARocklin, CA 956771508357435
  19. Genessis CastorenaLos Angeles, CA 900591306518972
  20. Alaina Castro, PA-CStanford, CA 943051679283469
  21. Arturo Castro, PALos Angeles, CA 900171699867085
  22. Eisen CastroDuarte, CA 910101316334238
  23. Gabriela Castro, PA-CMartinez, CA 945531215895412
  24. Lupita Castro, PA-CTorrance, CA 905051104624212
  25. Miguel Castro, PA-CSanger, CA 936571164985404
  26. Mitchell Castro, P.A.Glendale, CA 912051669421749
  27. Yomeri CastueraSan Bernardino, CA 924041932700200
  28. Stefenie CasutoEscondido, CA 920291023467065
  29. Melanie Catalano, P.A.Redding, CA 960011013342419
  30. Leila Cataldi, PA-CSanta Rosa, CA 954091700555299
  31. Laura Cataldo, PA-CSacramento, CA 958161447582119
  32. Jessica Cataldo-RamirezVentura, CA 930031922642115
  33. Ryan Cates, PA-CPleasanton, CA 945881053782920
  34. Adam Catevenis, PA-CSanta Barbara, CA 931011215482179
  35. Rachel Catevenis, PA-CSanta Barbara, CA 931051225583735
  36. Amie CatonSacramento, CA 958171720888258
  37. Scott Catone, P.A.Kerman, CA 936301417175498
  38. Genevieve Causey, PA-CIrvine, CA 926181407485675
  39. Nazaneen Cauthron, PA-CSimi Valley, CA 930651851693451
  40. Erin Cava, PA-C, RDOakland, CA 946091225351620
  41. Christine Cavanaugh, PATurlock, CA 953801871548115
  42. Morgan CavanaughSan Francisco, CA 941021932960986
  43. Kendra Cavazo, PA-CLong Beach, CA 908031154631257
  44. Steven Cavella, PA-CStanford, CA 943051053875328
  45. Kaitlyn Cavet, PA-COakland, CA 946021053231373
  46. Emily Caveza, PARedding, CA 960011780140137
  47. Kathleen Anne Cawley, PAMountain View, CA 940401639226137
  48. Justin CayasPomona, CA 917671881406189
  49. Celeste Cayco, PACFresno, CA 937201134221906
  50. Nancy Cayler, PA-CGreenville, CA 959471861545428

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.