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 34 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. Madelaine Claire BustosStanford, CA 943051154882348
  2. Melissa BustosLa Puente, CA 917441275902181
  3. Rachel Buthorne, PA-CLoma Linda, CA 923501225770563
  4. Cheryl Butler, PA-CSan Francisco, CA 941111306248687
  5. John ButlerSanta Maria, CA 934581528741774
  6. Larry Butler, PAVista, CA 920831073138103
  7. Lucy Butler, P.A.French Camp, CA 952311548344948
  8. Marlon Butler, PALos Angeles, CA 900591528280419
  9. Tiffany Butler, PA-CCampbell, CA 950081801222443
  10. Laura Butner, PAVista, CA 920831457752842
  11. Megan ButterworthOakland, CA 946091720557473
  12. Kendall Butz, PHYSICIAN ASSISTANTWalnut Creek, CA 945981801575543
  13. Michael Bux, PA-C, ATCLa Jolla, CA 920371962977561
  14. Viktor Buzin, MPA, PA-CWalnut Creek, CA 945961790023620
  15. Zhanna Byalaya, PAPleasanton, CA 945881083740542
  16. Nicole Byars, P.A-CAntioch, CA 945091215052113
  17. Michele Byk, PA-CBeverly Hills, CA 902111730710187
  18. Pamela Bykowski, PA-CSanta Barbara, CA 931061053851378
  19. Kristen BynonLaguna Hills, CA 926531407207095
  20. Asha ByrdRoseville, CA 956611568035756
  21. Keith Byrd, PHYSICIAN ASSISTANTTracy, CA 953771720555352
  22. Kristin Byrd, PA-CEureka, CA 955031174202980
  23. Margaret Byrne, PASan Francisco, CA 941111871902411
  24. Shannon Byrnes, PA-CStanford, CA 943051942827092
  25. Bianca Bzdel, PA-CDublin, CA 945681093225211
  26. Sara Caan Van Leeuwen, PA-CCulver City, CA 902321255577888
  27. Daniel Caballero, P.A-CRiverside, CA 925011659487890
  28. Janessa Rose CaballeroVallejo, CA 945921225632979
  29. Maria Caballero, PA-CAnaheim, CA 928051942417365
  30. Nancy Caballero, PA-CStanford, CA 943051407317803
  31. Veronica Caballero, PA-CFremont, CA 945381366694630
  32. Byron Caballeros, PA-CThousand Oaks, CA 913601578091575
  33. Daniel Cabanero, PA-CLaguna Hills, CA 926531801525472
  34. Tana CabanillasCarson, CA 907461134907652
  35. Maria Cristina Cabe, PA-CMountain View, CA 940401760067276
  36. Daniel Cable, PA-CArroyo Grande, CA 934201124355441
  37. Anna Maria Cabrera, PA-CModesto, CA 953541679809040
  38. Cristian Cabrera, PALoma Linda, CA 923501225861172
  39. Heather Cabrera, PA-CRedlands, CA 923741407371602
  40. Karla Cabrera, P.A.El Centro, CA 922431932191434
  41. Mervin Cabrera, PASacramento, CA 958111255091138
  42. Sydnee Cabrera, PA-CFullerton, CA 928311043997323
  43. Anthony Cacioppo, PA-CLos Angeles, CA 900371760268502
  44. Jaimer Cadang, PA-CTemecula, CA 925901750562906
  45. Cristina Cadena, PA-CClaremont, CA 917111942733514
  46. Michael Cadette, PA-CWalnut Creek, CA 945981689075236
  47. Adam Cady, ATC,CSCS,PA-CWoodland Hills, CA 913671407034317
  48. Christina Cady, PA-CVenice, CA 902911972974269
  49. Leslie Cady, P.A.-CSanta Rosa, CA 954051952586547
  50. Lily Caesar, P.A.Vista, CA 920831518184266

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.