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 193 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. Isaac Ortega Endahl, P.A.-C.San Diego, CA 921541033514500
  2. David Ortega-EndahlLaguna Hills, CA 926531336526557
  3. Nicholas Ortenzo, PABellflower, CA 907061649328576
  4. Carolyn Ortiz, PAEl Monte, CA 917321679619514
  5. Eric OrtizFullerton, CA 928311629543392
  6. Ernest Ortiz, PA-CVenice, CA 902911275889735
  7. Gabriela Ortiz, PA-CHuntington Park, CA 902551326803347
  8. Orlando Ortiz, PA-CFontana, CA 923361710713953
  9. Emily Orwig, PA-CLa Jolla, CA 920371992484448
  10. Ekhator Osagiede, P.A.-CInglewood, CA 903021881783934
  11. Katherine Osaki, PA-CEl Centro, CA 922431467761486
  12. Peggaysha Osanna, PA-CLos Angeles, CA 900451073735940
  13. Christopher OsbornHarbor City, CA 907101437467966
  14. Cody OsbornMonterey, CA 939401669061297
  15. Grace Osborn, PAOakland, CA 946091194496265
  16. Ellen Osborne, PAParamount, CA 907231023203569
  17. Alexis Osby, PA-CLos Angeles, CA 900371801535471
  18. Kyle Oscarson, PA-CMoreno Valley, CA 925551285407742
  19. Brittany OsgoodSalinas, CA 939011477314474
  20. Olatunde Oshikoya, PA-CSan Francisco, CA 941111487130878
  21. Heather Oshiro, P.A.-CFountain Valley, CA 927081487023222
  22. Kameko Oshiro, PALaguna Hills, CA 926531225780059
  23. Esperanza Ospina, PAPleasant Hill, CA 945231396968582
  24. Abigail OstadAlhambra, CA 918031164279493
  25. Holly OstovarWest Hollywood, CA 900481720948631
  26. Anita Ostrowski, PACarmichael, CA 956081518364405
  27. Beth Osweiler, PA-CRidgecrest, CA 935551427458223
  28. Shahnaz Otanian, P.A.-CSalinas, CA 939061235211459
  29. Shadde OthmanPomona, CA 917661700376324
  30. Loren Ott, PAChico, CA 959261316904428
  31. Michael Otte, PA-CLa Mesa, CA 919421093180432
  32. Brooke Otto, PA-CLaguna Hills, CA 926531881997575
  33. Ryan Otto, PAOakland, CA 946111174845226
  34. Christian Ou, PA-CLos Angeles, CA 900271306495916
  35. Eliza Oun, PA-CElk Grove, CA 957571518325349
  36. Danielle Ovadia, PA-CEncino, CA 913161174411615
  37. Margaret Over, PA-CPleasanton, CA 945661447850649
  38. Tina Overstreet, BA, PA-CFresno, CA 937031417227745
  39. Melody Ow, PA-CMountain View, CA 940401114029634
  40. Jennifer Owen, ATC, PA-CSan Luis Obispo, CA 934011982756052
  41. Michael Owen, PAStanford, CA 943051841800448
  42. Marc Owens, PA-CParadise, CA 959691609915719
  43. Mark Owens, PAWoodland, CA 957761558674531
  44. Patrick Owens, PAChico, CA 959261245930007
  45. Kenneth Oyadomari, PA-CBellflower, CA 907061477001832
  46. Ilona Ozeruga, PA-CCarmichael, CA 956081104371947
  47. Erwin OzoaSacramento, CA 958241932373990
  48. Arielle Paamoni, PA-CLa Mesa, CA 919421326680299
  49. Annette Pablo, PA-CDowney, CA 902401487834016
  50. Bradley Pace, PA-CSanta Paula, CA 930601760902696

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.