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 191 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. Angela Okerulu, PASan Francisco, CA 941111760917579
  2. Brittany Okimura, PA-CStanford, CA 943051477984193
  3. Kristin Courtney Okita, PA-CLos Angeles, CA 900271437687530
  4. Chizoba OkodogbeHermosa Beach, CA 902541104751569
  5. Ofili Okolonwamu, N.P., PA-CWoodland, CA 956951033661897
  6. Henry OkonkwoDominguez Hills, CA 907461700929841
  7. Chibuikem Okoro, PATemecula, CA 925911902544240
  8. Lindsay Okowita, PA-CSan Francisco, CA 941431902572852
  9. Oluwaseyi Okusanya, PA-CSacramento, CA 958171306481221
  10. Jamie Okuzawa-Park, PA-CSouth San Francisco, CA 940801619466653
  11. Alexandra Olague, PAConcord, CA 945201801619515
  12. Katryna OlarteLaguna Hills, CA 926531578185757
  13. Taiwo OlawuyiSan Jacinto, CA 925831508739681
  14. Ricky Oldenburg, PA-CWildomar, CA 925951598849374
  15. Kathryn OleskowiczSanta Maria, CA 934541265216295
  16. Matthew Olin, PATorrance, CA 905051124241070
  17. Odilia Olivares, PA-CPacoima, CA 913311457352247
  18. Andrea Olivas, PA-CAuburn, CA 956021083463277
  19. Nicole OlivasCosta Mesa, CA 926261366030546
  20. Samantha Oliveira, PA-C, MS, MPHSan Mateo, CA 944011326449893
  21. Derek OliverVentura, CA 930031386153237
  22. Emma Oliver, PA-CColton, CA 923241033896519
  23. Eric Oliver, PA-CPomona, CA 917661962238410
  24. Melinda Oliver, PA-CSan Diego, CA 921031851647655
  25. Robert Oliver, PARiverside, CA 925081669101119
  26. Ryan Oliver, PA-CLaguna Hills, CA 926531821808460
  27. Tamarrah Oliver, PAFresno, CA 937061730318254
  28. Tara Oliveri, PA-CMurrieta, CA 925631467606913
  29. Pedro Olmedocolor, PA-CLakewood, CA 908051447454814
  30. Tammy Olmstead, P.ASalinas, CA 939061437255429
  31. Ibunkun Olorunoje, PASanta Ana, CA 927051255723797
  32. Ingrid OlsenMountain View, CA 940401881760064
  33. Rachelle Olsen, PA-CLos Angeles, CA 900891174755763
  34. Ahna Olson, P.A.Palo Alto, CA 943011528512225
  35. Elizabeth OlsonBeverly Hills, CA 902101427672955
  36. Inez Olson, PA-C, RRTLos Angeles, CA 900591952016073
  37. Jeanne Olson, PASan Diego, CA 921201902954845
  38. John Olson, P.A.- CTemecula, CA 925921326340225
  39. Josephine Olson, PA-CBakersfield, CA 933121750691242
  40. Kathryn Olson, PA-CStanford, CA 943051841381472
  41. Maryel Olson, PARoseville, CA 956611477602985
  42. Richard Olson, P.A.Anaheim, CA 928061194840603
  43. Robert Olson, P.A-CMarysville, CA 949011932147287
  44. Sarah Olson, PA-CThousand Oaks, CA 913601922571173
  45. Abiodun Oluwatoba, PASanta Maria, CA 934541407667181
  46. Chloe OlveraCarmichael, CA 956081184322026
  47. Ashkon Olyaie, PAUnion City, CA 945871407397326
  48. Jacqueline Olympius, PA-CWalnut Creek, CA 945981578273579
  49. Adam Omahen, PA-CEncinitas, CA 920241770254195
  50. Homira Omar, PALos Angeles, CA 900651144954801

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.