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 161 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. Daniela Massachi, PAWest Hollywood, CA 900481841886975
  2. Orena Massachi, PALos Angeles, CA 900171417638115
  3. Hanna Massee, PA-CFairfield, CA 945341487298667
  4. Alexandra Massey, PA-CLa Jolla, CA 920371013538776
  5. Marc Massey, PA-CSan Bruno, CA 940661649680364
  6. Barry Massirio, PA-CBakersfield, CA 933091922000355
  7. Christina Massuros, PASimi Valley, CA 930631386305076
  8. Nicole Masters, PA-COrange, CA 928681578082129
  9. Kelliann Masterson, PASan Francisco, CA 941141275046740
  10. Ilaria Mastroserio, PA-CWalnut Creek, CA 945981376197590
  11. Fernando Mata, PACLamont, CA 932411063594117
  12. Imelda MataChico, CA 959731134731268
  13. Wendolyn Matarrese, PAOakland, CA 946011649373952
  14. Alex Matavosian, PA-CThousand Oaks, CA 913601861966418
  15. Lartily Mateo, PA-CSan Francisco, CA 941051124250220
  16. Neal Mathew, PA-CTurlock, CA 953821023769049
  17. Sheron MathewMoreno Valley, CA 925551942816392
  18. James Mathey, P.A.-C.Banning, CA 922201104864933
  19. William Mathias, PA-CSan Marcos, CA 920691285806323
  20. Melenie MatianOakland, CA 946091528911336
  21. Cherryl Matias, PA-CSan Jose, CA 951381154851582
  22. Janice Anne Matias, PA-CNorth Hollywood, CA 916061881949808
  23. Molly MaticeSan Francisco, CA 941151407411853
  24. Kayanna Matlock, PA-CEl Centro, CA 922431831666338
  25. Kristy Matschullat, PA-CFresno, CA 937101063702116
  26. Joshua Matson, PACrescent City, CA 955311982862538
  27. Lisa MatsonGrass Valley, CA 959451578436366
  28. Marianne Matsuguma, PA-CAnaheim, CA 928011972700292
  29. Macy Matsukawa, PA-CDuarte, CA 910101982487310
  30. Joseph MatteraSan Pedro, CA 907321700187234
  31. Mellisa MatthewPomona, CA 917661356272389
  32. Michael MatthewsVista, CA 920811295315125
  33. Troy Matthews, PACulver City, CA 902301487675815
  34. Troy Matthews, PA-CMoreno Valley, CA 925551619738242
  35. Taylor Mattioli, PA-CLa Jolla, CA 920371689146367
  36. Lara MattySanta Maria, CA 934541053903153
  37. Justin MatusalemSan Francisco, CA 941181720651508
  38. Kellie Matusalem, MS, PA-CSan Diego, CA 921111194121954
  39. Michelle Matyseck, PAMontclair, CA 917631093115941
  40. Max Maude, PAOakdale, CA 953611003954694
  41. Elizabeth Maugh, PA-CPico Rivera, CA 906601669556155
  42. Mary Maun-Viduya, PAShafter, CA 932631962663005
  43. Christina MaungRedwood City, CA 940631477021848
  44. Pam Maurer, PAGarden Grove, CA 928401518902782
  45. Oscar Mauriciofaguada, PAPomona, CA 917661033715404
  46. Emmaline Mauritson, PA-CSanta Monica, CA 904041952041972
  47. Tivi Mauro, PACSan Diego, CA 921091770303323
  48. Farhat Mawlavizada, PA-CSan Jose, CA 951161588149199
  49. David Max, PAAnaheim, CA 928071609943471
  50. Adam May, PARedlands, CA 923731164853909

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.