NPPES file of Aug 9, 2026

Occupational Therapy Assistant in California

1,869 NPPES records list occupational therapy assistant with a practice address in California, 5 per 100,000 residents, the 49th highest rate of 51. San Diego and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 36 of 38.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 224Z00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

San Diego has the most, 124

  1. San Diego124
  2. Los Angeles105
  3. Sacramento56
  4. Anaheim43
  5. Long Beach43

Occupational Therapy Assistant records in California

  1. Alville VertudezWalnut Creek, CA 945961487161949
  2. Sean VictoriaBaldwin Park, CA 917061295190866
  3. Michael Vidal, COTA/LLong Beach, CA 908061790391415
  4. Maria VielmasMontebello, CA 906401699432633
  5. Sergio Vigil, COTA/LReedley, CA 936541487307591
  6. Rebecca Villa, COTASan Diego, CA 921161508284415
  7. Laura VillaescusaSan Diego, CA 921031285572735
  8. Shehrazad VillafloresBrea, CA 928211770969867
  9. Edith Villagomez, COTA/LVacaville, CA 956871568127355
  10. Byron Villagran, COTALaguna Hills, CA 926531427754050
  11. Araceli VillagranaReedley, CA 936541427381995
  12. Wendy Villalobos, COTA/LAlhambra, CA 918031538891007
  13. Angelica VillanuevaBerkeley, CA 947031306574157
  14. Colleen Vincent, COTASan Rafael, CA 949031982865689
  15. Stacey Vingerelli, C.O.T.A./L.Fullerton, CA 928321023306271
  16. Cassidy VinkFresno, CA 937271023857083
  17. Patricia Virata, COTA/LFullerton, CA 928311922464098
  18. Ariana Vista, OTAPala, CA 920591871153676
  19. Carolyn VoChino, CA 917101083184014
  20. Heather Volpe, COTASan Luis Obispo, CA 934011649923814
  21. Maryann Von Kluegl, COTASantee, CA 920711063283034
  22. John VoytkoChico, CA 959281205689262
  23. Diane Vu, COTA/LGarden Grove, CA 928441053894212
  24. Hai Mi VuCovina, CA 917231578256467
  25. Jayden VuLos Angeles, CA 900081346842259
  26. Noah Vutheikun, COTA/LMontclair, CA 917631811720329
  27. Anish Vyas, COTA/LFremont, CA 945361083407472
  28. Kathleen Wachter, COTAMission Viejo, CA 926911053693259
  29. Theresa WahlenmaierAnaheim, CA 928041720476286
  30. Erica Waldor, COTA/LFair Oaks, CA 956281760316111
  31. Clifton Walker, COTAVentura, CA 930331477757789
  32. Freddie WalkerMadera, CA 936371952791675
  33. Linda WalkerFontana, CA 923351659935658
  34. Fallon Wallace, COTAHayward, CA 945411659912756
  35. Ashley WallsCovina, CA 917231053194985
  36. Gary Wallum, COTA/LSan Diego, CA 921031730427089
  37. Samantha Walrath, COTA/LLos Angeles, CA 900101811589609
  38. Julia Walston, AALynwood, CA 902621366175481
  39. Heather Walters, COTA/LFresno, CA 937111326811225
  40. Marc WaltonConcord, CA 945191215116017
  41. Grace Wan, COTA/LAnaheim, CA 928081457083792
  42. Adrienne Wardlaw, COTA/LIrvine, CA 926181568344976
  43. Marisa Warner, COTA/LOakland, CA 946011386073948
  44. Brittney Warren, COTALake Elsinore, CA 925301356878078
  45. Stephanie Wason, COTA/LFullerton, CA 928311467116509
  46. James WatkinsVacaville, CA 956871114778800
  47. Lisa WatsonLos Angeles, CA 900161548658859
  48. Kaylee Watt, COTAHighland, CA 923461790673770
  49. Rianna WattsWhittier, CA 906021043002140
  50. Max Wayman-ArndtLos Altos, CA 940221922553270

Source: CMS NPPES, primary taxonomy 224Z00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 49 of 51 per resident

  1. Alabama5
  2. Georgia5
  3. Louisiana5
  4. California5
  5. District of Columbia4
  6. Utah4
  7. 50 states and D.C.12

Source: CMS NPPES, primary taxonomy 224Z00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

0.1% of these records appear in a Medicare file, against 0.1% 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. California0.1%
  2. United States0.1%

Occupational Therapy Assistant records in California, measured

  • In a Medicare file2 of 1,869 · 0.1% here, 0.1% nationally
  • In the CMS Doctors and Clinicians file2 · 0.1% here, 0.1% nationally
  • Not updated in five years or more1,080 · 57.8% here, 72.0% nationally

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 224Z00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

1,869 NPPES records list occupational therapy assistant (224Z00000X) as their primary taxonomy with a practice address in California: 5 per 100,000 residents against 12 nationally (50 states and D.C.). San Diego has 124 of them (7%).

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. Pennsylvania2,155
  2. Illinois1,498
  3. Wisconsin1,460
  4. North Carolina1,357

States with a similar rate per 100,000

  1. Louisiana4.9
  2. Georgia5.1
  3. District of Columbia4.1
  4. Alabama5.5

The largest states

  1. Texas4,278
  2. Florida3,825
  3. New York2,732
  4. Ohio2,421
  5. Pennsylvania2,155

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.