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 1 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. Shanon AarupPalm Desert, CA 922111346487758
  2. Deo AbilleBurbank, CA 915021417619396
  3. Olanrewaju Abimbola, COTASacramento, CA 958341265812473
  4. Genevieve Ablola, COTA/LSan Diego, CA 921391336556471
  5. Terence Abram, COTA/LLa Mesa, CA 919421740745975
  6. Christopher AbroginaFullerton, CA 928331740829894
  7. Christine AbucejoRancho Cucamonga, CA 917301780397109
  8. Cristina AcevedoMerced, CA 953401700582558
  9. Keiko Achiwa, COTA/LArcadia, CA 910061750147542
  10. Jobelle Rose Acosta, COTA/LArcadia, CA 910061235062415
  11. Jose Acosta, COTAClovis, CA 936111386123230
  12. Susana Acosta, COTA/LPerris, CA 925711093365587
  13. Krista Adametz, COTA/LModesto, CA 953501528767043
  14. Ma. Alyssa Adorable, COTA/LWestlake Village, CA 913611104403856
  15. Anna Marie AgoncilloSacramento, CA 958251033638192
  16. Elena Aguayo, COTA/LSan Diego, CA 921031619816121
  17. Daisy Aguayo AraizaLong Beach, CA 908071316833312
  18. David Aguero, COTA/LPalmdale, CA 935511699106757
  19. Jinina Aguilar, COTA/LLong Beach, CA 908041649803362
  20. Daniel Aguilar,, COTA/LSanta Fe Springs, CA 906701144718883
  21. Rebecca AguinigaFoothill Ranch, CA 926101033507744
  22. Rylee Agulto, COTASanta Ana, CA 927071437935459
  23. Ashley AgustinRiverside, CA 925011750185997
  24. Carlos AgustinFresno, CA 937221326745753
  25. Siham AhmedOrange, CA 928681427713346
  26. Mevisa AkagawaLake Forest, CA 926301598510109
  27. Oluwademilade AkindeleOceanside, CA 920571013865781
  28. Christina AkpanMonterey, CA 939401487214037
  29. Sidney AlanizFullerton, CA 928311265394340
  30. Grace AlbertGlendale, CA 912081083062897
  31. Benjamin Alcantar, COTABakersfield, CA 933121538805551
  32. Peterfrutts Aldana, COTA/LHayward, CA 945441598366023
  33. Eliana Alderete RomonWhittier, CA 906021508229196
  34. Sharon Aleman, OCTAHuntington Beach, CA 926471326797762
  35. Chrissy AlexanderAnaheim, CA 928041750779740
  36. Gloria Alfieri, COTA/LFullerton, CA 928321184566234
  37. Chriszelle Nina Alfonso, COTA/LLos Angeles, CA 900201174418149
  38. Michelle Alfonso, COTA/LPlacentia, CA 928701013682772
  39. Avid Allard, COTA/CEl Centro, CA 922431508227224
  40. Mia AllenCalabasas, CA 913021770227365
  41. Lorna Alliston, OTARescue, CA 956721326417213
  42. Aniyah Almarez, COTA/LApple Valley, CA 923071710820345
  43. John AlsopRiverside, CA 925061902478423
  44. Robert Alvarado, COTAYuba City, CA 959931164698254
  45. Alma AlvarezMurrieta, CA 925621295441632
  46. Jenny AlvarezSan Diego, CA 921031134067028
  47. Melissa AlvarezGlendale, CA 912041225509813
  48. Andrew AmbrusLancaster, CA 935341497206437
  49. Justin AmmenRosemead, CA 917701972231074
  50. Arden AmorLos Angeles, CA 900671356078893

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.