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 37 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. Tristika Weaver-Maddox, COTA/LBrentwood, CA 945131255810156
  2. Myla WeibelCardiff, CA 920071053867978
  3. Amber Weidler, COTATemecula, CA 925921386032290
  4. Silvia WeimerStockton, CA 952091003225046
  5. Megan WelchLake Forest, CA 926301629831524
  6. Valerie Welk, MAWest Sacramento, CA 956911538586219
  7. Edna Dulce Weller - Fusco, COTADowney, CA 902421922537893
  8. Kimberly Wells, COTAFresno, CA 937271912403874
  9. Dylan Wesner, COTA/LMontebello, CA 906401275498297
  10. Deborah WestSonoma, CA 954761912855966
  11. Beth WetterMerced, CA 953401821797416
  12. Chavonne WhaleyBrea, CA 928211073328480
  13. Alyssa Whisler, COTA/LApple Valley, CA 923071336082965
  14. Sabrina Wieseler, COTA/LBakersfield, CA 933061386807188
  15. Mathew WilkenNorwalk, CA 906501992471403
  16. Diamond WilliamBrea, CA 928211669045589
  17. Alesa Williams, COTAMarina Del Rey, CA 902921265068654
  18. Cindy WilliamsCorona, CA 928821639567506
  19. Ellie Williams, COTA/LAguanga, CA 925361639941073
  20. Erica WilliamsOceanside, CA 920561376041830
  21. Kelly Williams, COTARedding, CA 960011992867394
  22. Tracy Williams, COTAStockton, CA 952031447864897
  23. Candice WilsonIndio, CA 922011902282478
  24. Thu WinLos Angeles, CA 900341831719749
  25. Katherine WisehartSmith River, CA 955671891243887
  26. Madison Witte, COTA/LSan Rafael, CA 949031790485449
  27. Lisa Wohlers, COTASacramento, CA 958191952179830
  28. Christopher WoldrichSan Diego, CA 921201538090980
  29. Gretchen Wolf, COTASacramento, CA 958171003676586
  30. Gail WolfreyLos Angeles, CA 900361093588618
  31. Lindsey Wolverton, COTAPalm Desert, CA 922111912230103
  32. Emery WongPomona, CA 917671649721556
  33. Jacob Kristofer WongTorrance, CA 905041760238901
  34. Kelsey WongMonterey, CA 939401932911575
  35. Kestrel Wood Hutchison, COTA/LSan Clemente, CA 926731629394861
  36. Yamashika WoodburySanta Monica, CA 904041295123594
  37. Erin Woodhouse, COTALaguna Hills, CA 926531407979362
  38. Stephanie WoodlandLos Angeles, CA 900471124910088
  39. Amanda Woods, COTA/LAnaheim, CA 928051386027993
  40. Michelle WorkmanAlameda, CA 945011013867811
  41. Melissa Wykstra, COTA/LChico, CA 959281689507212
  42. Rachel Wyles-De Ryk, COTARancho Cucamonga, CA 917301700439601
  43. Rebecca XiongClovis, CA 936111205374402
  44. Guissella XolPalmdale, CA 935501609526946
  45. Amber Yambasky, COTA/LSacramento, CA 958351861925117
  46. Jennie YangArcadia, CA 910071578121679
  47. Peter Yang, OTAIrvine, CA 926061952714305
  48. Christopher Yao, OTAGarden Grove, CA 928441538894407
  49. Jeremy Yap, COTA/LDowney, CA 902401881374270
  50. Rosalyn YapGardena, CA 902481487307153

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.