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 2 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. Janno Ancheta, COTA/LReseda, CA 913351679242085
  2. Amber Anderson, COTA/LPleasanton, CA 945661780047407
  3. Lindsey Anderson, COTA/LSusanville, CA 961301598165979
  4. Nadine AnguloGarden Grove, CA 928431578230439
  5. Edwin Angulo Torres, OTA/LHemet, CA 925431730577156
  6. Nicole Ann Aniag, COTA/LDowney, CA 902411841923901
  7. Cristina Annarella, COTAIrvine, CA 926021760829964
  8. Patricia AntonelliWatsonville, CA 950761194465369
  9. Michael Antonino, COTA/LFresno, CA 937101134665151
  10. Michelle Aparicio, COTA/LTemecula, CA 925901851060958
  11. Lindsey AphessetcheAnaheim, CA 928081629579198
  12. Florita ApolonioAnaheim, CA 928041740676733
  13. Grace Appel, COTASusanville, CA 961301922707389
  14. Wendy Aquino CastroGarden Grove, CA 928431053951947
  15. Marcella Aragon, COTAFresno, CA 937101316474943
  16. Annacess ArcadioFullerton, CA 928331538557871
  17. Jessica Arellano, COTA/LLake Forest, CA 926301487487153
  18. Joy ArenasMontebello, CA 906401932810702
  19. Alexander Arias, COTA/LVan Nuys, CA 914051871074070
  20. Erika AriasBellflower, CA 907061225737794
  21. Stephanie AriasSacramento, CA 958411003650631
  22. Cristian Armenta IbarraFontana, CA 923351003467929
  23. Megan ArmstrongNorthridge, CA 913431477394815
  24. Camille ArnoldCarmichael, CA 956081952244592
  25. Stacey ArnottSanta Monica, CA 904041982093050
  26. Leticia ArredondoVacaville, CA 956881578380663
  27. Melissa ArreolaBaldwin Park, CA 917061043712656
  28. Daniel Arroyo, COTASan Diego, CA 921161881373819
  29. Hillary ArroyoSan Diego, CA 921031467390211
  30. Marisol ArroyoWhittier, CA 906021831860766
  31. Teresa Arteaga, COTATemecula, CA 925901629677505
  32. Tisha Arzaluz, COTAFairfield, CA 945331265871479
  33. Judith Arzu, COTALos Angeles, CA 900471740670132
  34. Catherine Asher, COTA/LFountain Valley, CA 927081407654593
  35. Kimberly Ashley, COTA/LSan Diego, CA 921271992193528
  36. Shiva Ashrafzadeh, COTARancho Palos Verdes, CA 902751457075467
  37. Behnoush AtashzabanSacramento, CA 958331720959786
  38. Dawn AtkinsonSan Jose, CA 951201821246265
  39. Richard Atterberry, COTA/LLong Beach, CA 908061982092094
  40. Jonathan Austria, COTA/LLos Angeles, CA 900271891464608
  41. Grit AvellarLodi, CA 952421972393429
  42. Lyndsey Avery, COTASacramento, CA 958171164730545
  43. Jesse Ayers, COTALos Angeles, CA 900341275363152
  44. Ryan Ayers, COTA/LPittsburg, CA 945651528629896
  45. Sherilyn Back, COTA/LRedding, CA 960011598121030
  46. Teresa Baehner, COTASan Diego, CA 921231225895295
  47. Leslie BaghdadiPasadena, CA 911071336538602
  48. Mark BakerBrisbane, CA 940051477178291
  49. Briar Baking, COTA/LWest Covina, CA 917901184330714
  50. Erin Bakke, COTAMorgan Hill, CA 950371306216031

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.