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 9 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. Loma Denkers, COTAApple Valley, CA 923071396555991
  2. Ma Pilar Francezka Depaz, COTA/LMill Valley, CA 949411104603323
  3. Marline Derilus, COTA/LMonterey, CA 939401023592433
  4. Michael Derose, COTA/LNewport Beach, CA 926601417581646
  5. Stephanie DerouicheLong Beach, CA 908051497643910
  6. Joanne Desiere, COTA/LChula Vista, CA 919111114861655
  7. Lisa Devillers, COTA/LCamarillo, CA 930101881136562
  8. Mary Dewitt, OCCUPATIONAL THERAPILincoln, CA 956481255410767
  9. China Dezubiria, COTAFresno, CA 937101982431409
  10. Ailene DiazRiverside, CA 925011104695238
  11. Angelica Joleen DiazBaldwin Park, CA 917061285317537
  12. Erin DiazGlendora, CA 917411811571938
  13. Rosaura Diaz, COTA/LBellflower, CA 907061285296178
  14. Travis DiazTemecula, CA 925921699273235
  15. Weldon Dienzo, COTA/LNorwalk, CA 906501881214955
  16. Laura Dietrich-WagerSan Diego, CA 921021336509991
  17. Tambralane Dill, COTACarmichael, CA 956081033784004
  18. Anya DillonSan Diego, CA 921031417805748
  19. Louie DimapilesGarden Grove, CA 928411164362232
  20. Rosemarie Dimesio, COTA/LVallejo, CA 945911902375140
  21. Lesley Anne Dimson, COTA/LPasadena, CA 911011083290167
  22. Reinald Dimzon, COTA/LSan Jacinto, CA 925821215738158
  23. Marjorie Diong, COTALong Beach, CA 908061396442729
  24. Eric DipadStockton, CA 952041629643853
  25. Thomas DipalmaArvin, CA 932031518580356
  26. Angela Divinagracia, COTABrea, CA 928211760912679
  27. Blanca Dixon, COTANorwalk, CA 906501952843203
  28. Bobby DoSan Jose, CA 951281811777402
  29. Carmen Do, COTATustin, CA 927801801660543
  30. Mariana Do Nascimento Vieira, COTA/LLos Angeles, CA 900191982577607
  31. Emily DoddsSan Diego, CA 921111881536977
  32. Stephanie DodgeEl Dorado Hills, CA 957621649936105
  33. Erin DohertyPalm Desert, CA 922111790141596
  34. Stephanie Dolan, COTA/LEncino, CA 914361285950824
  35. Samantha Domingues, COTA/LFountain Valley, CA 927081811242373
  36. Jennifer DominguezSalinas, CA 939061518562677
  37. Randi DominguezApple Valley, CA 923071235723149
  38. Taylor Donato, COTA/LTarzana, CA 913561578421533
  39. Bianca Donlucas, COTASouth Gate, CA 902801639818529
  40. Alissa DoolanStockton, CA 952071154872505
  41. Judith DoreMonterey, CA 939401720275191
  42. Cathy Dorn, COTA/LSan Diego, CA 921301245421619
  43. Janess Andrei Doroja, OTAThousand Oaks, CA 913601457075392
  44. Jon DorotheoAnaheim, CA 928051548193311
  45. Raquel Dos Santos, OTA/LSanta Ana, CA 927061770972424
  46. Payal Dosaj, COTAChino Hills, CA 917091396383972
  47. Edward Dougherty, COTAVista, CA 920811760650808
  48. Rose DowdClovis, CA 936111457749012
  49. Sherri Drehobl, COTA/LCarlsbad, CA 920091376207704
  50. Evelyn DrewSacramento, CA 958381255729414

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.