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 28 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. Marlene RamirezSacramento, CA 958151407709611
  2. Melissa RamirezFontana, CA 923351538346283
  3. Sheila RamirezDuarte, CA 910101598292286
  4. Noe Ramirez LopezDixon, CA 956201578170619
  5. Rommel RamonesBrentwood, CA 945131467822619
  6. Macelda RamosGlendora, CA 917411821252586
  7. Socorro RamosRiverside, CA 925061871315127
  8. Darla Randolph, COTACarmichael, CA 956081952968604
  9. Revathy RanganathanGlendora, CA 917401760021315
  10. Summer Rapazzo, COTA/LPalm Desert, CA 922111366927592
  11. Jenifer RapkinPalm Desert, CA 922111235827650
  12. Aimee Rasch, COTAClovis, CA 936111346612215
  13. Christine Rasmussen, COTA/LWhittier, CA 906061790553436
  14. Annay RatcliffSan Bernardino, CA 924081326929787
  15. Staci Raygoza, COTAFountain Valley, CA 927081043431950
  16. Colleen Reape, COTAChico, CA 959261972924389
  17. Savannah RecksiekRiverside, CA 925061578252607
  18. Samantha RedmanLos Angeles, CA 900021477942902
  19. Stacey Redmond, COTASan Diego, CA 921301518206275
  20. Leinalyn Reduque, COTASan Francisco, CA 941091720867732
  21. Jennie ReedMonrovia, CA 910161750160966
  22. Desiree ReederGlendora, CA 917401174287924
  23. Cameron Rees, COTA(L)Pala, CA 920591114561560
  24. Emily Regan, COTA/LWest Covina, CA 917901255153482
  25. Jenny Regan, COTA/LGarden Grove, CA 928411821435926
  26. Matthew Regan, COTAWest Hollywood, CA 900461871981274
  27. Erika Danielle Regnier, COTARedondo Beach, CA 902781457190522
  28. Michelle Rehn, COTAReseda, CA 913351790561306
  29. Tatjana ReiWillows, CA 959881891328357
  30. Norvetta Reid, COTAVisalia, CA 932771669673471
  31. Walter Reid, THERAPISTVisalia, CA 932771275734089
  32. Michael Reilly, COTAParadise, CA 959691700017548
  33. Kelly Reilly Gardner, COTA/LLong Beach, CA 908141922333624
  34. April Reitz, COTAMerced, CA 953401952007742
  35. James Respicio, COTA/LCarmichael, CA 956081801554530
  36. Anna Reyes, OTARocklin, CA 956771164059606
  37. Erlinda Reyes, COTAVan Nuys, CA 914051942698758
  38. Miriam ReyesWalnut, CA 917891548730658
  39. Maria Reyes Araiza, COTA/LRancho Cucamonga, CA 917301851271647
  40. Rachel Reynoso, COTAChula Vista, CA 919101982417127
  41. Jane RheeGarden Grove, CA 928411265930929
  42. Lillian Ricchuito, COTA/LSacramento, CA 958641093331183
  43. Jay RichardsSalinas, CA 939011598928772
  44. Julie Richards, COTA/LSalinas, CA 939061194321638
  45. Kimberly RichardsMoreno Valley, CA 925551780448787
  46. Amy Richardson, COTA/LWoodland Hills, CA 913671588909675
  47. Kristen RichardsonYorba Linda, CA 928861942804497
  48. Angelina Rico, BS, COTA/LApple Valley, CA 923071972264745
  49. Matt RiggsSan Diego, CA 921071861318941
  50. Janna Riis-VestergaardOjai, CA 930231265297949

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.