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 29 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. Sophie Riley, COTAVan Nuys, CA 914051174084065
  2. Pierre Angeli Rinker, COTA/LLadera Ranch, CA 926941881407286
  3. Diana Rios, COTA/LGreenbrae, CA 949041386202844
  4. Lisa Rios, COTA/LModesto, CA 953501699237958
  5. Patricia Risi, COTA/LSan Diego, CA 921031881532836
  6. Crystal Rivas, COTA/LApple Valley, CA 923071740970391
  7. Fabiola RivasAlhambra, CA 918031093542920
  8. Francisco Rivera, OTANorco, CA 928601447022017
  9. Debra RobinsonWest Covina, CA 917921982062584
  10. Melody RobinsonMurrieta, CA 925621124890678
  11. Patricia Rochon, A.S.Rancho Mirage, CA 922701740439447
  12. Danika Joy Roda, COTAGarden Grove, CA 928431144032913
  13. Katie Rodgers, COTAVacaville, CA 956871497292163
  14. Sheena Rodrigo, COTA-LEscondido, CA 920251154710598
  15. Aaron Rodriguez, COTAMontclair, CA 917631164267886
  16. Emily RodriguezPlacentia, CA 928701093222507
  17. Kenzie RodriguezSacramento, CA 958241538848460
  18. Maricela RodriguezSan Francisco, CA 941171295972974
  19. Nicholas RodriguezSanta Clara, CA 950541508480195
  20. Oscar RodriguezSun Valley, CA 913521912371469
  21. Vicki RodriguezSan Bernardino, CA 924081255282950
  22. Gabriel Rodriguez GarciaPacoima, CA 913311790650497
  23. Cynthia Rogers, COTA/LPleasanton, CA 945881982179552
  24. Lindsey Rogers, COTASanta Barbara, CA 931111578136594
  25. Glynis RojasOrange, CA 928681043979644
  26. Itziany RojasCamarillo, CA 930101174494926
  27. Jessica Rojas Ramirez, COTALivermore, CA 945501962158485
  28. Chad RomanSan Diego, CA 921021720522717
  29. Michael Roman, COTAPoway, CA 920641982942959
  30. Paul RomayorSan Diego, CA 921111437370442
  31. John Romero, COTA/LMerced, CA 953401295200905
  32. Krystal RomeroGarden Grove, CA 928431972430106
  33. Zaida Romero, COTA/LThousand Oaks, CA 913601083202097
  34. Isabel Rosales, COTA/LSan Clemente, CA 926731962736124
  35. Gerardo RosasRiverside, CA 925011316356876
  36. Martha RosinskyVista, CA 920831770029878
  37. Jennifer Ross, COTA/LSanta Monica, CA 904041841720232
  38. Aitikah Rossett, OTACorona, CA 928791932789138
  39. Stephanie Roths, COTA/LEscondido, CA 920251104171800
  40. Natalie Rowan, COTA/LSan Diego, CA 921071265938211
  41. Jamie RowlandLong Beach, CA 908021285076125
  42. Rosemary Rualo, COTALong Beach, CA 908061235527755
  43. Dominick Rucireta, COTAFullerton, CA 928351609264605
  44. Irina Rudometkina, COTA/LRescue, CA 956721881286730
  45. Katherine RuedasAnaheim, CA 928051790452753
  46. Brenda Ruiz, SLPHuntington Beach, CA 926471366080251
  47. Carina Ruiz, COTAPalm Desert, CA 922111114653615
  48. Cynthia Ruiz, COTASan Diego, CA 921111275289688
  49. Danielle RuizFountain Valley, CA 927081932071065
  50. Robert Ruppert, COTA/LSan Fransico, CA 941121306535281

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.