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 6 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. Andrea Castaneda, COTA/LGarden Grove, CA 928431457877896
  2. Margarita Castellanos, OTA/LWhittier, CA 906021861181505
  3. Abigail Castillo, COTA/LArcadia, CA 910061568174621
  4. Alonso Castrellon, COTAGarden Grove, CA 928411518488584
  5. Caroline Castro, COTALong Beach, CA 908021568701696
  6. Erika CastroPalm Desert, CA 922111669019063
  7. Hannah CastroSacramento, CA 958381982163119
  8. Megan CaudilloMonrovia, CA 910161376259192
  9. Rachel Cayot, COTASan Bruno, CA 940661609253723
  10. Kevin CecilDavis, CA 956161427586213
  11. Jesus Cejudo, COTA/LHawthorne, CA 902501740638600
  12. Xyril CelestinoColton, CA 923241568057867
  13. Karina CelisMontebello, CA 906401740988203
  14. Priscilla CelisNorwalk, CA 906501871270298
  15. Isabella Cello, COTASacramento, CA 958641902439854
  16. Michael CervantesDowney, CA 902411699617811
  17. Elizabeth CespedesCosta Mesa, CA 926261467303479
  18. Christopher ChaconAlhambra, CA 918031568009272
  19. Elizabeth ChaconSacramento, CA 958111588452064
  20. Melissa ChalongwongseCorona, CA 928791720609340
  21. Jonathan Chambers, COTA/LWoodland, CA 957761861887465
  22. Angela Chan, COTA/LPlacentia, CA 928701649779117
  23. Frankie ChanSacramento, CA 958221861880635
  24. Kristy ChanStockton, CA 952041922580216
  25. Stacie Chan, COTAGarden Grove, CA 928411043593965
  26. Brittany Chapin, COTA/LSacramento, CA 958171558820639
  27. Selene Chau, COTA/LSouth El Monte, CA 917331992596118
  28. Cindy ChavezHanford, CA 932301235903758
  29. Kin ChavezSan Leandro, CA 945781699389650
  30. Ysabel Chavez, COTA/LLa Habra, CA 906311306421904
  31. Leila Kiani Chea, OTA/LPVentura, CA 930031962321158
  32. Anne Chen, C.O.T.A.Cerritos, CA 907031265737712
  33. Thangputtevy Chhea, RBTSan Diego, CA 921081497221881
  34. Sou ChhuorSylmar, CA 913421437500527
  35. Tracey ChiemOntario, CA 917611770180119
  36. Katelyn ChilcoteSaratoga, CA 950701760900534
  37. Mia Chitty, COTA/LTorrance, CA 905031710838347
  38. Lana ChlekRescue, CA 956721982552048
  39. Helen ChoPasadena, CA 911061194498097
  40. Joyce ChoNorwalk, CA 906501245009844
  41. Sangho ChoTurlock, CA 953821063982403
  42. Sul Cho, COTALong Beach, CA 908071124647219
  43. Kathy ChungDowney, CA 902421598131229
  44. Richard Cich, COTAAnderson, CA 960071184310062
  45. Evelin CifuentesLos Angeles, CA 900571003385873
  46. Lisa CiottoRedondo Beach, CA 902771023556180
  47. Anna CirilosSan Leandro, CA 945781295292811
  48. Olivia ClarkFullerton, CA 928351083226419
  49. Patricia ClaxtonDavis, CA 956181841517935
  50. Alexis Marie CodillaMira Loma, CA 917521205386752

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.