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 14 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. Cindy Gutierrez, COTA/LWest Covina, CA 917901457085003
  2. Janet Gutierrez, COTA/LWalnut, CA 917891801658307
  3. Mayra Gutierrez, A.APico Rivera, CA 906601962721647
  4. Rick Gutierrez, COTA/LLos Alamitos, CA 907201629588611
  5. Sarah GuyUnion City, CA 945871366087009
  6. Irvin Guzman, COTA/LLake Forest, CA 926301619782398
  7. Karen Guzman, COTAPalmdale, CA 935511548989916
  8. Sophia Guzman, COTARedlands, CA 923741982474557
  9. Veronica GuzmanFontana, CA 923351083300354
  10. Brian HaCosta Mesa, CA 926261003371295
  11. Tung Ha, COTAEncinitas, CA 920241922873082
  12. Ana HaaCalabasas, CA 913021265309769
  13. Annelise Haile, COTA/LDixon, CA 956201619457645
  14. Beth HainesSan Diego, CA 921091598207045
  15. Eric HalavanjaLos Angeles, CA 900681366927709
  16. Jennifer Halcrow, COTAPalm Desert, CA 922111306202239
  17. Michelle Hale, COTA/LSanta Clarita, CA 913551639953649
  18. Cassandra Hall, COTAEl Dorado Hills, CA 957621215631072
  19. Christen Hall, COTALivermore, CA 945511255549333
  20. Tiffany Hall, COTA/LPlacerville, CA 956671982150041
  21. Catherine Halmi, COTAEncino, CA 914361851866743
  22. Daniel HamiltonWest Covina, CA 917901023405941
  23. Eric Hamilton, COTASan Leandro, CA 945781790506293
  24. Sean HamiltonLos Angeles, CA 900261790315224
  25. Ashlin Hammond, COTASan Marcos, CA 920691104758689
  26. Bobbi Hanna, COTA/LSan Diego, CA 921061720351075
  27. Ream HannaAliso Viejo, CA 926561598270977
  28. Maria Hannegan, COTASan Ysidro, CA 921731588363683
  29. Kimberly Hanson, COTA/LSan Ramon, CA 945831346585684
  30. Macy Hanson, COTA/LSan Diego, CA 921081538555966
  31. Hayley Hargrove, COTA/LTemecula, CA 925911972843423
  32. Jeffrey HarmStockton, CA 952091598466013
  33. Rebekah Harman, COTA/LWhittier, CA 906021730322777
  34. Denise Harmon, COTALodi, CA 952421497411557
  35. Amanda Harnen, COTA/LArcadia, CA 910061962109249
  36. Lauren HarnessAliso Viejo, CA 926561528464443
  37. Kayla HarrSan Clemente, CA 926731891258448
  38. Marylou HarringtonSan Diego, CA 921021194133173
  39. Donald HarrisVictorville, CA 923951154460442
  40. Julianna Harris, OTA/LSanta Cruz, CA 950621962662973
  41. Lisa Harris, COTAGlendale, CA 912051881083822
  42. Dawn HarrisonSan Diego, CA 921031396684551
  43. Felicia Hartman, COTATemecula, CA 925901316687403
  44. Emily HashMountain View, CA 940401366909632
  45. Shawdon HashemiVista, CA 920811740028760
  46. Christopher HasselSanta Barbara, CA 931111356188346
  47. Shelley HatfieldSan Diego, CA 921021265800155
  48. Arlene HauserSan Bruno, CA 940661780857706
  49. Kathryn HayesSanta Cruz, CA 950621013616937
  50. Karen HayrapetyanVan Nuys, CA 914051194214130

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.