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 20 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. Lucila Lopez, COTA/LMontebello, CA 906401376177683
  2. Marisol LopezHawthorne, CA 902501851789283
  3. Nellie Lopez, COTATemecula, CA 925901295452035
  4. Sandy Lopez, COTA/LBakersfield, CA 933041588548606
  5. Sarah Lopez, COTASanta Ana, CA 927051942169859
  6. Robin Loranger, COTA/LWestminster, CA 926831053192922
  7. Jamie Lord-Tovar, COTAAlhambra, CA 918031245899848
  8. Megan Loughlin, COTARancho Santa Margarita, CA 926881902515620
  9. Jamin LoveEastvale, CA 917521669861779
  10. Ashley LoweLafayette, CA 945491568052546
  11. Erica Lowis, COTA/LSacramento, CA 958171477959021
  12. Irene Lozano, COTAStanton, CA 906801447025002
  13. Angel LozoyaApple Valley, CA 923071245066372
  14. Andrea LuaRiverside, CA 925051053088229
  15. Debra Lubke, COTA/LSan Diego, CA 921031124945050
  16. Christine Lucas, COTA/LLos Angeles, CA 900271831449834
  17. Lisa Lucero-Krier, COTA/LSan Diego, CA 921231861940579
  18. Bianca Jean LugtuCarson, CA 907451902389059
  19. Jariquo Lumarque, COTA/LGarden Grove, CA 928441184264772
  20. Yvette Luna, OTA, RNCerritos, CA 907031306116991
  21. Derjen LuoPomona, CA 917661124485636
  22. Longkim LuongAnaheim, CA 928011437526928
  23. Arleena Lupercio, COTAGarden Grove, CA 928411437462215
  24. Heather Luppino, OTASanta Ana, CA 927011053256172
  25. Christy LynchSan Diego, CA 921031437530870
  26. Candice Ma, COTA/LLa Verne, CA 917501376212688
  27. Mariah Ma'Ae, COTA/LCypress, CA 907201407534613
  28. Maria Maatouk, COTAAnaheim, CA 928051255010336
  29. Shawn Mac, COTA/LArcadia, CA 910071215634936
  30. Erika Macias, COTA/LSantee, CA 920711023897675
  31. Valen MackRiverside, CA 925061235971219
  32. Megan Mackey, C.O.T.A./LFullerton, CA 928321376836304
  33. Jorie Madderra, NHA, OTA/LSan Diego, CA 921221427769611
  34. Michael Madlem, COTA, LVNApple Valley, CA 923081700729324
  35. Sirenia Madrigal, COTASan Diego, CA 921311346535424
  36. Nayelie MaganaGardena, CA 902481306763818
  37. Rosie Magdaleno, COTAElk Grove, CA 956241700219524
  38. Tammi Magie, COTABeaumont, CA 922231689030587
  39. Barbara MagnattaEureka, CA 955031538557327
  40. Michael MahLos Angeles, CA 900191598611444
  41. Shayna MahoneyGlendale, CA 912051295430668
  42. Michael Maines, COTA/LOntario, CA 917611306531264
  43. Karianne Majer, COTA/LRiverside, CA 925061043889579
  44. Jeorge MakinoseLancaster, CA 935341033825237
  45. Natalya MakoyedOrangevale, CA 956621629843313
  46. Joel Mallari, COTAHuntington Beach, CA 926471457213787
  47. Christa Malsbury, COTA/LTorrance, CA 905031114517067
  48. Cinyand Man Li, COTA/LSouth El Monte, CA 917331962071613
  49. Ariane Tyra ManalastasLos Angeles, CA 900051114551439
  50. Xyvez Wency Manalastas, COTA/LLos Angeles, CA 900341609763390

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.