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 21 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. Brenda Mancia-Leiva, COTA/LSherman Oaks, CA 914231598551731
  2. Kelly ManningRoseville, CA 956611275009722
  3. Monetta ManningEncino, CA 914361841651940
  4. Gay ManteyLaguna Hills, CA 926531003118407
  5. Khyle Rafael ManuelCamarillo, CA 930101528853777
  6. Jemma Manukyan, COTA/LOakland, CA 946111346709490
  7. Susanne Mapes, COTACypress, CA 906301912318189
  8. Jennifer MapoteRedondo Beach, CA 902781164163457
  9. Carlo Marcelo-SalcedoArcadia, CA 910071750053468
  10. Amanda Mardis, COTAPalm Desert, CA 922111760848626
  11. Angelina Margolis, COTABurlingame, CA 940101154134401
  12. Janice Margolis, COTALos Angeles, CA 900391245620657
  13. Nicole Mariscal, COTA/LBellflower, CA 907061700369592
  14. Alynn Maroney, COTA/LRescue, CA 956721629652052
  15. Alyssa MarquezTemecula, CA 925901548159635
  16. Julia Mars, COTA/LTemecula, CA 925901346832508
  17. Jazmonique MarshallHemet, CA 925441508359977
  18. Lesley Marshall, COTAReseda, CA 913351487525994
  19. Chelsea Marta, COTASanta Ana, CA 927041871481556
  20. Shari Martin, COTA/LSan Diego, CA 921031598399008
  21. Veronica Martin, COTASan Diego, CA 921391689512527
  22. Lori Martin-EvansClarksburg, CA 956121326633827
  23. Tricia MartinelliSan Diego, CA 921031134637770
  24. Brenda MartinezCerritos, CA 907031700245784
  25. Ivan MartinezLynwood, CA 902621306552351
  26. Kelly Martinez, COTA/C.Rocklin, CA 956771740458439
  27. Marsha MartinezPlacentia, CA 928701457520637
  28. Michael Jet MartinezEncino, CA 914361982060455
  29. Rench Mel Martinez, COTALong Beach, CA 908061841078102
  30. Rosaura MartinezPalmdale, CA 935511518708486
  31. Sandra Martinez, COTASacramento, CA 958191609432426
  32. Sara Martinez, COTA/LEl Cajon, CA 920201669007738
  33. Steven MartinezSacramento, CA 958231417291956
  34. Teresa MartinezBurbank, CA 915061477274975
  35. Tiffany Martinez, COTABrea, CA 928211487223343
  36. Anita MascariniaLos Angeles, CA 900261760792063
  37. Donna Mass, C.O.T.A.Barstow, CA 923111497950984
  38. Mahin MassihVan Nuys, CA 914051851789671
  39. Sylvia Masters, COTARedlands, CA 923741417391624
  40. Maryann MateszCathedral City, CA 922341699475764
  41. Jeffrey MathewsOakland, CA 946091518355130
  42. Catherine Matsuura, COTACVacaville, CA 956881689880486
  43. Lisa Matthews, COTA/LSacramento, CA 958641639838451
  44. Emily MauldinLos Angeles, CA 900351306687892
  45. Herrick MayangSan Diego, CA 921011720741457
  46. Karen Mayberry CourtneyChatsworth, CA 913111073297313
  47. Alexander Mayer, COTACarmichael, CA 956081891666848
  48. Michael MayoAnaheim, CA 928081619539293
  49. Maria Mazariego, COTAFremont, CA 945361861960544
  50. Thubelihle Mbatha, COTASan Jacinto, CA 925831336877752

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.