NPPES file of Aug 9, 2026

Behavior Analyst in California

20,348 NPPES records list behavior analyst with a practice address in California, 52 per 100,000 residents, the 5th highest rate of 51. Costa Mesa and San Diego have the most; each record links to the provider's NPI and the California license search. Page 225 of 407.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 103K00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Costa Mesa has the most, 1,239

  1. Costa Mesa1,239
  2. San Diego1,157
  3. Sacramento597
  4. Los Angeles534
  5. Woodland Hills509

Behavior Analyst records in California

  1. Ruben MarquezPismo Beach, CA 934491316490725
  2. Samantha MarquezCosta Mesa, CA 926261215734819
  3. Sheccid MarquezCovina, CA 917241649040098
  4. Soralla MarquezPoway, CA 920641790388908
  5. Tiffany Marquez, BCBAIrvine, CA 926061326635103
  6. Tracy Marquez, B.A.Ontario, CA 917641093510950
  7. Vanessa Marquez, MA, BCBAModesto, CA 953501780154344
  8. Wynnette Marquez, BCBAHuntington Beach, CA 926491346591195
  9. Laisa Marquez CastellanosCosta Mesa, CA 926261376361154
  10. Michelle Marquez GallardoWoodland Hills, CA 913641700437282
  11. Jacqueline Marquez MaldonadoWoodland Hills, CA 913671306205828
  12. Juan Marquez-LuaFremont, CA 945381134797087
  13. Brooke MarraPalmdale, CA 935521962870725
  14. Brian Marrier, BCABClearlake, CA 954221144757261
  15. Karly Marriott, MA, BCBASan Diego, CA 921111437456555
  16. Tristan Marriott, M.A, BCBARed Bluff, CA 960801235372780
  17. Ruby MarronCamarillo, CA 930121194176156
  18. Janisse Marron-HernandezSan Diego, CA 921211356849194
  19. Olivia MarroneEl Cajon, CA 920201508412545
  20. Darence MarrowCosta Mesa, CA 926261215704804
  21. Mariah MarrufoIrvine, CA 926141336916428
  22. Hannah Marsden, BCBAEncinitas, CA 920241861861353
  23. Ariana MarshTracy, CA 953771306333877
  24. Sydney MarshWoodland Hills, CA 913671780254839
  25. Kathryn Marshack, BCBAHuntington Beach, CA 926481891194940
  26. Jason Marshall, BCBAFresno, CA 937271376890368
  27. Jasznia MarshallCosta Mesa, CA 926261558061010
  28. Justine MarshallSan Diego, CA 921081306325485
  29. Kalene MarshallBakersfield, CA 933091023554524
  30. Kayla MarshallConcord, CA 945201740030964
  31. Leslie MarshallGrover Beach, CA 934331811474232
  32. Makia MarshallNorthridge, CA 913251285554147
  33. Marissa Marshall, BCBAIrvine, CA 926121265825293
  34. Melanie Marshall, BCBACulver City, CA 902301811537731
  35. Niela MarshallPalmdale, CA 935511568257558
  36. Samantha MarshallYucaipa, CA 923991003625971
  37. Shaniya MarshallMoreno Valley, CA 925511073481776
  38. Virginia Marshall, BA PSYCHOLOGYVictorville, CA 923921174049829
  39. Grace MarsopianArcadia, CA 910061780186056
  40. Lyndi MartensOakland, CA 946061073002135
  41. Lexus MarthelWilliams, CA 959871912470352
  42. Alexander MartinDublin, CA 945681215823281
  43. Amanda MartinCarlsbad, CA 920081326540543
  44. Ashley MartinSan Jose, CA 951201669949210
  45. Carmen MartinWalnut Creek, CA 945981619242344
  46. Catherine MartinSan Diego, CA 921281578065371
  47. Christine MartinOceanside, CA 920581740798594
  48. Davon MartinCosta Mesa, CA 926261265240899
  49. Francesca MartinVacaville, CA 956871518511260
  50. Grace MartinCosta Mesa, CA 926261629895875

Source: CMS NPPES, primary taxonomy 103K00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 5 of 51 per resident

  1. Massachusetts67
  2. Hawaii63
  3. Florida60
  4. California52
  5. New Mexico47
  6. Oklahoma44
  7. 50 states and D.C.32

Source: CMS NPPES, primary taxonomy 103K00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

under 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. California0.0%
  2. United States0.1%

Behavior Analyst records in California, measured

  • In a Medicare file5 of 20,348 · under 0.1% here, 0.1% nationally
  • In the CMS Doctors and Clinicians file14 · 0.1% here, 0.1% nationally
  • Not updated in five years or more10,235 · 50.3% here, 47.0% nationally
  • Median graduation year2017 · the 14 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 103K00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

20,348 NPPES records list behavior analyst (103K00000X) as their primary taxonomy with a practice address in California: 52 per 100,000 residents against 32 nationally (50 states and D.C.). Costa Mesa has 1,239 of them (6%).

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. Florida13,565
  2. Texas5,837
  3. New York5,183
  4. Massachusetts4,718

States with a similar rate per 100,000

  1. New Mexico47.5
  2. Oklahoma44.0
  3. New Hampshire41.8
  4. Hawaii63.5

The largest states

  1. Florida13,565
  2. Texas5,837
  3. New York5,183
  4. Massachusetts4,718
  5. Nevada4,540

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.