NPPES file of Aug 9, 2026

Clinical Psychologist in California

12,647 NPPES records list clinical psychologist with a practice address in California, 32 per 100,000 residents, the 7th highest rate of 51. Los Angeles and San Diego have the most; each record links to the provider's NPI and the California license search. Page 168 of 253.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 103TC0700X · method

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

Los Angeles has the most, 1,268

  1. Los Angeles1,268
  2. San Diego983
  3. San Francisco802
  4. Oakland354
  5. Pasadena293

Clinical Psychologist records in California

  1. Kate Ohene-Gambill, PSYDStanford, CA 943051720458011
  2. Masami Ohnui, PSYDGuerneville, CA 954461255643037
  3. Rita Ohriner, PH.D.Carlsbad, CA 920091316047251
  4. Asamau Ojarigi, PSYDAgoura Hills, CA 913011093900938
  5. Jan Okabe, PSYDCulver City, CA 902301508199605
  6. Cherie Okada, PSY.DLos Angeles, CA 900041568955474
  7. Rumiko Okada, PH.D.Santa Ana, CA 927011295862092
  8. Annika Okamoto, PH.D.San Francisco, CA 941181285182485
  9. Nancy Oke, PH.D.La Jolla, CA 920371437173226
  10. Carolyn Okeefe, PSY.D.Long Beach, CA 908021821983818
  11. Ari OklanBerkeley, CA 947031962759449
  12. Theresia Oklan, PHDSan Francisco, CA 941151376911123
  13. Anna Okonek, PH.D.Los Angeles, CA 900731881638963
  14. Ebele Okonkwo-Anwasi, PH.DCarlsbad, CA 920081043978786
  15. Nancy Olesen, PH.D.San Rafael, CA 949011598844425
  16. Terrence Oleson, PH.D.Los Angeles, CA 900481427263912
  17. Petra Olesovsky, PH.D.La Quinta, CA 922531013938166
  18. Jason Olin, PHDNewport Beach, CA 926601548853633
  19. Devin Olio, MASTER PSYCHOGOLYChico, CA 959261245637263
  20. Anne Oliphant, PSY.D.Torrance, CA 905051134348907
  21. Audrey Oliva, PH. D.Santa Monica, CA 904031235852351
  22. Kim Oliva, PSY.D.Westlake Village, CA 913621942382973
  23. Michael OlivaresLos Angeles, CA 900481972233229
  24. Rafael Olivares ChayebSan Diego, CA 921791003317306
  25. Deanna Olivas, PSYDCulver City, CA 902321073632378
  26. Melinda Olivas, PSY.DSanta Fe Springs, CA 906701871636860
  27. Rebecca Oliver Roman, PHDIrvine, CA 926121447914544
  28. Elizabeth Ollen, PHDLos Angeles, CA 900251508346883
  29. Nicole Olley, PH.D.Vacaville, CA 956871114163474
  30. Christine Olney, PSY.D.Calabasas, CA 913021538412085
  31. Thomas Olona, PH.D.Glendale, CA 912031164516886
  32. Akira Olsen, PSY.D.Burlingame, CA 940101093910184
  33. Eric Olsen, PH.D.Los Gatos, CA 950321013033174
  34. Kenneth Olsen, PSY.D.Avenal, CA 932041396097911
  35. Sallie Olsen, PH.DLivermore, CA 945501881621845
  36. Trinnin Olsen, PSYDCorona, CA 928791811363138
  37. Barry Olson, PH.DModesto, CA 953551639261134
  38. Katherine Olson, PH.D.Santa Barbara, CA 931101285884999
  39. Kathryn Olson, PSYDSan Diego, CA 921211235419029
  40. Kimberly Olson, PH.D.Barstow, CA 923111306906755
  41. Lacy Olson, PHDLos Angeles, CA 900481699222083
  42. Nancy Olson, L.C.S.W.Chico, CA 959731922293091
  43. Nichole Olson, PHDStanford, CA 943051568838050
  44. Trevor Olson, PSY.D.La Jolla, CA 920371972956373
  45. Genevieve Olucha, PH.D.Encinitas, CA 920241891024964
  46. Osazuwa Omede, PSY.D.,PH.D.,MSAOMLos Angeles, CA 900051134219181
  47. Zheila Ommani, PSY.D.Claremont, CA 917111265867402
  48. Long On, PSY.D.Walnut Creek, CA 945971053627117
  49. Michael Ondrusek, PH.D.La Jolla, CA 920371972659761
  50. Dale Oneal, PH.DLaguna Beach, CA 926511215138391

Source: CMS NPPES, primary taxonomy 103TC0700X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 7 of 51 per resident

  1. Massachusetts45
  2. Hawaii45
  3. New York34
  4. California32
  5. Illinois31
  6. Connecticut31
  7. 50 states and D.C.20

Source: CMS NPPES, primary taxonomy 103TC0700X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

8.7% of these records appear in a Medicare file, against 12.2% 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. California8.7%
  2. United States12.2%

Clinical Psychologist records in California, measured

  • In a Medicare file1,104 of 12,647 · 8.7% here, 12.2% nationally
  • In the CMS Doctors and Clinicians file2,425 · 19.2% here, 22.4% nationally
  • Not updated in five years or more8,008 · 63.3% here, 65.3% nationally
  • Median graduation year2006 · the 2,424 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 103TC0700X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

12,647 NPPES records list clinical psychologist (103TC0700X) as their primary taxonomy with a practice address in California: 32 per 100,000 residents against 20 nationally (50 states and D.C.). Los Angeles has 1,268 of them (10%).

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. New York6,558
  2. Illinois3,947
  3. Massachusetts3,185
  4. Florida2,980

States with a similar rate per 100,000

  1. Connecticut30.8
  2. Michigan29.5
  3. Colorado28.1
  4. Oregon27.0

The largest states

  1. New York6,558
  2. Illinois3,947
  3. Massachusetts3,185
  4. Florida2,980
  5. Michigan2,965

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.