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 55 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. Sofia Diaz, PHD.Glendale, CA 912031104959279
  2. Tanya DiazWhittier, CA 906021154639169
  3. Maria Diaz Rekuc, PSY.D.San Diego, CA 921791336551068
  4. Angelita Diaz-Akahori, PSY.D.Los Angeles, CA 900221215024070
  5. Laura Diaz-Winterset, PSYCHOLOGISTLong Beach, CA 908101346372273
  6. Sabrina Dibiagio, PSY.D.Los Angeles, CA 900651033459177
  7. Taylor DichsenRedwood City, CA 940611013774728
  8. David Dicicco, PHDSan Diego, CA 921221669467015
  9. F Dicicco, PHDSan Diego, CA 921221003801457
  10. Melinda Diciro, PSY.D.Represa, CA 956711043489800
  11. Cordula Dick-Muehlke, PHDOrange, CA 928681306282603
  12. Janarol Dickens, PHD., J.DWoodland Hills, CA 913671194531046
  13. Leah Dickenson, PH.D.Westlake Village, CA 913611740429547
  14. Dean Dickerson, PH.D.Davis, CA 956161932432994
  15. Agnes Dickson, PSYCHOLOGISTSanta Ana, CA 927051861565772
  16. Gregory Dickson, PH.D.La Jolla, CA 920371225361603
  17. Kimberly Dickson, PSYDOakdale, CA 953611285119768
  18. Shannon Dickson, PSY.D.Sacramento, CA 958181639311293
  19. Whitney Dicterow, PSY.D.Los Angeles, CA 900491710147715
  20. Alexandra Diddams, PH.DSan Carlos, CA 940701295325652
  21. Lisa Dieckmann, PHDNorwalk, CA 906501902994916
  22. Caroline Diehl, PHDLos Angeles, CA 900251033768890
  23. Huong Diep, PSY.D., ABPPSan Marcos, CA 920691871735266
  24. Deborah Diferdinando, PSY.D., MFT, CADCIICarlsbad, CA 920081609978931
  25. Staci Digioia, PSY.D.Antioch, CA 945311558709600
  26. Rhonda Digiovanni, PSYD, LMFTLancaster, CA 935341831344720
  27. Ziya Dikman, PH.D.Greenbrae, CA 949041376699793
  28. Lauren Dill, PH.D.Long Beach, CA 908221851641344
  29. Julie Diller, PSYDLos Angeles, CA 900341023249307
  30. Susanne Dillmann, PSY.D.Escondido, CA 920251487728598
  31. Sheri Dillon, PSY.D.Santa Rosa, CA 954041528105822
  32. Dominic Dimaggio, PSY.D.San Diego, CA 921021710416334
  33. Juanita Dimas, PH.D.Oakland, CA 946111316107774
  34. Andreas Dimeo, PHDLa Puente, CA 917461750587440
  35. Julie Dimmitt, PH.D.Los Gatos, CA 950321548545999
  36. Anthony Dinardo, PSY.D.Los Angeles, CA 900461962699413
  37. Ralph Diner, PH.D, M.S.C.P.Encino, CA 913161801988431
  38. Alann Dingle, PH.D.Hermosa Beach, CA 902541881772390
  39. Lori Dinwiddie, PSY.D.Oxnard, CA 930361083926257
  40. Catherine Dionisio, PH.D.Walnut Creek, CA 945961730365248
  41. Christina Diorio, PSYDPalo Alto, CA 943061649086877
  42. Michael Dipaolo, PH.D.Los Angeles, CA 900251053534487
  43. Dawn Diraimondo, PSY.D.Sacramento, CA 958251841596335
  44. Mindy Dirks, PH.D.Palo Alto, CA 943011255941753
  45. Susan Diskin, PHDLos Angeles, CA 900671891845905
  46. Todd Disney, PSYDSanta Rosa, CA 954031942353628
  47. Charlotte Distefano, PHDLos Angeles, CA 900951679096101
  48. Kerianne Ditomasso, PSY.D.San Luis Obispo, CA 934011689291007
  49. Kirk Ditterich, PSYDTruckee, CA 961611720301955
  50. Kimberly Dittu, PSYD, LCSWLos Angeles, CA 900341588894620

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.