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 144 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. Tracy Mason, PSY.D.Fountain Valley, CA 927081811947310
  2. Bonnie Mass, PH.D.Santa Monica, CA 904011538474895
  3. Roxie Massey, PH.D.Folsom, CA 956301851417166
  4. Stephanie Massey, PSY.D.San Diego, CA 921301891355996
  5. Jeni Massi, PSY.D.Palmdale, CA 935501396864377
  6. Tiffany Massia, PSYDClaremont, CA 917111487172920
  7. Ashley Massimino, PSY.D.Anaheim, CA 928011619161569
  8. John Massimino, M.D.Laguna Niguel, CA 926771720282239
  9. Martha Masson, PHDRancho Cucamonga, CA 917011952417289
  10. Natalie Masson, PHDLa Jolla, CA 920371306005566
  11. Colleen Masters, PHDDana Point, CA 926291215067558
  12. Erica Robyn MastersCitrus Heights, CA 956101700746500
  13. Noelle Angelique Mastrili, PHDFremont, CA 945381598626954
  14. Glenn Masuda, PH.D.Rosemead, CA 917701720115256
  15. Patricia Masuda-Story, PSY.D.Glendale, CA 912031467490987
  16. Jose MatadamaLos Angeles, CA 900591487172631
  17. Dana Matalon, PSYDSacramento, CA 958191154445302
  18. Cynthia Mataraso, PSYCHOLOGISTConcord, CA 945191063696409
  19. Teresa Matazzoni, PSYDUnion City, CA 945871093006306
  20. Adelina Matevosyan, PHDGlendale, CA 912031720347636
  21. Yelena Matevosyan, PSYDSun Valley, CA 913521386205995
  22. David Mather, PH.D.San Diego, CA 921341194795617
  23. Deborah Mather, PH.D.Long Beach, CA 908031669429767
  24. Brittany Matheson, PHDPalo Alto, CA 943041700306958
  25. Marie Matheson, PHDMalibu, CA 902651467400762
  26. Jennie Mathess, PSY.D.Los Angeles, CA 900421003035304
  27. Alexandra Mathews, PSYDCanoga Park, CA 913031700043122
  28. Suzanne Mathews, PH.D.La Jolla, CA 920371780820415
  29. Christine Mathiesen, PSYDAtascadero, CA 934231578515730
  30. Alberto Matias, PHDAntioch, CA 945091477601086
  31. Tamara Matic, PH.D.Los Angeles, CA 900271497870737
  32. Carole Matlen, PH.D.Tehachapi, CA 935611295806826
  33. Robyn Matlon, M.ED, M.A., PSY.D.Berkeley, CA 947041780901280
  34. Afsaneh Matloob, PSY.D.Los Angeles, CA 900241558486118
  35. Melissa Matos, PH.DLos Angeles, CA 900641992283188
  36. Beverly Matsuishi, PH.D.San Rafael, CA 949011578598447
  37. Gregory Matsumoto, PSY.D.Napa, CA 945591295753341
  38. Kristin Matteson, PHDCarlsbad, CA 920081083697304
  39. Carol Matthews, PSY.D.Sun City, CA 925861770773236
  40. Carol MatthewsWasco, CA 932801497884464
  41. Jerry Matthews, PH.D.San Diego, CA 921011730397910
  42. Judy Matthews, PH.DEl Cajon, CA 920211134248461
  43. Selina Matthews, PHDLos Angeles, CA 900251346502168
  44. Brigitte Matthies, PHDTarzana, CA 913561265671291
  45. Colin Mattingly, PSYDSanta Barbara, CA 931011225845977
  46. Lyssabeth Mattoon, PH.D.Merced, CA 953401366632747
  47. Laurel Mattos, PH.D.Patton, CA 923691720674633
  48. Joe Mattox, PH.D.Oakland, CA 946121336295237
  49. Margaret Matty, PSY.D.Patton, CA 923691174768113
  50. William Matulich, PH.D.San Diego, CA 921191891935508

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.