NPPES file of Aug 9, 2026

Psychologist in California

7,304 NPPES records list psychologist with a practice address in California, 19 per 100,000 residents, the 13th highest rate of 51. Los Angeles and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 112 of 147.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 103T00000X · 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, 671

  1. Los Angeles671
  2. San Francisco516
  3. San Diego431
  4. Oakland257
  5. Sacramento165

Psychologist records in California

  1. Roxanna Rosen, PSY.DPasadena, CA 911061588323133
  2. Kashia Rosenau, PHDSanta Monica, CA 904041174388276
  3. Adrienne RosenbergOakland, CA 946011477002004
  4. Audrey Rosenberg, PHDOakland, CA 946011952456386
  5. Benjamin RosenbergLos Angeles, CA 900661134983703
  6. Amy Rosenblatt, PSY.D.Northridge, CA 913301730558552
  7. David Rosenblatt, PSY.D.Sacramento, CA 958191972867984
  8. Erin Rosenblatt, PSYDOakland, CA 946011598801474
  9. Gary RosenblattBolinas, CA 949241548328842
  10. Nancy Rosenbledt, PSY.D.Burlingame, CA 940101265612410
  11. Richard Rosenblum, PH.D.San Francisco, CA 941031306900246
  12. Erica Rosenfeld, PH.D.Claremont, CA 917111952468613
  13. Rachel RosenfeldPinole, CA 945641932380235
  14. Serina Rosenkjar, PH.D.Van Nuys, CA 914011285827550
  15. Ilene RosensteinLos Angeles, CA 900171679339105
  16. Amber RosenstockLos Angeles, CA 900491609015098
  17. Judith Rosenstock, PH.D.Los Angeles, CA 900481154477347
  18. Joel Rosenthal, PH.D.Palo Alto, CA 943011104861996
  19. Christopher Rosik, PH.D.Fresno, CA 937111801810205
  20. Olga Rosito, PHDSan Bruno, CA 940661992071237
  21. Joanna Rosoff, PSY.D.Bel Air, CA 900771386774131
  22. Bridgett Ross, PSY.D.San Diego, CA 921111508010661
  23. Christopher Ross, PH.D.Los Angeles, CA 900051174708895
  24. Karen Ross, MSW IN CALIF LCSWGarden Grove, CA 928401003914052
  25. Keri Ross, PSY.D.Santa Clarita, CA 913211275604464
  26. Leslie Ross, PSY.D.Los Angeles, CA 900051659498160
  27. Martin Ross, PH.D.Los Angeles, CA 900101477610491
  28. Nicholas Ross, PH.D.Capitola, CA 950101902215585
  29. Richard RossLos Angeles, CA 900951508968801
  30. Steven Ross, PH.D.San Ramon, CA 945831417014549
  31. Mark Rossdanson, PH.D.Los Angeles, CA 900481174545073
  32. Kayla RossellRedwood City, CA 940631760962492
  33. Kathryn Rossi, PSYCHOLOGISTLos Osos, CA 934021225996184
  34. Elise Rossiter, PH.D.Palo Alto, CA 943011164759627
  35. Holly Roth, PH.D.Truckee, CA 961611760552178
  36. William Roth, PHDLoma Linda, CA 923541154346849
  37. Monroe RothschildSherman Oaks, CA 914231750200721
  38. Steven Rothstein, PHDVentura, CA 930031407954597
  39. Jamie Rotnofsky, PHDSanta Barbara, CA 931011467613166
  40. Azita RouhparvarLos Angeles, CA 900241396260626
  41. Ellen Roumasset, PH.D.Daly City, CA 940151710053582
  42. Jennifer Rousch, PSYDLong Beach, CA 908151366749699
  43. Jared Roush, PH.D.Los Angeles, CA 900731730723370
  44. David Rouslin, PH.D.Lafayette, CA 945491235152000
  45. Nanette Rowe, PH.D.Redwood City, CA 940631841322138
  46. Maggy Rowell, PSYCHOLOGISTSacramento, CA 958251447316062
  47. Audrey Rowland, PH.D.Corona, CA 928801831389238
  48. Joanna Rowles, PHDLos Angeles, CA 900731043524168
  49. Lisa Rowley, PH.D.Newport Beach, CA 926601841424942
  50. Paul Roy, LICENSED PSYCHOLOGISSanta Clara, CA 950511922571736

Source: CMS NPPES, primary taxonomy 103T00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 13 of 51 per resident

  1. West Virginia20
  2. Nebraska19
  3. Maryland19
  4. California19
  5. Maine19
  6. North Dakota18
  7. 50 states and D.C.14

Source: CMS NPPES, primary taxonomy 103T00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

6.2% of these records appear in a Medicare file, against 10.1% 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. California6.2%
  2. United States10.1%

Psychologist records in California, measured

  • In a Medicare file453 of 7,304 · 6.2% here, 10.1% nationally
  • In the CMS Doctors and Clinicians file1,058 · 14.5% here, 18.0% nationally
  • Not updated in five years or more4,318 · 59.1% here, 63.9% nationally
  • Median graduation year2005 · the 1,058 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 103T00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

7,304 NPPES records list psychologist (103T00000X) as their primary taxonomy with a practice address in California: 19 per 100,000 residents against 14 nationally (50 states and D.C.). Los Angeles has 671 of them (9%).

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 York5,045
  2. Pennsylvania2,687
  3. Michigan2,549
  4. Massachusetts2,367

States with a similar rate per 100,000

  1. Maine18.6
  2. Maryland19.1
  3. North Dakota18.2
  4. Nebraska19.3

The largest states

  1. New York5,045
  2. Pennsylvania2,687
  3. Michigan2,549
  4. Massachusetts2,367
  5. Florida2,202

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.