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 97 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. Jill Oakley, PSY.D.Reseda, CA 913351881830008
  2. Mark Oakley, PHDBeverly Hills, CA 902101922142132
  3. Christine Oates, PSYDWalnut Creek, CA 945981093342198
  4. Michael Obarski, PH.D.La Canada Flintridge, CA 910111053477307
  5. Fern Obatake-Chang, PHDLos Angeles, CA 900121316696354
  6. Doris Oberlander, PSYDCorcoran, CA 932121619298841
  7. Ana Ochoa, PSYDSherman Oaks, CA 914231033399639
  8. Cecilia Ochoa, PSY.D.Woodland, CA 956951295894079
  9. Lee OckendenDavis, CA 956161831738467
  10. Adria Odonnell, PSY.D.San Diego, CA 921311285853796
  11. Anthony OdoziValencia, CA 913551063600732
  12. Toluwanimi OduleyeFountain Valley, CA 927081982077715
  13. Cherie Oertel, PHDSan Jose, CA 951281568260446
  14. Nicholas OeserPetaluma, CA 949541396098133
  15. Ronald Offenstein, PHDRiverside, CA 925061811091978
  16. Madeline Ofina, PHDSan Diego, CA 921031548563372
  17. Valentina OgaryanLos Angeles, CA 900951609289990
  18. Monique OglesbyEl Cajon, CA 920201831240720
  19. William Oglesby, PSY.D.San Bernardino, CA 924151912326117
  20. Chan Sup OhSan Diego, CA 921101194642181
  21. Jane Oh, PH.D.Los Angeles, CA 900331689868754
  22. Un Chu Oh, PSY.D., LMFTGlendale, CA 912021063531523
  23. Sven Ohah, PSY.D.San Jose, CA 951251801800545
  24. Deborah Ohanesian, PH.DFresno, CA 937101699972919
  25. Robert Ohrling, PH.,DCathedral City, CA 922341518994318
  26. Michele Okonski, PSY.D.Aliso Viejo, CA 926561982171716
  27. Calpurnia OkwuoneSanta Barbara, CA 931101912460148
  28. Edward Oleksy, PH.D.Chowchilla, CA 936101568807972
  29. Amy Jane Oleson, PSYDSan Diego, CA 921081326343245
  30. Dennis Oleson, PSYCHOLOGISTChino, CA 917101487097093
  31. Lisa Oliver, PH.D.Santa Clara, CA 950501841691300
  32. Glenda Olivier, PHDSan Diego, CA 921311700176351
  33. Judith Olmstead, PH.D.San Diego, CA 921031659399236
  34. Brian Olowude, PHDFresno, CA 937041124031364
  35. Bonnie Olsen, PHDLos Angeles, CA 900331720016181
  36. Perry Olshan, PHDSan Francisco, CA 941211932231362
  37. Lindsay Olson, PSYDSacramento, CA 958261194499053
  38. Maria Olvera, PH.DOrange, CA 928681568550101
  39. Tiffany Omeara, PH.D.La Jolla, CA 920931629243670
  40. Philip Oncley, PHDLos Alamitos, CA 907201689692832
  41. Daniel OnoeFairfield, CA 945331568011302
  42. Charles OnuboguHalf Moon Bay, CA 940191831520840
  43. Jeff Oostyen, PSY.D.Calipatria, CA 922331861821878
  44. Annalise Ophelian, PSYDSan Francisco, CA 941171265598247
  45. Ana Ordaz, NCCSanta Monica, CA 904041669000519
  46. Sarah Ordaz, PH.D.Menlo Park, CA 940251962835595
  47. Esther Orellana, PH.D.Santa Cruz, CA 950601376813667
  48. Robert Orkin, PSY.D.Los Alamitos, CA 907201952478570
  49. Linda Ormiston, PH.D.Rohnert Park, CA 949281164635124
  50. Rosa Maria Ornelas, PSYDCommerce, CA 900221043343031

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.