NPPES file of Aug 9, 2026

Psychiatry Physician in California

8,673 NPPES records list psychiatry physician with a practice address in California, 22 per 100,000 residents, the 10th 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 115 of 174.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2084P0800X · 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, 987

  1. Los Angeles987
  2. San Francisco763
  3. San Diego527
  4. Sacramento331
  5. Palo Alto215

Psychiatry Physician records in California

  1. Chiamaka Nwosu, MDTorrance, CA 905021891283206
  2. Jonathan Nye, MDSan Francisco, CA 941101194936484
  3. Madeline Nykamp, MDSacramento, CA 958171821659103
  4. Matthew O'Brien, MDAtascadero, CA 934221376002600
  5. Megan O'Brien, MDSan Francisco, CA 941431861029183
  6. Frances O'SullivanVentura, CA 930031033233077
  7. Ada Obah, NPLong Beach, CA 908041114670882
  8. Christine Obata, M.D.Fresno, CA 937011780829119
  9. Felicia Obialo, MDSan Diego, CA 921031396327763
  10. Laura Obit, D.O.West Hollywood, CA 900481740623552
  11. Laura OblerLos Angeles, CA 900241013448711
  12. Marta Obler, MDFresno, CA 937021871671602
  13. Marina Obolnikov, M.D.Redwood City, CA 940631174732713
  14. Gabriela Obrocea, M.D.Woodland Hills, CA 913671396766580
  15. Herbert Ochitill, MDSan Francisco, CA 941101629146626
  16. Enrique Ochoa, M.D., PHDSacramento, CA 958411962484741
  17. Jennifer Oday, M.D.Norwalk, CA 906501760545693
  18. Ariel Odlum, MDLoma Linda, CA 923541700527140
  19. Thadeus Odom, MDSacramento, CA 958171588120125
  20. Aruby Odom-White, MDLos Angeles, CA 900111134246788
  21. Fabian Ogala, MDGardena, CA 902481265516793
  22. David Ogami, M.D.San Francisco, CA 941181699841809
  23. Michael Ogata, MDSylmar, CA 913421285160903
  24. Lawrence Ogbechie, MDLong Beach, CA 908061003868217
  25. Onyekachi Ogbologu, PMHNP-BCBakersfield, CA 933141073445987
  26. Chinyere Ogbonna, M.D., M.P.HSan Jose, CA 951261730405770
  27. Lucy Ogbu-Nwobodo, MDSan Francisco, CA 941021700264116
  28. Thomas Ogden, M.D.San Francisco, CA 941181629375670
  29. Olaoluwapo Ogunorunyinka, MDBurbank, CA 915051619596640
  30. Elizabeth Ogunrinde, MD, PHDPalo Alto, CA 943041699354803
  31. Kisani Ogwaro, M.D.San Carlos, CA 940701518128883
  32. Cristine Oh, MDWalnut Creek, CA 945971972189686
  33. Jaehoon Oh, M.D.La, CA 900571487606356
  34. Maurice Ohayon, MD, DSC, PHDStanford, CA 943051740888296
  35. Ikechukwu Ohiaeri, M.D.Victorville, CA 923921063423903
  36. Etuajie Oiyemhonlan Halbert, DOSan Leandro, CA 945781932669082
  37. Priti Ojha, MDSan Diego, CA 921031760897284
  38. Rashi Ojha, MDMountain View, CA 940401679151864
  39. Thomas Okamoto, M.D.Santa Ana, CA 927051235178021
  40. David Okikawa, MDLos Angeles, CA 900241033869243
  41. Robert Okin, MDNapa, CA 945581891863809
  42. Nkechi Okoro, MDStanford, CA 943051144857178
  43. Uchenna OkoyeLos Angeles, CA 900241164840708
  44. Catherine OksasSan Francisco, CA 941431225723109
  45. Maxwell OkunolaLos Angeles, CA 900111053082925
  46. Ayodeji Okusanya, M.D.San Bernardino, CA 924081700230844
  47. Ernest Okwuonu, M.D.Palo Alto, CA 943041639735665
  48. Yanira Olaya, M.D.San Diego, CA 921031174679047
  49. Robert Oldham, M.D.Fresno, CA 937061356379507
  50. Julie Oldroyd, M.D.Newport Beach, CA 926601386899482

Source: CMS NPPES, primary taxonomy 2084P0800X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 10 of 51 per resident

  1. Maryland23
  2. Maine23
  3. Hawaii23
  4. California22
  5. Pennsylvania21
  6. New Hampshire19
  7. 50 states and D.C.17

Source: CMS NPPES, primary taxonomy 2084P0800X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

67.4% of these records appear in a Medicare file, against 68.5% 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. California67.4%
  2. United States68.5%

Psychiatry Physician records in California, measured

  • In a Medicare file5,843 of 8,673 · 67.4% here, 68.5% nationally
  • In the CMS Doctors and Clinicians file3,298 · 38.0% here, 42.4% nationally
  • Not updated in five years or more4,714 · 54.4% here, 56.2% nationally
  • Median graduation year2005 · the 3,295 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2084P0800X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

8,673 NPPES records list psychiatry physician (2084P0800X) as their primary taxonomy with a practice address in California: 22 per 100,000 residents against 17 nationally (50 states and D.C.). Los Angeles has 987 of them (11%).

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 York6,589
  2. Texas3,318
  3. Florida2,744
  4. Massachusetts2,736

States with a similar rate per 100,000

  1. Hawaii23.1
  2. Maine23.4
  3. Maryland23.5
  4. Pennsylvania20.5

The largest states

  1. New York6,589
  2. Texas3,318
  3. Florida2,744
  4. Massachusetts2,736
  5. Pennsylvania2,662

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.