NPPES file of Aug 9, 2026

Clinical Social Worker in California

36,261 NPPES records list clinical social worker with a practice address in California, 93 per 100,000 residents, the 22nd 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 484 of 726.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 1041C0700X · 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, 4,806

  1. Los Angeles4,806
  2. San Diego2,036
  3. San Francisco1,358
  4. Oakland1,130
  5. Sacramento1,120

Clinical Social Worker records in California

  1. Gregory Osberg-Pate, LICSW, MSWTruckee, CA 961611538644901
  2. Julie Osborn, L.C.S.W.Orange, CA 928681760572028
  3. Samantha OsbornFairfield, CA 945341922939263
  4. Scott Osborn, LCSWSan Leandro, CA 945781922171818
  5. Stephen Osborn, MSW, LCSWRedwood City, CA 940611922622174
  6. James Osborne, LCSW, LMSWLong Beach, CA 908221871232181
  7. John Osborne, LCSWWalnut Creek, CA 945951154500908
  8. Marie Osborne, LCSWAuburn, CA 956031134234677
  9. Natalie Osborne, LCSWChula Vista, CA 919111881061992
  10. Kory Osborne-LewisPatton, CA 923691841060902
  11. Rebecca Osburne-Rothstein, LCSWAlameda, CA 945011518415264
  12. Stacey OsderPasadena, CA 911051982734349
  13. Irene OsegueraSan Bernardino, CA 924151851053649
  14. Jocelyne OsegueraEl Monte, CA 917321124664859
  15. Pamela OsegueraOakland, CA 946011578306510
  16. Edna Osepans, LCSWSanta Monica, CA 904041528648573
  17. Constantine OsepyanGrover Beach, CA 934331023459047
  18. Katherine Osgard, LCSWLong Beach, CA 908221023342821
  19. Amanda OsgoodSan Diego, CA 921041942784780
  20. Kathryn Osher, LCSWLos Angeles, CA 900951407190465
  21. Lori Oshiro, LCSWNorwalk, CA 906501124899380
  22. Pamela Oshiro-Fossati, L.C.S.WGilroy, CA 950201154458644
  23. Flin OshunFair Oaks, CA 956281881355584
  24. Patricia Osman, MSW, CMSWLos Angeles, CA 900731659475747
  25. Carol Osmer, MSW, LCSWConcord, CA 945201568526994
  26. Jessica Osmond, LCSWBerkeley, CA 947041679822910
  27. Alex OsorioChino Hills, CA 917091598105868
  28. Claire Osorio, LCSWLos Angeles, CA 900121992474258
  29. Emilio OsorioSan Mateo, CA 944031841316577
  30. Miguel OsorioLos Angeles, CA 900591639361017
  31. Monica OsorioFremont, CA 945381548510449
  32. Salvador OsorioLos Angeles, CA 900051699031195
  33. Maria Osornio, LCSWMerced, CA 953481477030104
  34. Marjorie Ospeck, LCSWSan Diego, CA 921031124446893
  35. Paulina Ospina-Mallarino, LCSWPasadena, CA 911011992971022
  36. Kimberly Ossman, LCSWOrange, CA 928681699008755
  37. Kathleen Osta, LCSWPasadena, CA 911071891428934
  38. Michael Ostash, LCSWSanta Rosa, CA 954031033030655
  39. Victoria Osteen, LCSWSan Francisco, CA 941341033403027
  40. Leena Osteraas, L.C.S.W.San Francisco, CA 941181891850715
  41. Hypatia Ostojic, LCSWSanta Monica, CA 904041093055154
  42. Montgomery OstranderPalm Springs, CA 922641023430667
  43. Reanne OstranderYuba City, CA 959911194217117
  44. Daniel Ostrow, MSWSan Francisco, CA 941071609807791
  45. Tabitha OstrowskySanta Clarita, CA 913501184590630
  46. Helen Ostruske, L.C.S.W.Menlo Park, CA 940251750492708
  47. Adamary OsunaSan Fernando, CA 913401376356386
  48. Christa Osuna, LCSWLoma Linda, CA 923571245334416
  49. Leslie Osuna, LCSWSanta Ana, CA 927051275187171
  50. Mariana OsunaSanta Cruz, CA 950621497214936

Source: CMS NPPES, primary taxonomy 1041C0700X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 22 of 51 per resident

  1. Illinois109
  2. New Jersey105
  3. Alaska103
  4. California93
  5. Virginia93
  6. Delaware91
  7. 50 states and D.C.93

Source: CMS NPPES, primary taxonomy 1041C0700X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

6.0% of these records appear in a Medicare file, against 11.7% 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. California6.0%
  2. United States11.7%

Clinical Social Worker records in California, measured

  • In a Medicare file2,182 of 36,261 · 6.0% here, 11.7% nationally
  • In the CMS Doctors and Clinicians file4,012 · 11.1% here, 19.1% nationally
  • Not updated in five years or more16,389 · 45.2% here, 52.9% nationally
  • Median graduation year2012 · the 4,008 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 1041C0700X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

36,261 NPPES records list clinical social worker (1041C0700X) as their primary taxonomy with a practice address in California: 93 per 100,000 residents against 93 nationally (50 states and D.C.). Los Angeles has 4,806 of them (13%).

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 York29,293
  2. Massachusetts17,815
  3. Michigan17,644
  4. North Carolina15,561

States with a similar rate per 100,000

  1. Virginia92.9
  2. Delaware90.6
  3. Kentucky89.9
  4. Idaho89.1

The largest states

  1. New York29,293
  2. Massachusetts17,815
  3. Michigan17,644
  4. North Carolina15,561
  5. Illinois13,637

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.