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 407 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. Jane MassengillDanville, CA 945261679010995
  2. Paula Massengill, LCSWOakland, CA 946111396178414
  3. Betty Massey, LCSWMariposa, CA 953381457384323
  4. Olivia MasseyCerritos, CA 907031730812892
  5. Connie Massie, LCSWCorning, CA 960211407847353
  6. Solomon Massin, LCSWSanta Ana, CA 927011942563606
  7. Sharon Massoth, LCSWSan Marcos, CA 920691093830861
  8. Soulafa Massoud, LCSWPerris, CA 925701174657209
  9. Dolores Mast, LCSW 63286Fontana, CA 923351992987242
  10. Gregory Masters, LCSWSanta Ana, CA 927011356434898
  11. Alexandra Masterson, LCSWSan Diego, CA 921241558938381
  12. Tim Masterson, LCSWSacramento, CA 958251346776325
  13. Sofi Masteyan, LCSWGlendale, CA 912051801665922
  14. Aubrie Mastrangelo, LCSWSan Jose, CA 951121447516380
  15. Mary Jo Mastro, LCSWSanta Monica, CA 904011518202936
  16. Erika MastrobuonoPasadena, CA 911031629359153
  17. Paul Mastrofrancesco, LCSWLos Angeles, CA 900251285100982
  18. Jody Mastroianni-Allen, LCSWBerkeley, CA 947091821135740
  19. Amy Masumiya, LCSWLos Angeles, CA 900071619008315
  20. Cindy MataWhittier, CA 906031043407034
  21. Mabel Mata, LCSWRancho Cucamonga, CA 917301285057661
  22. Matthew MataSanta Fe Springs, CA 906701265823546
  23. Marvin MatamorosSan Francisco, CA 941101861386955
  24. Iliana Matamoros CastroLos Angeles, CA 900311124449103
  25. Alana MatayoshiWalnut Creek, CA 945981376992214
  26. Martha Mateo, LCSWLos Angeles, CA 900151215584974
  27. Susana Mateos Leyva, MSWLos Angeles, CA 900071255061321
  28. Patty Matheny, LCSWParadise, CA 959691063633857
  29. William Matherly, LCSWSouth San Francisco, CA 940801063776011
  30. Rita Mathew, MSW,PPSCOakland, CA 946071902038508
  31. Manju Mathews, LCSWConcord, CA 945201265783864
  32. Merissa Mathews, LCSWMurrieta, CA 925621326437286
  33. Priscilla MathewsPleasanton, CA 945661245610575
  34. Alexis Mathias, LCSWCampbell, CA 950081467907212
  35. Amy Mathieson, LCSWMcKinleyville, CA 955191487248191
  36. Diana Mathis, LCSW-26440Helendale, CA 923421518648476
  37. Elecia MathisSunnyvale, CA 940861720953938
  38. Howard Mathis, MSWNorth Hollywood, CA 916061265566343
  39. Lesli Mathis, LCSWSan Diego, CA 921061619009230
  40. Regina Mathis, ACSW, MSWGridley, CA 959481609739093
  41. Rene Mathis, LCSWSan Diego, CA 921451194584086
  42. Carolee Matias, ASWLos Angeles, CA 900041295910867
  43. Gloria Matias-BurgosLoma Linda, CA 923571790433373
  44. Claudia Matias-HernandezLos Angeles, CA 900441386451714
  45. Christine Matich, L.C.S.W.San Diego, CA 921261023394129
  46. Theresa Matich, LCSWSanta Clara, CA 950541962844563
  47. Jane Matijasic, LCSW BCDNapa, CA 945591306852348
  48. Nancy Matloff, MSWSan Diego, CA 921611609893585
  49. Theresa Matocha, LISCWEureka, CA 955011639415300
  50. Michelle Matoff, LCSWSanta Maria, CA 934541912028481

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.