NPPES file of Aug 9, 2026

Addiction (Substance Use Disorder) Counselor in California

27,741 NPPES records list addiction (substance use disorder) counselor with a practice address in California, 71 per 100,000 residents, the 4th highest rate of 51. Los Angeles and Fresno have the most; each record links to the provider's NPI and the California license search. Page 365 of 555.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 101YA0400X · 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, 2,101

  1. Los Angeles2,101
  2. Fresno1,231
  3. Sacramento1,187
  4. San Diego1,015
  5. San Francisco839

Addiction (Substance Use Disorder) Counselor records in California

  1. Ernest NyannLake View Terrace, CA 913421669029211
  2. Martin Nyberg, SUD COUNSELORSan Diego, CA 921101154054443
  3. Lola NyenpanOxnard, CA 930361366006918
  4. Sandra NygaardLancaster, CA 935341558729764
  5. Jessica NygrenRoseville, CA 956611841541810
  6. Lynn Nyhus, RADTTrabuco Canyon, CA 926791063111896
  7. John NyquistSan Francisco, CA 941101558721258
  8. Maria Nzenwa, ATOD COUNSELORLawndale, CA 902601427276955
  9. Richard Nzenwa, ATOD COUNSELORLawndale, CA 902601710105242
  10. Richard Nzenwa, AOD COUNSELORLawndale, CA 902601164640686
  11. Todd O'BergMarysville, CA 959011033772959
  12. Dannielle O'BrienLemon Grove, CA 919451215320510
  13. James O'Brien, SUDCCRialto, CA 923761609255769
  14. Kathryn O'Brien, CAADE, CAADACLake View Terrace, CA 913421114163078
  15. Laci O'Brien, SUDRCOceanside, CA 920561497403026
  16. Michael O'Brien, CADC II, NCAC ISonoma, CA 954761295173854
  17. Veronica O'Brien, C.A.T.C.-IISan Bernardino, CA 924011811109838
  18. Carri O'ConnellVictorville, CA 923951053068544
  19. Deysi O'ConnellHawthorne, CA 902501558170589
  20. Joseph O'ConnellSan Jose, CA 951161235604067
  21. Michael O'Connell, R.A.S.-CA.Santa Rosa, CA 954051891829842
  22. Timothy O'Connell, CATCCardiff, CA 920071972040061
  23. Patrick O'Connor, ASST. DIRECTORSanta Barbara, CA 931011134246671
  24. Tracy O'CullDesert Hot Springs, CA 922401962770735
  25. Michael O'Donnell, CADTPSanta Paula, CA 930601760999031
  26. Thomas O'DonnellSanta Rosa, CA 954011316497357
  27. Victoria O'GaraSan Jacinto, CA 925831790105450
  28. Quinn O'HanlonRoseville, CA 956611356065809
  29. Eamon O'Hara, RADTNewbury Park, CA 913201225506504
  30. Julie O'KeefeRedwood City, CA 940631275890931
  31. Pia O'Keefe, SUDCCLurcerne, CA 954581609481662
  32. Thomas O'LearySanta Ana, CA 927011467927574
  33. Shaun O'Malley, CATC IIPlacerville, CA 956671194033928
  34. Holly O'MearaOrange, CA 928681659000701
  35. Ivan O'NealLemon Grove, CA 919451295312973
  36. Karen O'NealSanta Barbara, CA 931101699825976
  37. Milton O'Neal, COUNSELORFairfield, CA 945331689862781
  38. Stacey O'NealHemet, CA 925431497201305
  39. Vernon O'NealVenice, CA 902911174403125
  40. Georgianna O'Neil, LVNSacramento, CA 958341316156912
  41. Luanne O'Neil, RRWSanta Ana, CA 927051023227790
  42. Patrick O'NeilSanta Fe Springs, CA 906701235794090
  43. Gavin O'NeillOakland, CA 946071376033159
  44. Savannah O'NeillOakland, CA 946051003176637
  45. Kathryn O'NiellSanta Rosa, CA 954011891914651
  46. Brian O'QuinGrass Valley, CA 959451477413359
  47. Sheila O'Quirke, CADCSacramento, CA 958111710163977
  48. Karen O'RearVictorville, CA 923941770603417
  49. Christopher O'RourkeSan Diego, CA 921051831327550
  50. Kevin O'RourkeVictorville, CA 923921740816248

Source: CMS NPPES, primary taxonomy 101YA0400X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 4 of 51 per resident

  1. Alaska135
  2. Ohio95
  3. Oregon95
  4. California71
  5. Maine61
  6. Montana61
  7. 50 states and D.C.28

Source: CMS NPPES, primary taxonomy 101YA0400X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

0.1% of these records appear in a Medicare file, against 1.0% 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. California0.1%
  2. United States1.0%

Addiction (Substance Use Disorder) Counselor records in California, measured

  • In a Medicare file26 of 27,741 · 0.1% here, 1.0% nationally
  • In the CMS Doctors and Clinicians file32 · 0.1% here, 1.7% nationally
  • Not updated in five years or more16,340 · 58.9% here, 57.4% nationally
  • Median graduation year2015 · the 32 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 101YA0400X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

27,741 NPPES records list addiction (substance use disorder) counselor (101YA0400X) as their primary taxonomy with a practice address in California: 71 per 100,000 residents against 28 nationally (50 states and D.C.). Los Angeles has 2,101 of them (8%).

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. Ohio11,255
  2. New York5,180
  3. Washington4,416
  4. Oregon4,037

States with a similar rate per 100,000

  1. Maine61.3
  2. Montana61.0
  3. North Dakota56.8
  4. Rhode Island51.1

The largest states

  1. Ohio11,255
  2. New York5,180
  3. Washington4,416
  4. Oregon4,037
  5. North Carolina3,066

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.