NPPES file of Aug 9, 2026

Addiction Medicine (Internal Medicine) Physician in California

73 NPPES records list addiction medicine (internal medicine) physician with a practice address in California, 0.2 per 100,000 residents, the 21st highest rate of 46. Los Angeles and Fontana have the most; each record links to the provider's NPI and the California license search. Page 2 of 2.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RA0401X · 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, 5

  1. Los Angeles5
  2. Fontana4
  3. Malibu3
  4. Riverside3
  5. San Francisco3

Addiction Medicine (Internal Medicine) Physician records in California

  1. Jonathan Quach, M.DLos Angeles, CA 900951811253909
  2. Parmis Rad, M.D.San Rafael, CA 949011598977522
  3. Sina Radparvar, MDPanorama City, CA 914021902973811
  4. Sangeetha Raghuraman, MDSan Jose, CA 951281396814356
  5. Jonathan Reitman, M.D.Beverly Hills, CA 902111922157320
  6. Douglas Richards, MDFontana, CA 923351194892091
  7. Danielle Ross, DONovato, CA 949451265161335
  8. Ololade Saliu, MDLos Angeles, CA 900141396303830
  9. Russell Sandberg, MDSan Rafael, CA 949011265522528
  10. Richard Scatterday, M.D.Anaheim, CA 928041134474042
  11. Virginia Schaaf, M.D.Greenbrae, CA 949041427125533
  12. Courtney Scott, M.D.Inglewood, CA 903011699906750
  13. Steven Shifflett, MDLakeport, CA 954531558371641
  14. Craig Smith, M.D.Malibu, CA 902651023049483
  15. William Stanley, MDMalibu, CA 902651730128513
  16. Kenneth Starr, M.D.Arroyo Grande, CA 934201861431595
  17. Aung Thu, MDHemet, CA 925431760423560
  18. Mark Towns, M.D.Galt, CA 956321811183643
  19. Robert Treuherz, MDCrestline, CA 923251194796151
  20. Blanca Trevino-Scatterday, MDOrange, CA 928681447321427
  21. Steven Valenti, MDFontana, CA 923351487713137
  22. Kumar Vasudevan, M.D.Los Angeles, CA 900951851749782
  23. Susan Weinstock, MDDel Mar, CA 920141891028791

Source: CMS NPPES, primary taxonomy 207RA0401X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 21 of 46 per resident

  1. New Mexico0.2
  2. Michigan0.2
  3. Florida0.2
  4. California0.2
  5. Virginia0.2
  6. Wyoming0.2
  7. 50 states and D.C.0.2

Source: CMS NPPES, primary taxonomy 207RA0401X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

75.3% of these records appear in a Medicare file, against 73.2% 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. California75.3%
  2. United States73.2%

Addiction Medicine (Internal Medicine) Physician records in California, measured

  • In a Medicare file55 of 73 · 75.3% here, 73.2% nationally
  • In the CMS Doctors and Clinicians file33 · 45.2% here, 44.0% nationally
  • Not updated in five years or more35 · 47.9% here, 45.8% nationally
  • Median graduation year2008 · the 33 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RA0401X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

73 NPPES records list addiction medicine (internal medicine) physician (207RA0401X) as their primary taxonomy with a practice address in California: 0.2 per 100,000 residents against 0.2 nationally (50 states and D.C.). Los Angeles has 5 of them (7%).

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 York68
  2. Florida43
  3. Ohio42
  4. Pennsylvania33

States with a similar rate per 100,000

  1. Virginia0.2
  2. Michigan0.2
  3. Colorado0.2
  4. Arizona0.1

The largest states

  1. New York68
  2. Florida43
  3. Ohio42
  4. Pennsylvania33
  5. New Jersey27

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.