NPPES file of Aug 9, 2026

Occupational Medicine Physician in California

415 NPPES records list occupational medicine physician with a practice address in California, 1.1 per 100,000 residents, the 14th highest rate of 50. San Diego and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 2 of 9.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2083X0100X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

San Diego has the most, 37

  1. San Diego37
  2. San Francisco24
  3. Los Angeles23
  4. Sacramento16
  5. Oakland11

Occupational Medicine Physician records in California

  1. Stephen Born, MDSan Francisco, CA 941101548372691
  2. James Boyle, MDRedwood City, CA 940631306924956
  3. Ganna Breland, D.O.San Diego, CA 921211316141898
  4. Timothy Bridge, MDSan Francisco, CA 941271518165414
  5. Dana Brockmann, MDSan Bernardino, CA 924081619537446
  6. Samuel Brown, MDVacaville, CA 956881598843336
  7. Sonya Buchanan, M.D.Irvine, CA 926181053439083
  8. Brian Buder, M.D.Santa Ana, CA 927051477844405
  9. Michael Bugola, MDSacramento, CA 958251104976901
  10. Arnold Bunyaviroch, MDRedwood City, CA 940631437237096
  11. Gilbert Bush, MEDICAL DOCTOROntario, CA 917621669578241
  12. Frederic Butler, MDBrawley, CA 922271801896907
  13. Leon Bybee, M.D.Pomona, CA 917661043331697
  14. Michael Byer, M.D.Oxnard, CA 930361841324928
  15. Joel Canga, M.D.Pittsburg, CA 945651790960771
  16. Melinda Carol, MD MPHFremont, CA 945381053449918
  17. James Caviness, M.D.Camp Pendleton, CA 920551619917234
  18. Wayne Chang, MDOrange, CA 928681306926076
  19. Carrie Chanson, M.D., DR.PH, MPMSan Bernardino, CA 924081366767485
  20. Zhiqiang Chen, M.D.Manteca, CA 953371255663175
  21. Jerome Chester, MDCupertino, CA 950141366529299
  22. Ai Chien, M.D.San Francisco, CA 941141316301138
  23. Oliver Chiong, M.D.Lemoore, CA 932461063851962
  24. Khin Chit, MDStockton, CA 952101881801470
  25. Peter Chiu, MDMilpitas, CA 950351689751513
  26. Christine ChoGardena, CA 902481942760939
  27. Larry Cho, M.D.Bakersfield, CA 933011487838090
  28. Hearan Choo, M.D.San Francisco, CA 941041851416846
  29. Amarilda Christensen, M.D.Rancho Cucamonga, CA 917301649476565
  30. Jessica Chuang, M.D.Orange, CA 928681861802613
  31. Craig Clark, PA-CRiverside, CA 925061952015802
  32. Linda Clever, MDSan Francisco, CA 941431871558932
  33. Donna Cloughen, D.O.Los Angeles, CA 900451548381932
  34. Michael Cohen, MDRoseville, CA 956611699886556
  35. Richard Cohen, MDSaratoga, CA 950701063208676
  36. Michael Collins, DOAnaheim, CA 928051407920002
  37. George Colson, M.D.Chula Vista, CA 919101023028503
  38. Craig Conlon, M.D.Agoura Hills, CA 913011114175510
  39. Jerald Cook, M.D.Twentynine Palms, CA 922781851551816
  40. John Cross, M.D.San Diego, CA 921031205989985
  41. Mark Cullen, MDStanford, CA 943051215919956
  42. Alexis Dasig, MDModesto, CA 953551639125578
  43. Cecilie Deza, M.D.Bakersfield, CA 933011538343041
  44. Robert Dinenberg, M.D.La Jolla, CA 920371841436706
  45. Tai Do, MDSan Diego, CA 921361124272679
  46. Thai Do, MDBaldwin Park, CA 917061639240559
  47. William Downs, M.D.Ontario, CA 917611851593636
  48. David Dubin, M.D.Topanga, CA 902901265633564
  49. Anthony Dubose, M.DRedwood City, CA 940621891840955
  50. Thanh Duong, MDSan Diego, CA 921231699034926

Source: CMS NPPES, primary taxonomy 2083X0100X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 14 of 50 per resident

  1. Maryland1.1
  2. Connecticut1.1
  3. New Hampshire1.1
  4. California1.1
  5. New Mexico1.0
  6. Alaska1.0
  7. 50 states and D.C.0.8

Source: CMS NPPES, primary taxonomy 2083X0100X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

29.6% of these records appear in a Medicare file, against 26.1% 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. California29.6%
  2. United States26.1%

Occupational Medicine Physician records in California, measured

  • In a Medicare file123 of 415 · 29.6% here, 26.1% nationally
  • In the CMS Doctors and Clinicians file51 · 12.3% here, 10.7% nationally
  • Not updated in five years or more311 · 74.9% here, 70.9% nationally
  • Median graduation year1995 · the 51 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2083X0100X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

415 NPPES records list occupational medicine physician (2083X0100X) as their primary taxonomy with a practice address in California: 1.1 per 100,000 residents against 0.8 nationally (50 states and D.C.). San Diego has 37 of them (9%).

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. Texas168
  2. Ohio109
  3. Pennsylvania103
  4. Washington102

States with a similar rate per 100,000

  1. New Hampshire1.1
  2. New Mexico1.0
  3. Connecticut1.1
  4. Maryland1.1

The largest states

  1. Texas168
  2. Ohio109
  3. Pennsylvania103
  4. Washington102
  5. Colorado93

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.