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 5 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. John Kim, M.D.San Diego, CA 921341114102639
  2. Ki Kim, MDSan Francisco, CA 941071295929636
  3. Brian Knapp, MDVallejo, CA 945891528146362
  4. Tien-Hoa Ko, M.D.Commerce, CA 900401912915489
  5. Elliott Kornhauser, MDOrange, CA 928681508946716
  6. Robert Kosnik, M.D.San Francisco, CA 941151417982737
  7. Roman Kownacki, MDRichmond, CA 948011730264409
  8. Constantine Kulkoff, D.O.Salinas, CA 939011316574452
  9. Tack Lam, MDLos Angeles, CA 900271285834861
  10. Susan Lambert, MDVallejo, CA 945891720166549
  11. Michael Land, D.O.Newport Beach, CA 926601184057291
  12. Murray Lappe, M.D.Beverly Hills, CA 902101437319217
  13. Charles Laroche, MDOakland, CA 946111679623474
  14. Shane LavinPetaluma, CA 949541538584982
  15. Dionisio Lazaro, M.D.City Of Industry, CA 917481508153842
  16. Hai Le, M.D.Los Angeles, CA 900451427174887
  17. Brian Lee, MDIrwindale, CA 917061912070327
  18. Loretta Lee, M.D.Santa Ana, CA 927011922365527
  19. Pearlene Lee, M.D.San Francisco, CA 941431750647129
  20. Sandra Lee, MDSouth San Francisco, CA 940801629128426
  21. Seung Lee, M.D.Los Angeles, CA 900121568726404
  22. Tracy Lee, M.D.Irvine, CA 926121598991283
  23. Yannick Leguyader, MDSan Francisco, CA 941101316012065
  24. Bruce Leistikow, MDDavis, CA 956161265449169
  25. Stefano Leitner, MD, MPHSan Francisco, CA 941431578126702
  26. James Lemus, MDLos Angeles, CA 900401851487359
  27. Arturo Leon, M.D.San Diego, CA 921231669443701
  28. Jia Li, M.D., M.P.H.Colton, CA 923241801016522
  29. Zizhuang Li, M.D.Moreno Valley, CA 925531578762704
  30. Vivian LiaoSacramento, CA 958171386080356
  31. Zhong Ling, MDStockton, CA 952101912085820
  32. Jodi Lipson-Cassutt, DOBaldwin Park, CA 917061437226446
  33. Ulrike Luderer, MDIrvine, CA 926121699855858
  34. Nancy Ngoc Giao Ly, MD, MPHWalnut Creek, CA 945981598050205
  35. Steven Madhavan, MD, MPHOxnard, CA 930361881746659
  36. Stephen Mandaro, M.D.Fair Oaks, CA 956281225369051
  37. Amarjit Mangat, MDFresno, CA 937201508944323
  38. Benedict Marciano, MDSan Ramon, CA 945831548379621
  39. Arnold Markman, MDSan Diego, CA 921201669520466
  40. Thomas Marsella, M.D.San Francisco, CA 941141982716460
  41. Artemio Martin, M.D.Rancho Cucamonga, CA 917301063537959
  42. Richard Martin, M.D.Saint Helena, CA 945741124412572
  43. Kathryn Mason, MDBakersfield, CA 933011679640502
  44. Jarrod Matthei, M.D.Los Angeles, CA 900951053738948
  45. Zaw Maung, MD, MPHSan Mateo, CA 944011508274424
  46. Bob McClure, M.D.La Mirada, CA 906381942275987
  47. Ellyn McIntosh, M.D.Torrance, CA 905041639415227
  48. David McKinney, MDOroville, CA 959651285953067
  49. Raymond Meister, MDSan Francisco, CA 941101104903632
  50. Rose Melgar, M.D.Union City, CA 945871386716199

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.