NPPES file of Aug 9, 2026

Internal Medicine Physician in California

17,696 NPPES records list internal medicine physician with a practice address in California, 45 per 100,000 residents, the 17th highest rate of 51. Los Angeles and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 162 of 354.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · 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, 1,423

  1. Los Angeles1,423
  2. San Francisco1,318
  3. San Diego961
  4. Sacramento601
  5. Oakland432

Internal Medicine Physician records in California

  1. Michael Koontz, MDMonterey, CA 939401245410588
  2. Jacob Koopman, DOFountain Valley, CA 927081942798061
  3. Ghazal Kooshk Jalali, MDLong Beach, CA 908061154843571
  4. Shruthi Kooturu, MDModesto, CA 953501740432095
  5. Abigail Kopecky, M.D.Rancho Cordova, CA 956551932427895
  6. Joseph Kopecky, MDWoodland Hills, CA 913671093874612
  7. Catherine Koper, MDNewport Beach, CA 926631245466929
  8. Eric Kopf, MDNapa, CA 945581215001532
  9. Jacob Kopp, M.D.Grass Valley, CA 959451073054409
  10. Zoe KoppSan Francisco, CA 941151194229187
  11. Jeffrey Kopstein, DOOxnard, CA 930301487041158
  12. Lavanya Korabathina, MDEscondido, CA 920251255577961
  13. James Korb, MDLos Angeles, CA 900341346317245
  14. Karin Kordas, M.D.Escondido, CA 920251043236292
  15. Neil Koris, MDOakland, CA 946111053483867
  16. Irina Korman Dolomis, M.D.Lincoln, CA 956481851492136
  17. Daniel Korn, MDOakland, CA 946111114005998
  18. Nurit Korn, MDSanta Monica, CA 904031154554061
  19. Paul Korn, MDWalnut Creek, CA 945981063590164
  20. Adva Kornblit, M.D.La Jolla, CA 920371609119031
  21. Murray Kornblit, M.D.San Diego, CA 921201932181682
  22. Lily Kornbluth, M.D.San Francisco, CA 941151902260235
  23. Richard Kornbluth, M.D., PH.D.San Diego, CA 921091245288240
  24. Justine Korolyov, M.D.Los Angeles, CA 900661124461736
  25. Sharon Korr, MDWoodland Hills, CA 913671467511048
  26. Tatiana Korshunova, MDAuburn, CA 956021093121535
  27. Philip Korsun, DOPanorama City, CA 914021053872309
  28. Alexander Korsunsky, M.D.San Jose, CA 951291427088236
  29. Leah Kory, MDVentura, CA 930031962559294
  30. Lara Kose, MDEncino, CA 914361134649007
  31. Hiren KoshiyaVictorville, CA 923951922799063
  32. Biljana Kostic, M.D.Bermuda Dunes, CA 922031184703621
  33. Stela Kostova-Abadjieva, MDTustin, CA 927801164791265
  34. Shanu Kotak, MDRoseville, CA 956611750469474
  35. Vijay KotechaSan Jose, CA 951271578982815
  36. F Koteira, M.D.Loma Linda, CA 923541538188768
  37. Megha KothaFremont, CA 945381851902506
  38. Amit Kothari, M.D.Los Angeles, CA 900731023298189
  39. Mansi Kothari, M.D.Orange, CA 928681093002792
  40. Harsha Kothiya, MBBS, MDModesto, CA 953561174101315
  41. Zar Kotlarsic, DOPasadena, CA 911051285373043
  42. Hardeep Kour, MDFremont, CA 945551477059491
  43. David Kovacs, MDMission Viejo, CA 926911861633083
  44. Marina Kovalevsky, M.D.Los Angeles, CA 900461144377607
  45. Gerald Kovar, M.D.Tarzana, CA 913561306883699
  46. Stephanie Koven, M.D.Los Angeles, CA 900481417069295
  47. Mark KowalczykSan Diego, CA 921031376106344
  48. Sandra Koyama, MDBaldwin Park, CA 917061548331507
  49. Kevin Kozakowski, DOSan Diego, CA 921031093574410
  50. Philip Kozan, MDLos Angeles, CA 900951417417130

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 17 of 51 per resident

  1. New Jersey50
  2. New Hampshire48
  3. Minnesota46
  4. California45
  5. Florida45
  6. Ohio45
  7. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

79.5% of these records appear in a Medicare file, against 78.7% 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. California79.5%
  2. United States78.7%

Internal Medicine Physician records in California, measured

  • In a Medicare file14,068 of 17,696 · 79.5% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file11,077 · 62.6% here, 61.4% nationally
  • Not updated in five years or more10,832 · 61.2% here, 55.4% nationally
  • Median graduation year2004 · the 11,065 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

17,696 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in California: 45 per 100,000 residents against 44 nationally (50 states and D.C.). Los Angeles has 1,423 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. New York12,067
  2. Florida10,151
  3. Texas9,175
  4. Pennsylvania7,300

States with a similar rate per 100,000

  1. Minnesota45.9
  2. Ohio44.8
  3. New Hampshire48.0
  4. Maine42.8

The largest states

  1. New York12,067
  2. Florida10,151
  3. Texas9,175
  4. Pennsylvania7,300
  5. Illinois7,238

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.