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 353 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. Yan Zhang, MDOntario, CA 917641346264660
  2. Yan Ping Zhang, MDEl Monte, CA 917311306884317
  3. Yixi Zhang, M.D.San Jose, CA 951241457709800
  4. Yolanda Zhang, DOIrvine, CA 926181790363174
  5. Yong Zhang, MDWalnut Creek, CA 945961831277920
  6. Zheng-Gang Zhang, M.D.San Jose, CA 951121467554071
  7. Diana Zhao, MDNewport Beach, CA 926631295199768
  8. Evan Zhao, DOPanorama City, CA 914021043876782
  9. Hui Zhao, M.D.West Hollywood, CA 900481861604829
  10. Jing Zhao, MDSonoma, CA 954761376621862
  11. Lu Zhao, D.O.Visalia, CA 932911578094009
  12. Meng Zhao, MDRancho Mirage, CA 922701851385009
  13. Min ZhaoChula Vista, CA 919101164846234
  14. Susan Zhao, MDSan Jose, CA 951281427184811
  15. Xinxia ZhaoLos Angeles, CA 900331700931219
  16. Zijun Zhao, MDSan Jose, CA 951281326629130
  17. David ZhengBeverly Hills, CA 902111710484647
  18. Wei Hao Zheng, MD, MSSan Jose, CA 951281295232148
  19. Xiaona Zheng, MDLos Angeles, CA 900341588735484
  20. Yunli Zheng, M.DRoseville, CA 956611245215839
  21. Mary Zhitnikova, D.O.Fresno, CA 937201407114796
  22. Chanjuan Zhong, MDMountain View, CA 940401821550468
  23. Kun Zhong, MDEscondido, CA 920261619980901
  24. Lily Zhong, DOSan Gabriel, CA 917761578141941
  25. Lily ZhongSan Jose, CA 951281851719736
  26. Yingchao Zhong, MDStanford, CA 943051932842507
  27. Yuan Zhong, MDSan Diego, CA 921201407915069
  28. Zhi Jian Zhong, M.D.San Francisco, CA 941321649466988
  29. Zhihong Zhong, MDAntioch, CA 945091205914389
  30. Leonid Zhornitskiy, MDClovis, CA 936111619027430
  31. Jennifer Zhou, MDSacramento, CA 958231407928229
  32. Jessica Zhou, MDPalo Alto, CA 943051841447356
  33. Julie Zhou, MDFremont, CA 945381023180866
  34. Kaili Zhou, MDOakland, CA 946111720548688
  35. Karen Zhou, MDSacramento, CA 958231649358391
  36. Kenneth Zhou, M.D.Sacramento, CA 958171073969382
  37. Li Zhou, MDSanta Monica, CA 904041184063380
  38. Qinwen Zhou, MDEncinitas, CA 920241912403163
  39. Weizhao Zhou, MDDaly City, CA 940151194877316
  40. Wenbai Zhou, M.D.Turlock, CA 953821841644143
  41. Hairan ZhuLa Mesa, CA 919411336670611
  42. Pengyi Zhu, DOFullerton, CA 928351558941948
  43. Ruo Zhu, MDSan Diego, CA 921341407119019
  44. Sha Sha Zhu, D.OLos Angeles, CA 900341346502283
  45. Shan Zhu, MDCampbell, CA 950081700963642
  46. Xuewei Zhu, MDVacaville, CA 956881770635997
  47. Yanzhi Zhu, MDElk Grove, CA 957581922113240
  48. Zejin Zhu, M.D.Los Angeles, CA 900951881893592
  49. Mona Zia, M.D.Fresno, CA 937031013929207
  50. Samuel Zia, M.D.San Marino, CA 911081285973594

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.