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 343 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. Timothy Wu, MDMontclair, CA 917631700375656
  2. Tina Wu, M.D.Los Gatos, CA 950321417054768
  3. Tong-Hau Wu, MDHayward, CA 945451215001524
  4. Walter Wu, M.D.Palo Alto, CA 943041891913851
  5. Xipu Wu, MDRowland Heights, CA 917481407942634
  6. Yi-Po Wu, M.D.Stockton, CA 952041427056209
  7. Yih Wu, M.D.La Palma, CA 906231649244146
  8. John Wuchenich, MDStanford, CA 943051144549973
  9. Gisele Wudka, M.D.Calabasas, CA 913021912068370
  10. Richard Wulfsberg, M.D.Encino, CA 914361821102922
  11. Amanda Wulfstat, MDSan Francisco, CA 941181730354820
  12. Phillip Wunder, D.O.Diamond Bar, CA 917651336214766
  13. Wendell Wyatt, M.D.Cathedral City, CA 922341316906696
  14. Howard Wynne, M.D.San Diego, CA 921101801808043
  15. Lori Wynstock, M.D.Pasadena, CA 911051194764589
  16. Jacob WyseSan Diego, CA 921351619599354
  17. Angela Xavier, M.D.San Jose, CA 951291558320432
  18. Jerry Xiao, MD, PHDSan Francisco, CA 941431194585646
  19. Jessica Xiao, MDAntioch, CA 945311164008785
  20. Fan Xie, MDDaly City, CA 940151073691697
  21. Kira Xie, MDLos Angeles, CA 900671518492248
  22. Lijia Xie, MDStanford, CA 943051336535889
  23. Sherry Xie, M.D.Arcadia, CA 910071891711636
  24. Sabrina Ximenez, MDLos Angeles, CA 900151386267284
  25. Yan Xing, MDSan Diego, CA 921031043770001
  26. Shelly Xing Gammon, MDMoreno Valley, CA 925551477799344
  27. Connie XuBaldwin Park, CA 917061619395134
  28. Edward Xu, M.D.Harbor City, CA 907101376920231
  29. Gang Xu, M.D.San Diego, CA 921201760650675
  30. Haishan Xu, M.D.French Camp, CA 952311235426222
  31. Haixin Xu, M.D.Canoga Park, CA 913061124019138
  32. Hao Xu, MDRoseville, CA 956611740368414
  33. Irvin Xu, MDSan Diego, CA 921031275235483
  34. James Xu, MDSan Francisco, CA 941151992324644
  35. Jeffrey Xu, MDSanta Rosa, CA 954031760976757
  36. Jin Xu, MDFolsom, CA 956301760757827
  37. Jing Xu, MDSan Jose, CA 951191982780409
  38. Joseph Xu, MDElk Grove, CA 957581194389809
  39. Jun Xu, M.D.Arcadia, CA 910071497010391
  40. Ling Xu, M.D.Castro Valley, CA 945461073684429
  41. Ling XuOakland, CA 946021316365422
  42. Ran XuSan Francisco, CA 941101891322517
  43. Shelley XuOakland, CA 946091831726652
  44. Yanling Xu, MDSan Francisco, CA 941171770887598
  45. Yidi Xu, M.D.Valencia, CA 913551932498698
  46. Yuwen Xu, MDSan Francisco, CA 941151184774994
  47. Zhehua Xu, M.D.Monterey Park, CA 917541255491106
  48. Xiaonan Xuan, M.D.San Leandro, CA 945771144465683
  49. Wenmei Xue, M.D.Emeryville, CA 946081982652665
  50. Yang Xue, M.DEncinitas, CA 920241487850897

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.