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 350 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. Qi Yu, D.O.Loma Linda, CA 923541467706325
  2. Raymond Yu, MDOakland, CA 946111487732251
  3. Sally Yu, MDSouth San Francisco, CA 940801669550273
  4. Suet Yin Yu, M.D.Livermore, CA 945501740201292
  5. Thomas Yu, M.D.San Gabriel, CA 917761588844104
  6. Xin Yi Yu, MDSacramento, CA 958171245954866
  7. Emily Yuan, M.D.Los Angeles, CA 900891598909871
  8. Julia Yuan, MDLa Jolla, CA 920371861194441
  9. Jun Yuan, M.D.Corona, CA 928811962461368
  10. Stanley Yuan, MDWest Hollywood, CA 900481134688906
  11. Sumeyra Yucelen, MDNewport Beach, CA 926631972246734
  12. Chifoo Yue, MDCypress, CA 906301952374100
  13. Daniel Yuen, M.D.Sacramento, CA 958231659450047
  14. Edwin Yuen, M.D.San Francisco, CA 941121003840679
  15. Eric Yuen, M.D.Encinitas, CA 920241598765968
  16. Ronald Yuen, MDOakland, CA 946111932287703
  17. Silva Yuen, MDSan Francisco, CA 941271336201755
  18. Steven Yuen, MDSan Jose, CA 951191326124850
  19. Monita Yuen-Green, M.D.San Francisco, CA 941181013000868
  20. Bianca Yuh, M.D.San Francisco, CA 941041073049466
  21. Robert Yuhas, MDSolana Beach, CA 920751700897642
  22. Denise Yun, MDBerkeley, CA 947091770655508
  23. Eun Yun, M.D.Los Angeles, CA 900571609987486
  24. Kyu Yun, MDGarden Grove, CA 928401366491383
  25. Thomas Yun, MDOakland, CA 946021336431568
  26. Doris Yung, MDRamona, CA 920651730386863
  27. Gregory Yung, DOLong Beach, CA 908131568111466
  28. John Yung, M.D.Pasadena, CA 911051871830828
  29. Kam-Har Yung, MDMountain View, CA 940401669554879
  30. Nathan Yung, MDSan Diego, CA 921031700318557
  31. Steven Yung, M.D.San Diego, CA 921031689636656
  32. Jan Yuo, M.D., M.P.H.Montrose, CA 910201528096716
  33. Ilana Yurkiewicz, M.D.Stanford, CA 943051245625490
  34. Jandark Yuseif, M.D.San Diego, CA 921031114361284
  35. Almira Yusi-Lenn, MDBeaumont, CA 922231992776272
  36. Andrew YusranAntioch, CA 945311720616550
  37. Syed Yusuf, M.D.Fontana, CA 923351427303817
  38. Sara YusufalyLake Elsinore, CA 925301043745185
  39. Yasmin Yusufaly, M.DLoma Linda, CA 923571811909872
  40. Ibrahim Yusufu, MDCitrus Heights, CA 956211528645355
  41. Mohammad Yusufzai, M.D.Sacramento, CA 958161932362175
  42. Sultan Yusufzai, M.D.Rancho Cordova, CA 956701831479815
  43. Kamalullah Yusufzie, M.D.Modesto, CA 953551497710594
  44. Marshall Zablen, MDVan Nuys, CA 914111275866519
  45. Melanie Zabow, M.DAliso Viejo, CA 926561801915954
  46. Malak Zacca Shammas, MDBeverly Hills, CA 902101902957764
  47. Lisa Zacharewicz, M.D.San Francisco, CA 941071609932045
  48. Alvin Zachariah, M.D.Stockton, CA 952031932178613
  49. Chemanoor Zachariah, MDTracy, CA 953761780655951
  50. Rajive Zachariah, M.D.Mission Viejo, CA 926911295155497

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.