NPPES file of Aug 9, 2026

Radiation Oncology Physician in California

735 NPPES records list radiation oncology physician with a practice address in California, 1.9 per 100,000 residents, the 33rd 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 15 of 15.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2085R0001X · 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, 98

  1. Los Angeles98
  2. San Francisco44
  3. San Diego43
  4. Stanford43
  5. Sacramento32

Radiation Oncology Physician records in California

  1. Florence Wright, M.D.Los Angeles, CA 900951366671612
  2. Jeffrey Wu, M.D.San Luis Obispo, CA 934051336331289
  3. Meiwen Wu, MDSan Francisco, CA 941151255312880
  4. Trudy Wu, MDLos Angeles, CA 900951427510866
  5. Yufan Wu, MDSacramento, CA 958161205499647
  6. Michael XiangLos Angeles, CA 900951477930519
  7. Jessica Xing, MDLong Beach, CA 908051689133548
  8. Henry Yampolsky, M.D.West Hills, CA 913071295704237
  9. Christine YangLong Beach, CA 908061699351288
  10. Gary Yang, MDLoma Linda, CA 923541447231915
  11. Catheryn Yashar, M.DLa Jolla, CA 920931619049129
  12. Jason Ye, M.D.Los Angeles, CA 900891528355047
  13. Jekwon Yeh, MDGlendale, CA 912061417278201
  14. Sue Yom, M.D., PH.D.San Francisco, CA 941431821295833
  15. Stella Yoo, M.D.Los Angeles, CA 900891275944084
  16. Stephanie Yoon, M.D.Duarte, CA 910101346775624
  17. Emi Yoshida, M.D.San Francisco, CA 941431750687083
  18. Carolyn Young, MDMission Viejo, CA 926911598795999
  19. Clarence Young, MDRedwood City, CA 940621649261371
  20. Jennifer Yu, MD, PHDSan Francisco, CA 941151679809925
  21. Jeffrey Yuen, M.D.Whittier, CA 906061831241751
  22. Kaveh Zakeri, M.D.San Jose, CA 951281326380486
  23. Peter Zaki, MDLoma Linda, CA 923501720643844
  24. Sandra Zaky, MDStanford, CA 943051487830741
  25. Phillip Zentner, MDChula Vista, CA 919111063452415
  26. Andrew Zhang, MDLaguna Hills, CA 926531821417627
  27. Michael Zhang, M.D., PH.D.Vallejo, CA 945891861856718
  28. Samuel Zhang, MDTorrance, CA 905051295354702
  29. Xiao Zhao, M.D.Sacramento, CA 958171336585215
  30. Allison Zhong, MDPalo Alto, CA 943041033969860
  31. Arthur Zimmerman, M.D.Torrance, CA 905021154464337
  32. Robert Zimmerman, MDLos Angeles, CA 900151679558811
  33. Uri Zisblatt, M.D.Covina, CA 917231114921616
  34. Perry Zong, MDPalm Desert, CA 922601548729502
  35. Zachary Zumsteg, M.D.Sylmar, CA 913421962729004

Source: CMS NPPES, primary taxonomy 2085R0001X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 33 of 51 per resident

  1. Kentucky1.9
  2. Maine1.9
  3. Colorado1.9
  4. California1.9
  5. Nebraska1.9
  6. Tennessee1.9
  7. 50 states and D.C.2.1

Source: CMS NPPES, primary taxonomy 2085R0001X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

82.9% of these records appear in a Medicare file, against 82.3% 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. California82.9%
  2. United States82.3%

Radiation Oncology Physician records in California, measured

  • In a Medicare file609 of 735 · 82.9% here, 82.3% nationally
  • In the CMS Doctors and Clinicians file545 · 74.1% here, 74.0% nationally
  • Not updated in five years or more406 · 55.2% here, 54.6% nationally
  • Median graduation year2005 · the 545 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2085R0001X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

735 NPPES records list radiation oncology physician (2085R0001X) as their primary taxonomy with a practice address in California: 1.9 per 100,000 residents against 2.1 nationally (50 states and D.C.). Los Angeles has 98 of them (13%).

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. Florida520
  2. New York449
  3. Texas449
  4. Pennsylvania383

States with a similar rate per 100,000

  1. Colorado1.9
  2. Nebraska1.9
  3. Tennessee1.9
  4. Delaware1.8

The largest states

  1. Florida520
  2. New York449
  3. Texas449
  4. Pennsylvania383
  5. Ohio298

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.