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 9 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. Robert Lum, M.D.Oxnard, CA 930361770589707
  2. Robert Lundahl, MDPalo Alto, CA 943011578675724
  3. Quoc Luu, M.D.Modesto, CA 953551689692808
  4. David Ly, MDVisalia, CA 932771477879864
  5. Dhara Macdermed, MDSan Mateo, CA 944011366616807
  6. Iain Macewan, M.D.San Diego, CA 921211326300401
  7. Meghan MacomberCameron Park, CA 956821720421142
  8. Kaveh MaghsoudiSalinas, CA 939011578889820
  9. Usama Mahmood, MDFountain Valley, CA 927081386848844
  10. Alireza Mahmoudieh, MDMerced, CA 953481720166309
  11. Wilson Mai, MD, PHDSanta Clara, CA 950511285210633
  12. Muhammad Nauman Malik, MDSan Francisco, CA 941431720708993
  13. Paul Mandelin, D.O.Corona, CA 928791124290101
  14. Gina Mansy, M.D.Chula Vista, CA 919141326046855
  15. David Mantik, MDRedding, CA 960011669421012
  16. Mallika Marar, MDStanford, CA 943051417418252
  17. Luis Mariscal, M.D.Bakersfield, CA 933011821231614
  18. C Jane Marmor, MDRedwood City, CA 940621669458014
  19. Sean Maroongroge, M.D.Duarte, CA 910101417451956
  20. Carol Marquez, MDStanford, CA 943051568478014
  21. Sheri Marquez, MDSanta Maria, CA 934541538149224
  22. Andrew Martella, M.D.Stanford, CA 943051962812511
  23. Theodore Masek, MDPalm Desert, CA 922111720073935
  24. James Mason, MDWildomar, CA 925951902955818
  25. Hirsch Matani, MDLos Angeles, CA 900891134625411
  26. Jyoti Mayadev, M.DSan Diego, CA 921031902906902
  27. Susan McCloskey, M.D.Los Angeles, CA 900951811126840
  28. Heather McGee, MD, PHDDuarte, CA 910101447593678
  29. Travers McLoughlin, MDLodi, CA 952421619910346
  30. Jean Mefferd, M.D.La Jolla, CA 920371629062625
  31. Shahil Mehta, MDMountain View, CA 940401942763800
  32. Jay Meisel, M.D.Santa Cruz, CA 950651720140353
  33. Loren Mell, M.D.La Jolla, CA 920931316119704
  34. Paul Menzel, M.D.Burbank, CA 915051891921433
  35. Clifford Merlo, MDLawndale, CA 902601427198597
  36. Shane Mesko, M.D., MBASan Diego, CA 921031699137315
  37. John Meyer, MDSan Francisco, CA 941151164403416
  38. Laura Millender, M.D.South San Francisco, CA 940801184656761
  39. Michael Miller, MDLos Angeles, CA 900741902965593
  40. Paul Miller, MDThousand Oaks, CA 913601992797526
  41. Lynn Million, MDStanford, CA 943051801840798
  42. Ann Minn, M.D.Palo Alto, CA 943041225224991
  43. Amin Mirhadi, MDWest Hollywood, CA 900481336179563
  44. Kavita Mishra, M.D., M.P.H.San Francisco, CA 941431568640076
  45. Brian Missett, MDSanta Clara, CA 950511679651251
  46. James Mitchell, MDWalnut Creek, CA 945981700057569
  47. Priya Mitra, MDLos Angeles, CA 900891174721617
  48. Lloyd Miyawaki, MDGreenbrae, CA 949041497737464
  49. Everett Moding, MDStanford, CA 943051578940045
  50. Aram Modrek, MD, PHDLos Angeles, CA 900891215427695

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.