NPPES file of Aug 9, 2026

Diagnostic Radiology Physician in California

4,500 NPPES records list diagnostic radiology physician with a practice address in California, 12 per 100,000 residents, the 31st highest rate of 51. Los Angeles and San Diego have the most; each record links to the provider's NPI and the California license search. Page 74 of 90.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2085R0202X · 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, 594

  1. Los Angeles594
  2. San Diego373
  3. San Francisco336
  4. Stanford235
  5. Sacramento226

Diagnostic Radiology Physician records in California

  1. Chandler Shyu, MDColton, CA 923241265447106
  2. Michele Sibley, M.D.Sacramento, CA 958161225113855
  3. Saif Siddiqi, M.D.Santa Ana, CA 927051376579433
  4. Arsalan Siddiqui, M.D.Bakersfield, CA 933061083975361
  5. Sariya Siddiqui, MDStanford, CA 943051679195259
  6. Kunal Sidhar, M.D.Dana Point, CA 926291568782530
  7. Angela Sie, MDLong Beach, CA 908061932181419
  8. Ryan SiebergSan Francisco, CA 941101750772638
  9. Justin Siegal, MDOakland, CA 946091639184518
  10. Neil Siegel, MDAnaheim, CA 928011548337033
  11. Richard Siegel, MDSanta Maria, CA 934541396877841
  12. Richard Sigel, M.D.Walnut Creek, CA 945981720020902
  13. Joel Sigeti, MDSan Diego, CA 921231386618361
  14. Cynthia Sigler, M.D.San Jose, CA 951241427067917
  15. Mona Silady, M.D.San Diego, CA 921271689807992
  16. Richard Silberstein, MDSan Jose, CA 951281609971233
  17. Robert Silk, M.D.South Lake Tahoe, CA 961501497726905
  18. Bradford Silveira, MDFullerton, CA 928351528165727
  19. Patricia Silver, MDVallejo, CA 945891962574707
  20. Spencer Silverbach, MDLos Angeles, CA 900251245287846
  21. Jeffrey Silverman, M.D.Los Angeles, CA 900331386660074
  22. Norman Silverman, M.D.Burbank, CA 915041114943446
  23. Julie Sim, MDTorrance, CA 905051447293733
  24. Philip Simmons, MDWildomar, CA 925951972579829
  25. Kirk Simon, MDModesto, CA 953561699853580
  26. Robert Simon, M.D.Torrance, CA 905021740488717
  27. Stephen Simon, MDMission Viejo, CA 926911285618389
  28. Luke Simonet, M.D.Travis Afb, CA 945351457307993
  29. Christopher Simopoulos, MDSacramento, CA 958161609873066
  30. Brian Sims, MDWildomar, CA 925951730155821
  31. Melissa Sims, M.D., M.P.H.San Diego, CA 921031508064262
  32. Wilbur Sims, M.D.Rancho Cucamonga, CA 917301346228616
  33. David SinSan Diego, CA 921031225619174
  34. Jaspreet Singh, M.D.Loma Linda, CA 923541457530750
  35. Jonathan Singh, MDWalnut Creek, CA 945961861570368
  36. Kamal Singh, M.D.Los Angeles, CA 900341578698411
  37. Manu Singh, M.D.Santa Barbara, CA 931051114338753
  38. Rajinder Singh, MDFresno, CA 937201831160159
  39. Ravi Singh, M.D.Los Gatos, CA 950321528214707
  40. Rohindeep Singh, DOLos Angeles, CA 900951457988271
  41. T Singh, MDStanford, CA 943051376533133
  42. Vikash Singh, M.D.Mission Hills, CA 913451932549391
  43. Jason Sinner, M.D.Burbank, CA 915061134148703
  44. Evan Sirc, MDSanta Cruz, CA 950651003019654
  45. Cindy Sirois, M.D.Carmichael, CA 956081093791733
  46. Robert Sitarz, MDThousand Oaks, CA 913611831307677
  47. Judy Siu, M.D.San Leandro, CA 945771992748313
  48. Stanley Sizeler, M.D.Pleasant Hill, CA 945231023349719
  49. Alton Skaggs, MDSan Diego, CA 921031922506633
  50. Mitchell Sklar, M.D.Torrance, CA 905051619929122

Source: CMS NPPES, primary taxonomy 2085R0202X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 31 of 51 per resident

  1. New Jersey12
  2. Arizona12
  3. Hawaii12
  4. California12
  5. South Dakota12
  6. Indiana11
  7. 50 states and D.C.13

Source: CMS NPPES, primary taxonomy 2085R0202X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

73.7% of these records appear in a Medicare file, against 73.1% 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. California73.7%
  2. United States73.1%

Diagnostic Radiology Physician records in California, measured

  • In a Medicare file3,317 of 4,500 · 73.7% here, 73.1% nationally
  • In the CMS Doctors and Clinicians file3,130 · 69.6% here, 68.5% nationally
  • Not updated in five years or more2,695 · 59.9% here, 56.9% nationally
  • Median graduation year2004 · the 3,130 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2085R0202X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

4,500 NPPES records list diagnostic radiology physician (2085R0202X) as their primary taxonomy with a practice address in California: 12 per 100,000 residents against 13 nationally (50 states and D.C.). Los Angeles has 594 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. New York3,146
  2. Texas3,124
  3. Florida2,761
  4. Pennsylvania2,199

States with a similar rate per 100,000

  1. Hawaii11.6
  2. South Dakota11.5
  3. Arizona11.7
  4. Indiana11.4

The largest states

  1. New York3,146
  2. Texas3,124
  3. Florida2,761
  4. Pennsylvania2,199
  5. Illinois1,874

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.