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 68 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. Marsha Roberts, M.D.Walnut Creek, CA 945981285661090
  2. Jon Robins, M.D.San Diego, CA 921031619920006
  3. Adam Robinson, MDSan Diego, CA 921031730685611
  4. Joseph Robinson, M.D.Los Angeles, CA 900481922233055
  5. Dayle Robson, MDLos Angeles, CA 900481134255565
  6. Margo Roca, MDEl Segundo, CA 902451114973542
  7. Mark Rockoff, M.D.Tarzana, CA 913561679513857
  8. Steven Rockoff, M.D.Santa Rosa, CA 954031336481886
  9. Val Rockwell, MDSan Diego, CA 921301336180751
  10. Joseph Roco, D.O.Rancho Mirage, CA 922701720039753
  11. Edwin Rodgers, M.D.Encino, CA 914361043280878
  12. David Rodibaugh, M.D.Santa Ana, CA 927051083656508
  13. Douglas Rodriguez, MDEl Segundo, CA 902451124087515
  14. Hector Rodriguez, M.D.Santa Barbara, CA 931051235138785
  15. Juan Rodriguez, MDSalinas, CA 939011942235254
  16. Maria Rodriguez, M.D.Los Angeles, CA 900571578620498
  17. Gregory Rogalski, M.D.Sacramento, CA 958161699704742
  18. Grant Rogero, MDLodi, CA 952401154330389
  19. Douglas Rogers, M.D.Loma Linda, CA 923541669819447
  20. Bonna Rogers-Neufeld, M.D.Clovis, CA 936111437155496
  21. Albert Roh, MDStanford, CA 943051285997247
  22. Frederick Rohlfing, M.D.San Diego, CA 921341528593191
  23. James Rohn, MDSonora, CA 553701225013204
  24. Kerry Rold, M.D.Redlands, CA 923731043267156
  25. Sergei Romanov, M.D.Sacramento, CA 958171629500210
  26. Glenda Romero-Urquhart, M.D.Santa Ana, CA 927051508801499
  27. Lorene Romine, M.D.San Diego, CA 921031720209786
  28. Eyal Ron, M.D.Oak Park, CA 913771386865988
  29. Amir Ronaghi, M.D.Laguna Beach, CA 926511548258239
  30. Anthony Ronco, MDVallejo, CA 945891861926305
  31. Eugene Roos, DOBakersfield, CA 933061467444380
  32. Wesley Root, MDArcata, CA 955211508829680
  33. Gary Roper, M.D.Santa Rosa, CA 954031043531643
  34. Judith Rose, MDLos Angeles, CA 900251982645131
  35. Eric Rosen, M.D.Stanford, CA 943051487730131
  36. Ivan Rosen, M.D.West Covina, CA 917901588687255
  37. Joshua Rosenbaum, MDSan Diego, CA 921301396087425
  38. Joshua Rosengarten, MDLos Angeles, CA 900251467077255
  39. Carl Rosenquist, M.D.Sacramento, CA 958171093752305
  40. Elan Rosenthal, MDLos Angeles, CA 900951265673511
  41. Jeffrey Rosenthal, MDLos Angeles, CA 900951598418097
  42. Barbra Ross, MDBelvedere, CA 949201518982560
  43. Richard Rossin, M.D.San Diego, CA 921311518942861
  44. Samuel Rotenberg, MDHuntington Park, CA 902551639145600
  45. Antoinette Roth, M.D.La Jolla, CA 920371801812441
  46. Gerald Roth, MDSanta Monica, CA 904031740227594
  47. Tomer Roth, MDLa Jolla, CA 920371528210416
  48. Barry Rothman, M.D.Northridge, CA 913251396701629
  49. Peter Rothschild, M.D.Aptos, CA 950031659375475
  50. Jeffrey Rothstein, MDLos Angeles, CA 900251265455026

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.