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 60 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. Emilia Olson, MD, PHDLong Beach, CA 908081790005494
  2. Erik Olson, MDTempleton, CA 934651295701472
  3. Linda Olson, M.D.La Jolla, CA 920371669565057
  4. Ronald Olson, M.D.San Leandro, CA 945781003850082
  5. Angelique Olszowka, MDCam Pendleton, CA 920551861484651
  6. Steven Ominsky, MDSan Francisco, CA 941431255398772
  7. Bruce Omiya, M.D.Anaheim, CA 928071336163732
  8. Michelle Omura, M.D.Riverside, CA 925031780870956
  9. Gilbert Onaka, M.D.Camarillo, CA 930101023412707
  10. Gordon Onaka, MDModesto, CA 953551801924741
  11. Andrew Ong, M.D.Los Angeles, CA 900951780138289
  12. Charlton Ong, MDLos Angeles, CA 900331902302318
  13. Eugene Ong, MDVallejo, CA 945891821176645
  14. Leonard Ong, M.D.Santa Monica, CA 904041376854281
  15. Francesca Ontell, M.D.Sacramento, CA 958171629047352
  16. Stella Onyi, D.O.Hemet, CA 925431881057750
  17. Kurt Openshaw, M.D.Orange, CA 928681881693174
  18. Benjamin Orejudos, MDNational City, CA 919501487734182
  19. Patricia Orlino, MDModesto, CA 953561881768497
  20. Amaya Ormazabal, M.D.San Diego, CA 921201801809504
  21. Philame Oronan, MDEl Centro, CA 922431740338631
  22. Frederick Orr, M.D.Colton, CA 923241295830321
  23. Thomas Orsini, M.D.San Diego, CA 921031568415727
  24. Lillian Orson, M.D.Lafayette, CA 945491376552729
  25. Orlando Ortiz, MDEl Segundo, CA 902451629012224
  26. Sylvia Ortiz, M.D.Colton, CA 923241326143462
  27. Dennis Orwig, M.D.Greenbrae, CA 949041144267097
  28. Thomas Osborne, MDPalo Alto, CA 943041053376418
  29. Walter Osias, M.D.Los Angeles, CA 900251841576097
  30. Todd Osinski, M.D.Redwood City, CA 940631114973518
  31. Jose Ospina, MD, PHDGlendale, CA 912061033373287
  32. Romy Ott, MDOakland, CA 946111205078557
  33. Ronald Otto, MDRiverside, CA 925011710988647
  34. Zareh Ounjian, MDWhittier, CA 906021104809169
  35. Raffi Ourfalian, D.O.Los Angeles, CA 900951891227559
  36. Jennifer Overstreet, M.D.Newport Beach, CA 926581043480965
  37. Benjamin OwenSacramento, CA 958171588051379
  38. Joshua Owen, MDSacramento, CA 958161194911800
  39. Gregg Owens, RADIOLOGIC TECHNOLOGLoma Linda, CA 923571578277638
  40. Judy Owens, M.D.Irvine, CA 926181366674962
  41. Harun Ozer, M.D.Lancaster, CA 935341780815886
  42. Elodie Pace-Soler, DOLos Angeles, CA 900271619462918
  43. Kenneth Pacofsky, M.D.Nipomo, CA 934441326180613
  44. Max PadgettLos Angeles, CA 900951679984736
  45. Jennifer Padwal, MDStanford, CA 943051366901241
  46. Ricardo Paez, MDLos Angeles, CA 900951952983355
  47. Anokh Pahwa, MDLos Angeles, CA 900951689840944
  48. Jason Pai, M.D.San Mateo, CA 944011548648827
  49. Rajiv Pai, M.D.Northridge, CA 913251760640742
  50. Sarina Pai, D.OLos Angeles, CA 900951417178153

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.