NPPES file of Aug 9, 2026

Dermatology Physician in California

2,083 NPPES records list dermatology physician with a practice address in California, 5.3 per 100,000 residents, the 12th highest rate of 51. San Diego and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 32 of 42.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207N00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

San Diego has the most, 152

  1. San Diego152
  2. Los Angeles144
  3. San Francisco134
  4. Sacramento73
  5. Stanford59

Dermatology Physician records in California

  1. William Rietkerk, MD MBAThousand Oaks, CA 913611720311400
  2. Rachel Rigo, MDPalo Alto, CA 943011902399751
  3. Ronald Rigor, M.D.,Pasadena, CA 911051700835675
  4. Jessica Riley, DOSan Clemente, CA 926731548677438
  5. Elizabeth Ringrose, MDOakland, CA 946021447347877
  6. Eon Rios, MDStanford, CA 943051942526389
  7. David Rish, M.D.Beverly Hills, CA 902101225045438
  8. Julie Ritchie, M.D.San Diego, CA 921111891012969
  9. Elizabeth Rizza, MDSacramento, CA 958161467831388
  10. Heather Roberts, MDLos Angeles, CA 900641629171624
  11. Wendy Roberts, M.D.Rancho Mirage, CA 922701689663635
  12. David Robles, MD, PHDPomona, CA 917671326156233
  13. Keith Roby, MDSan Diego, CA 921031740698943
  14. Kathryn Rodan, M.D.Oakland, CA 946091851386155
  15. Harold Rodgers, MDSan Jose, CA 951281548363112
  16. Ernest Rodier, Frcpc,inc, MDPoway, CA 920641134201312
  17. Hector Rodriguez, PA-CMerced, CA 953401609666833
  18. Rana Rofagha Sajjadian, MDMission Viejo, CA 926911629043054
  19. Edward Rohaly, M.D,.Newport Beach, CA 926601669522819
  20. Nathan Rojek, M.D.Irvine, CA 926971811315583
  21. Judith Romero, MDLaguna Hills, CA 926531710073697
  22. Blair Rose, MDNewport Beach, CA 926601891113395
  23. Ingrid Roseborough, M.D.Oakland, CA 946091972636272
  24. Alan Rosenbach, M.D.Century City, CA 900671164560637
  25. Chi Rosenberg, MDWoodland Hills, CA 913671154479038
  26. Fredric Rosenberg, M.D.Lakewood, CA 907121295885630
  27. Michael Rosenblum, M.D., PH.D.San Francisco, CA 941151356521603
  28. Babak Roshdieh, M.D.Corona, CA 928791275589723
  29. Andrew Ross, M.D.Oceanside, CA 920561700140738
  30. Edward Ross, MDSan Diego, CA 921301740252493
  31. Robert Roth, MDFremont, CA 945381205807864
  32. Ruth Rothman, MDPalo Alto, CA 943011003827346
  33. Mark Ruben, M.D.Fairfield, CA 945341497742084
  34. Stephanie RubiClaremont, CA 917111295200509
  35. Gennady Rubinstein, M.D.Studio City, CA 916041720083744
  36. Jennifer Rullan, MDChula Vista, CA 919101447484811
  37. Randi Rush, DOWoodland Hills, CA 913641154480895
  38. Michael Ryan, MDFremont, CA 945381699303008
  39. Jubin Ryu, M.D.Palo Alto, CA 943011992021273
  40. Payam Saadat, MDBurbank, CA 915051740487925
  41. Bruce Saal, M.D.Los Gatos, CA 950321073612867
  42. Michael Sabat, DOLos Angeles, CA 900461205988664
  43. Divya Sachdev, MDTorrance, CA 905051316204936
  44. Suzanne Sachsman, MDStanford, CA 943051629231675
  45. Khosro Sadeghani, MDMission Hills, CA 913451750315362
  46. Parrish Sadeghi, MDSanta Monica, CA 904041275567927
  47. Lina Saeed, MDBurbank, CA 915051407315666
  48. Somharn Saekow, M.D.La Jolla, CA 920371437269990
  49. Sogol Saghari, MDIrvine, CA 926181114931763
  50. Jessica Saghian, PA-CAgoura Hills, CA 913011053122515

Source: CMS NPPES, primary taxonomy 207N00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 12 of 51 per resident

  1. Maryland5.5
  2. Wisconsin5.5
  3. Florida5.4
  4. California5.3
  5. Pennsylvania5.3
  6. Utah5.2
  7. 50 states and D.C.4.7

Source: CMS NPPES, primary taxonomy 207N00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

83.2% of these records appear in a Medicare file, against 84.6% 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. California83.2%
  2. United States84.6%

Dermatology Physician records in California, measured

  • In a Medicare file1,733 of 2,083 · 83.2% here, 84.6% nationally
  • In the CMS Doctors and Clinicians file1,450 · 69.6% here, 72.6% nationally
  • Not updated in five years or more1,207 · 57.9% here, 54.0% nationally
  • Median graduation year2006 · the 1,450 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207N00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

2,083 NPPES records list dermatology physician (207N00000X) as their primary taxonomy with a practice address in California: 5.3 per 100,000 residents against 4.7 nationally (50 states and D.C.). San Diego has 152 of them (7%).

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. Florida1,213
  2. New York1,211
  3. Texas1,172
  4. Pennsylvania681

States with a similar rate per 100,000

  1. Utah5.2
  2. Wisconsin5.5
  3. Colorado5.2
  4. Maryland5.5

The largest states

  1. Florida1,213
  2. New York1,211
  3. Texas1,172
  4. Pennsylvania681
  5. Illinois647

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.