NPPES file of Aug 9, 2026

Specialist in California

5,749 NPPES records list specialist with a practice address in California, 15 per 100,000 residents, the 19th highest rate of 51. San Francisco and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 87 of 115.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 174400000X · method

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

San Francisco has the most, 666

  1. San Francisco666
  2. Los Angeles301
  3. Sacramento241
  4. San Diego207
  5. Oakland198

Specialist records in California

  1. Marian Rosenthal, M.D.Los Angeles, CA 900451568533784
  2. Mark Rosenthal, M.D.Sepulveda, CA 913431811084536
  3. Richard Rosenthal, M.D.Beverly Hills, CA 902101992912364
  4. Helene Rosenzweig, M.D.Encino, CA 914361962509646
  5. Joaquin Roses, M.D.Santa Barbara, CA 931031457334781
  6. Wayne Roslosnik, R.P.T.Eureka, CA 955011669559308
  7. Glenn Rosner, CMTPleasant Hill, CA 945231346546330
  8. Saul Rosoff, M.D.Los Angeles, CA 900671790896892
  9. Brian Ross, M.D., PHDPasadena, CA 911051104972900
  10. Jennifer Ross, M.D.San Francisco, CA 941151144232372
  11. Latesha RossIndio, CA 922011720457732
  12. Sheridan Ross, IBCLC, RLCSan Carlos, CA 940701558676759
  13. Willie Ross, M.D.Hayward, CA 945411871536342
  14. William Rosse, PSYCH ASSIST. INTERNSanta Cruz, CA 950601497952196
  15. Michael Rossini, M.D.Modesto, CA 953501922199959
  16. Ronald Rosso, M.D.Torrance, CA 905051215023411
  17. Nejat Rostami, M.D.Los Angeles, CA 900291114064987
  18. Yuliya Rostovtseva, MDFremont, CA 945381336229657
  19. Cappy Rothman, MDLos Angeles, CA 900671144376708
  20. Pia RotmanTustin, CA 927801689093312
  21. Jerome Rotter, M.D.West Hollywood, CA 900481871522136
  22. Marco Rotting, MSW/ASWAlameda, CA 945011033435193
  23. Deborah Rounsville, OTR/LSalinas, CA 939011770746158
  24. Audrey Roux, M.D.Palo Alto, CA 943041952688301
  25. Cody Rovella, L.E.San Francisco, CA 941021053096941
  26. Jeannie RowarSanta Maria, CA 934581043366560
  27. Ronald Rowberry, M.D.Sacramento, CA 958161922010941
  28. Elisha RoyModesto, CA 953541750110052
  29. Tiffany Roysden, COSMETOLOGYSherman Oaks, CA 914011275466005
  30. Ivor Royston, M.D.San Diego, CA 921211174880074
  31. Mark Rubenstein, M.D.Walnut Creek, CA 945981992876403
  32. Alan Rubin, M. D.San Francisco, CA 941021710907696
  33. Ashley Rubin, M.D.Poway, CA 920641538459870
  34. Mark Rubin, MDBeverly Hills, CA 902121356453666
  35. Jonathan Rubingh, REHSSan Francisco, CA 941021285056374
  36. Joan Rubinstein, M.D.Fowler, CA 936251184653974
  37. Toni Rucker, PH.D.San Francisco, CA 941031841487105
  38. Patricia Rudd, PTSan Francisco, CA 941431922166321
  39. Michael Rudnitsky, THERAPUTIC SHOE FITTWest Hollywood, CA 900461023251022
  40. Melody Rudolph, BS, CMT, CST, CIMISantee, CA 920711770609224
  41. Susie Rudzik, OTLaguna Hills, CA 926531316097199
  42. Anne Ruggels, 0941 MGR VISan Francisco, CA 941031811197239
  43. Ferrin Ruiz, MDMontebello, CA 906401477998870
  44. Ruben Ruiz, M.D.Rialto, CA 923761912901471
  45. Hufemia Ruiz-PerezSeaside, CA 939551275362071
  46. James Rumack, M.D.Daly City, CA 940151326076282
  47. Lieu Rupp, M.D.Riverside, CA 925011508957127
  48. Samuel Rush, M.D.Clovis, CA 936111780622324
  49. Alan Rushovich, M.D.Irvine, CA 926181629075882
  50. John Rusin, PT, DPT, CSCSLa Jolla, CA 920371568711406

Source: CMS NPPES, primary taxonomy 174400000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 19 of 51 per resident

  1. Massachusetts16
  2. West Virginia15
  3. Maryland15
  4. California15
  5. Minnesota15
  6. Delaware13
  7. 50 states and D.C.18

Source: CMS NPPES, primary taxonomy 174400000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

29.6% of these records appear in a Medicare file, against 17.0% 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. California29.6%
  2. United States17.0%

Specialist records in California, measured

  • In a Medicare file1,704 of 5,749 · 29.6% here, 17.0% nationally
  • In the CMS Doctors and Clinicians file1,076 · 18.7% here, 11.1% nationally
  • Not updated in five years or more4,403 · 76.6% here, 77.3% nationally
  • Median graduation year1989 · the 1,075 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 174400000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

5,749 NPPES records list specialist (174400000X) as their primary taxonomy with a practice address in California: 15 per 100,000 residents against 18 nationally (50 states and D.C.). San Francisco has 666 of them (12%).

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. Florida2,685
  2. Washington2,609
  3. Pennsylvania2,031
  4. Texas1,716

States with a similar rate per 100,000

  1. Minnesota14.6
  2. Maryland15.2
  3. West Virginia15.4
  4. Massachusetts15.7

The largest states

  1. New York22,636
  2. Florida2,685
  3. Washington2,609
  4. Pennsylvania2,031
  5. Texas1,716

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.