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 85 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. William Rivera-Ortiz, M.D.Apple Valley, CA 923071104914217
  2. Rene RiversSan Francisco, CA 941091407614506
  3. Lawrence Rivkin, M.D.Beverly Hills, CA 902101770613978
  4. H Roger Rizi, MDLong Beach, CA 908061598795775
  5. Syed Rizvi, M.D.San Dimas, CA 917731659395754
  6. David RizzoloEl Cerrito, CA 945301477976074
  7. H. Roark, M.D.La Jolla, CA 920371104989169
  8. Danielle Robbins, P.T.San Diego, CA 921241164661187
  9. Deborah RobbinsSacramento, CA 958171215865431
  10. Marilyn RobbinsSan Francisco, CA 941071043884646
  11. Joseph Roberson, M.D.E Palo Alto, CA 943031932293123
  12. Kylen RobersonSan Francisco, CA 941031508211400
  13. Audrey Roberts, P.T.Larkspur, CA 949391750344859
  14. Donald Roberts, M.S.,ATCChino, CA 917101811082456
  15. Thomas RobertsSan Francisco, CA 941161245973809
  16. Thomas Roberts, M.D.Los Gatos, CA 950321912971045
  17. James Robertson, M.D.Santa Rosa, CA 954071497706741
  18. Kevin RobertsonSan Francisco, CA 941101316673072
  19. Kkimberly RobertsonAuburn, CA 956031457489031
  20. Suzanne Robertson, RDHLa Jolla, CA 920371043748536
  21. Tanzania RobertsonSan Francisco, CA 941221154667129
  22. Ursula Robertson, H.H.PEl Cajon, CA 920201811105174
  23. Brian Robins, M.D.Palm Desert, CA 922111821368267
  24. Duane Robinson, DVMDavis, CA 956161467906222
  25. Katharyne RobinsonBerkeley, CA 947091568597144
  26. Lovina RobinsonGrass Valley, CA 959451609793751
  27. Sheena RobinsonEncinitas, CA 920241366142333
  28. Theodore RobinsonOakland, CA 946051821931593
  29. Astrid RoblesOakland, CA 946121790358042
  30. Isabella RoblesSacramento, CA 958171285478065
  31. Rhonda Robles, OTRLong Beach, CA 908051588708929
  32. Trevor RobresonSan Francisco, CA 941241831818400
  33. Haide Rocha, B.A.Modesto, CA 953501326490442
  34. Llesenia Rocha-FernandezSalinas, CA 939011326610890
  35. Jose Rocha-PerezSan Jose, CA 951101962105866
  36. Gemma RocheSan Mateo, CA 944011790256550
  37. Niall RochePleasanton, CA 945881194755918
  38. Joe Rod, M.D.San Jose, CA 951281366508160
  39. Katie Rodehorst, KATIE RODEHORSTKing City, CA 939301225211733
  40. Demond RodgersSacramento, CA 958171164238127
  41. James Rodgers, M.D.Whittier, CA 906031447335880
  42. Margaret Rodgers, M.D.Redding, CA 960011013063163
  43. Sigrid Rodoni, R.P.T.Santa Cruz, CA 950601477533354
  44. Gayoshi RodrigoEncino, CA 914361053255380
  45. Brenda RodriguezVan Nuys, CA 914011508035437
  46. Dana RodriguezSouth Pasadena, CA 910301871990945
  47. Efren Rodriguez, M.D.Anaheim, CA 928051992726434
  48. Jennie RodriguezStockton, CA 952071467270264
  49. Juan Rodriguez, M.D.Los Alamitos, CA 907201205925286
  50. Laura RodriguezYuba City, CA 959931588505796

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.