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 94 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. Sofanit ShiferawWest Hollywood, CA 900481679380562
  2. Michael Shiffman, PH.D.Encino, CA 914361134556947
  3. John Shin, M.D.San Rafael, CA 949011114920477
  4. Joanne Shinozaki, D.V.M.Thousand Oaks, CA 913601992243356
  5. Lynn Shipman, M.D.Poway, CA 920641770582306
  6. Cecilia Shipps, PTFairfield, CA 945331639596570
  7. Salwa ShmouelModesto, CA 953541053163881
  8. Joelle Shoemaker, PHYSICAL THERAPISTRancho Santa Margarita, CA 926881578526125
  9. Amir Shokrae, M.D.Orange, CA 928681306934112
  10. Allan Shook, M.D.Northridge, CA 913251053387886
  11. Thomas Shook, M.D.Los Angeles, CA 900171104810050
  12. Michael ShortSan Diego, CA 921101134354889
  13. Mark Shotwell, CATCOakland, CA 946091205964467
  14. Mary Shrimpton, RNFAVallejo, CA 945911487655841
  15. Emily ShuffieldAlta, CA 957011285888230
  16. Robert Shumway, M.D.La Jolla, CA 920371720117856
  17. Mary Shwayder, MDTorrance, CA 905031902844566
  18. Michael Shwayder, M.D.Los Angeles, CA 900451598783185
  19. Christine SiadorSan Francisco, CA 941021124449848
  20. Kayla Sibbaluca, ATCPetaluma, CA 949521710338744
  21. Sandra SicamBaldwin Park, CA 917061164627477
  22. Shahid Siddiqui, MDSan Jose, CA 951161922005636
  23. Amarpaul Sidhu, M.DGlendora, CA 917401396713822
  24. Manpal SidhuFresno, CA 937271164240875
  25. Payal SidhuSacramento, CA 958171770198590
  26. Steven Siegal, M.D.Fairfield, CA 945331871598573
  27. Edward Siegel, M.D.Solana Beach, CA 920751134181597
  28. Jack SiegelLos Gatos, CA 950301710919097
  29. Aaron SiegmanSacramento, CA 958141306703582
  30. Greta SiegristSan Jose, CA 951261245948637
  31. Frank SierraSacramento, CA 958171588550818
  32. Greg SierraNorwalk, CA 906501841442084
  33. Varsha Sikka, MDSan Francisco, CA 941091174697114
  34. Ronda SilasNorwalk, CA 906501386786085
  35. Olivia Silbar, RNVan Nuys, CA 914051730355561
  36. Steven Silbart, M.D.Los Angeles, CA 900241972728897
  37. Naomi Silber, MDSanta Cruz, CA 950641134133176
  38. Michael Silpa, M.D.Berkeley, CA 947051679684195
  39. Enriqueta Silva, MDSanta Ana, CA 927061326313560
  40. Josslyn SilvaModesto, CA 953501154774198
  41. Morris Silver, MDBeverly Hills, CA 902101871546127
  42. Karen Silverman, LCSWAntioch, CA 945091891844841
  43. Stuart Silverman, MDBeverly Hills, CA 902111679670822
  44. Jack Silvers, M.DLos Angeles, CA 900491649214784
  45. David Silverstein, M.D.San Jose, CA 951241124065115
  46. Mark Silvert, MDSan Pablo, CA 948061265533426
  47. John Silverton, MDStockton, CA 952191750513636
  48. Susie SimNorwalk, CA 906501538310156
  49. Aisha Simjee, M.D.Newport Coast, CA 926571659335156
  50. Alexandra Simmons, B.A.Modesto, CA 953501508379348

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.