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 95 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. Maeina SimmonsSherman Oaks, CA 914011487779724
  2. Mason SimmonsSan Jose, CA 951261487353041
  3. Patricia Simmons, FNPTurlock, CA 953821033844857
  4. Gerald Simon, M.D.Sacramento, CA 958161215014345
  5. Neil Simon, M.B.B.S.San Francisco, CA 941431336494731
  6. Peter Simonian, M.D.Fresno, CA 937101679571624
  7. Karina SimonovaSan Francisco, CA 941031184089880
  8. John SimonsSan Francisco, CA 941031700074119
  9. Jordan SimontacchiSanta Rosa, CA 954071538913777
  10. Alexander Simopoulos, M.D.Los Angeles, CA 900691801002969
  11. Donald Simpson, M.D., PH.D.Northridge, CA 913251699053397
  12. Sharon SimpsonOakland, CA 946051679624472
  13. Edward Sims, M.D.Lynwood, CA 902621225174097
  14. Tammy Sims, M. D.Riverside, CA 925011043490246
  15. Torie SimsSan Francisco, CA 941031881206944
  16. Nancy Sin, B.A.Modesto, CA 953501417309493
  17. Adam Singer, M.D.Burbank, CA 915051578673992
  18. Harpreet Singh, MDFountain Valley, CA 927081295914216
  19. Kanwal Singh, M.D.Madera, CA 936371184668097
  20. Kanwar SinghSan Francisco, CA 941031538355052
  21. Navneet SinghSacramento, CA 958171679389779
  22. Pradeep Singh, M.D.Lancaster, CA 935341891737656
  23. Pritam Singh, M.D.Escondido, CA 920251285653543
  24. Rajinder Singh, M.D.Santa Cruz, CA 950651518007889
  25. Robin Singh, MTDaly City, CA 940141013245034
  26. Tracy Singh, MEDICAL ASSISTANTFairfield, CA 945331285850529
  27. Vikram Singh, M.DVan Nuys, CA 914051306904727
  28. Ronald SingletarySan Francisco, CA 941031467971002
  29. Anne Sinha, OTR/L, MOTSunnyvale, CA 940871235307059
  30. Erin Sinnott, MPTGrover Beach, CA 934331659588119
  31. Sabrina SiordiaSan Francisco, CA 941101548752702
  32. Will SipilaSan Francisco, CA 941041386915403
  33. Domenick Sisto, M.D.Sherman Oaks, CA 914031568427029
  34. Marna Skaar, M.D.San Mateo, CA 944011184711988
  35. Gregory Skipitis, M.D.Redding, CA 960011912021221
  36. Alicia SkuceOakland, CA 946021922211218
  37. Michael Skurja, PTCamp Pendleton, CA 920551154390888
  38. Betsy Slavik, M.A., OTR/LSan Diego, CA 921281407815087
  39. Yaser Slayyeh, M.D.San Bernardino, CA 924041932174612
  40. Breanne SlimickSan Francisco, CA 941021588085286
  41. Melissa Slivka, M.D.West Hollywood, CA 900481033122817
  42. Katherine Sljuka, M.D.Loma Linda, CA 923501962599498
  43. George Small, M.DSan Bernardino, CA 924111215022736
  44. Sanford Small, M.D.Los Angeles, CA 900451457483257
  45. Ralph Smathers, M.D.Los Gatos, CA 950321699856187
  46. Julie Smerling Kerem, PTNorth Hollywood, CA 916061801128707
  47. Veronika Smilak, MSCGCLos Angeles, CA 900661417138280
  48. Christie Smirl, NPSan Bernardino, CA 924041215295217
  49. Alissa Smith, B.A.Modesto, CA 953501073033791
  50. Allison Smith, M.P.T.Salinas, CA 939011841396496

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.