NPPES file of Aug 9, 2026

Nephrology Physician in California

1,468 NPPES records list nephrology physician with a practice address in California, 3.8 per 100,000 residents, the 22nd highest rate of 51. Los Angeles and San Diego have the most; each record links to the provider's NPI and the California license search. Page 25 of 30.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RN0300X · method

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

Los Angeles has the most, 151

  1. Los Angeles151
  2. San Diego75
  3. San Francisco70
  4. Sacramento57
  5. Stanford39

Nephrology Physician records in California

  1. Rukhsana Siddiqi, MDBellflower, CA 907061982771838
  2. Mohammed Siddiqui, MDMadera, CA 936371184916983
  3. Harpreet Sidhu, M.D.Torrance, CA 905051265827232
  4. Rohanjit Sidhu, M.D.Stockton, CA 952041417370958
  5. Shivjitinder Sidhu, M.D.Stockton, CA 952041841549607
  6. Jerald Sigala, M.D.Newport Beach, CA 926631073605473
  7. John Sim, MDLos Angeles, CA 900271255490868
  8. Michael Sim, M.D.Sacramento, CA 958231811972771
  9. Balbir Singh, M.D.Van Nuys, CA 914051114013927
  10. Gurbir Singh, MDSanta Cruz, CA 950651760861322
  11. Harbans Singh, M.D.Apple Valley, CA 923071770674608
  12. Harmanjit Singh, MDTorrance, CA 905021255524799
  13. Jagjit Singh, MDStockton, CA 952041801884929
  14. Jasjit Singh, M.D.Fresno, CA 937201366744021
  15. Karandeep Singh, M.D.San Diego, CA 921031699927244
  16. Mandeep Singh, M.D.Fresno, CA 937201023039690
  17. Prabhleen Singh, M.D.San Diego, CA 921031235207234
  18. Rohini Singh, D.OLa Palma, CA 906231649487620
  19. Sapna Singh, MDSan Bernardino, CA 924041417585605
  20. Sumeet Singh, PA-CVan Nuys, CA 914051972332138
  21. Willy Singh, D.O.Whittier, CA 906021265587075
  22. Erik Sitker, MDBurbank, CA 915021205931722
  23. Subramanian Sivarajan, M.D.Palo Alto, CA 943011154310951
  24. Carmen Slavov, MDMission Hills, CA 913451043205909
  25. Karen Vossen Smirnakis, M.D.Thousand Oaks, CA 913201780783530
  26. Miroslaw Smogorzewski, M.D.Los Angeles, CA 900331205862711
  27. Peter Sohn, M.D.Garden Grove, CA 928431225579675
  28. Zhabiz Solhjou, M.D.La Jolla, CA 920371679927909
  29. Michael Soliman, MDArcadia, CA 910071386629731
  30. Ricardo Soltero, M.D.Chula Vista, CA 919101841295482
  31. Salah Sonbol, M.D.Thousand Oaks, CA 913601922008119
  32. Mark Song, MD, PHDLos Angeles, CA 900201326068560
  33. Divya Sood, MDLoma Linda, CA 923541508429655
  34. Puneet Sood, MBBSSan Francisco, CA 941431194870485
  35. Mitra Sorooshian, M.D.Mountain View, CA 940401902912132
  36. Jerry Soung, M.D.Stockton, CA 952041154318764
  37. Lian Soung, M.D.Stockton, CA 952041174510747
  38. Gregory Spin, D.O.Roseville, CA 956611114977386
  39. Addy Squarer, MDSan Jose, CA 951281679581425
  40. Monica Srivastava, MDRoseville, CA 956611740306091
  41. Dylan Steer, M.D.La Jolla, CA 920371437154978
  42. Steven Steinberg, M.D.San Diego, CA 921231407852783
  43. Robert Steiner, M.D.San Diego, CA 921031811043607
  44. Frank Stella, M.D.La Mesa, CA 919421225033764
  45. Jeffrey Stewart, MDSacramento, CA 958251205988003
  46. Kevin Stiles, MDBakersfield, CA 933011013076603
  47. Gary Stone, M.D.Palm Desert, CA 922111992986061
  48. Franklin Strauss, M.D.Los Angeles, CA 900481619080827
  49. Steve Su, MDFresno, CA 937201033187133
  50. Nivetha Subramanian, MDStanford, CA 943051295295558

Source: CMS NPPES, primary taxonomy 207RN0300X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 22 of 51 per resident

  1. Texas3.8
  2. Virginia3.8
  3. Georgia3.8
  4. California3.8
  5. South Carolina3.8
  6. Michigan3.7
  7. 50 states and D.C.4.0

Source: CMS NPPES, primary taxonomy 207RN0300X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

88.2% of these records appear in a Medicare file, against 85.8% 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. California88.2%
  2. United States85.8%

Nephrology Physician records in California, measured

  • In a Medicare file1,295 of 1,468 · 88.2% here, 85.8% nationally
  • In the CMS Doctors and Clinicians file1,128 · 76.8% here, 76.0% nationally
  • Not updated in five years or more909 · 61.9% here, 54.9% nationally
  • Median graduation year2001 · the 1,128 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RN0300X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

1,468 NPPES records list nephrology physician (207RN0300X) as their primary taxonomy with a practice address in California: 3.8 per 100,000 residents against 4 nationally (50 states and D.C.). Los Angeles has 151 of them (10%).

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. Texas1,159
  2. New York1,049
  3. Florida840
  4. Pennsylvania651

States with a similar rate per 100,000

  1. South Carolina3.8
  2. Georgia3.8
  3. Virginia3.8
  4. Michigan3.7

The largest states

  1. Texas1,159
  2. New York1,049
  3. Florida840
  4. Pennsylvania651
  5. Illinois572

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.