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 26 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. Madhu Sudan, MDCovina, CA 917221679674923
  2. Annie Suh, MDPanorama City, CA 914021659429488
  3. Keiichi Sumida, MD, MPH, PHDLos Angeles, CA 900951720934219
  4. Adam Sun, MDMonterey Park, CA 917541497712715
  5. Chao-Huang Sun, M.D., MPHRiverside, CA 925051134174493
  6. Susan Sun, MDRiverside, CA 925051225197973
  7. Tong Sun, MDModesto, CA 953501629161336
  8. Shalini Sundar, M.D.Fremont, CA 945381780607838
  9. Sruthi Sundaram, MDRoseville, CA 956611194352625
  10. Ashok Sunder Raj, M.D.Pasadena, CA 911051093744070
  11. Salitha Sunderrajan, MDSan Francisco, CA 941101417185919
  12. Jonathan SungTorrance, CA 905051477057859
  13. Vinay Sunku, MDLancaster, CA 935341326039405
  14. Anuradha Suri, MDFresno, CA 937201285602490
  15. Vikram Suri, MD, PHDBerkeley, CA 947051699094292
  16. Arisara Suwangomolkul, M.D.Chico, CA 959261558595496
  17. Richard Swabb, M.D.Loma Linda, CA 923541801817333
  18. Aron Swerdlin, M.D.Oxnard, CA 930361346314754
  19. John Sy, M.D.Long Beach, CA 908221639435738
  20. Shahid Syed, M.D.San Dimas, CA 917731174910848
  21. Tin-Jon Syiau, MDArcadia, CA 910061366511768
  22. Margarita Symonian Silver, M.D.Los Angeles, CA 900571528140696
  23. Lynda Anne Szczech, M.D.Berkeley, CA 947051912089079
  24. Zahra Tabassian, MDInglewood, CA 903011871521716
  25. Hossein Tabriziani, MDSan Diego, CA 921231427136332
  26. Chelsea Takamatsu, MDPalo Alto, CA 943051861013096
  27. Kristen Tamura, M.D.San Jose, CA 951161356502553
  28. Jane Tan, MDPalo Alto, CA 943041124160155
  29. Maybel Tan, M.DMontebello, CA 906401053657684
  30. Adina Tanasescu, M.D.Riverside, CA 925051366494320
  31. Nidhika Taneja, M.D.Sacramento, CA 958251104014596
  32. Nadine Tanenbaum, MDChico, CA 959731558383695
  33. Jennifer Tang, MDLos Angeles, CA 900331073019881
  34. Pooja Tanjavour, M.D.Victorville, CA 923951972919983
  35. Ekamol Tantisattamo, MDOrange, CA 928681104053024
  36. Jianling Tao, MDStanford, CA 943051750855938
  37. Maryam Tavanaei, MDNorth Hollywood, CA 916071154811271
  38. David Taylor, M.D.Sylmar, CA 913421871712513
  39. Josie Tebben, MDBerkeley, CA 947051053418749
  40. Taraneh Tehrani, M.D.Torrance, CA 905051689731648
  41. Seigmund Teichman, M.D.Loma Linda, CA 923541801813597
  42. Eric Tepper, MDSan Rafael, CA 949031790869774
  43. Ushakant Thakkar, M.D.Simi Valley, CA 930651780683193
  44. Kaleb Thomas, MDPalo Alto, CA 943011184280851
  45. Maria Joana Thomas, MDFolsom, CA 956301205241122
  46. Mohsen Thomas, MDVisalia, CA 932911225092877
  47. Theodore Thomas, M.D.San Diego, CA 921031669477113
  48. John Thompson, M.D.La Mesa, CA 919421770663890
  49. Scott Thomson, M.D.San Diego, CA 921611225052483
  50. Linh Thong, M.D.Orange, CA 928681154510386

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.