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 5 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. Robert Chang, M.D.Corona, CA 928811992894885
  2. Susan Chang, MDCamarillo, CA 930101073673273
  3. Tara Chang, MDStanford, CA 943051437166592
  4. Warren Chang, MDDaly City, CA 940151083674550
  5. Yongen Chang, MD, PHDOrange, CA 928681932490034
  6. Jay Channick, M.D.Coronado, CA 921181083912869
  7. Allen ChaoPasadena, CA 911051952765034
  8. Derek Chao, M.D.Torrance, CA 905051609818863
  9. Bikash ChapagainFresno, CA 937201811319197
  10. Tricia Charles-Cowan, D.O.Hemet, CA 925451649526088
  11. Michael Chau, D.O.San Diego, CA 921201588036719
  12. Varun ChawlaFremont, CA 945381609067537
  13. Qi Che, M.D.Fremont, CA 945381447429212
  14. Debbie Chen, MDStanford, CA 943051689099715
  15. Jeffrey Chen, M.D.Monterey, CA 939401346395704
  16. Joline Chen, M.D.Long Beach, CA 908221871511931
  17. Justin Chen, MDPasadena, CA 911051447526066
  18. Kenneth Chen, MDRichmond, CA 948011205911971
  19. Lo-Ping Chen, MDSan Diego, CA 921201932258290
  20. Maggie Chen, MDSan Jose, CA 951161649470683
  21. May Chen, MDMission Viejo, CA 926911881772887
  22. Randolph Chen, MDBelmont, CA 940021962502872
  23. Shan Shan Chen, MDBakersfield, CA 933091487945507
  24. Teresa Chen, M.D.San Francisco, CA 941431336352558
  25. Yakuan Yvonne Chen, M.D.Oakland, CA 946091306959135
  26. Yiann Chen, MDOakland, CA 946111891912689
  27. Jonathan Cheng, MDLos Angeles, CA 900151538600887
  28. Xingxing Cheng, MDStanford, CA 943051558656231
  29. Sheila Cherian, MDVictorville, CA 923951992891956
  30. Glenn Chertow, MDStanford, CA 943051407823875
  31. Andrew Cheung, M.D.Corona, CA 928811164658662
  32. Eric Cheung, M.D.Santa Rosa, CA 954071497998777
  33. Stephanie Cheung, MDOrange, CA 928681417136219
  34. Sylvia Chi-Wu, MDWalnut Creek, CA 945961144308230
  35. Glenn Chiang, M.D.Newport Beach, CA 926631285697227
  36. Wen-Yuan Chiang, D.O.South Gate, CA 902801295753655
  37. Frank Chieu, M.D.Oxnard, CA 930361235203647
  38. Doris Chih, M.D., PH.D.Duarte, CA 910101477612117
  39. Seyed Farhad Chimeh, M.D.Los Angeles, CA 900341306820220
  40. Andrew Chin, MDSacramento, CA 958171649251133
  41. Chandrika Chitturi, MDBakersfield, CA 933061770991333
  42. Edwin Chiu, M.D.Napa, CA 945581659392223
  43. Josephine Chiu, MDLos Angeles, CA 900341003983982
  44. May Chiu, MDWalnut Creek, CA 945981407857329
  45. Chonlada Chivangkul, M.D.Long Beach, CA 908061184063570
  46. Charles Cho, M.D.Los Angeles, CA 900201053512566
  47. Kerry Cho, M.D.San Francisco, CA 941431861434318
  48. Paula Cho, MDFontana, CA 923351245399906
  49. Grace ChoiLos Angeles, CA 900151831585074
  50. Jeongwon Choi, M.D.San Jose, CA 951161902213820

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.