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 22 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. William Raffo, M.D.Santa Cruz, CA 950621659356137
  2. Parthassarathy Raguram, MD,MRCPI,FASNRoseville, CA 956611629056460
  3. Alfred Rahban, M.D.A MEDICAL CORPORLos Angeles, CA 900361003924168
  4. Sina Rahimi, DOSan Diego, CA 921231770056772
  5. Mahfuzur Rahman, MDNorthridge, CA 913241447470554
  6. Sheila Raj, MDPanorama City, CA 914021083762033
  7. Roshan Rajani, MDLos Angeles, CA 900331336494145
  8. Suma Raju, M.D.Los Angeles, CA 900331710177670
  9. M Rajudin, MDAnaheim, CA 928041790892230
  10. Pankaj Ram, MDFresno, CA 937201679539837
  11. Deepa Ramaswamy, MDSan Jose, CA 951191427134931
  12. Mubasher Rana, MDSan Leandro, CA 945771528146602
  13. Shaunak Rana, M.D.San Diego, CA 921091205046182
  14. Shraddha Rana, M.DSanta Cruz, CA 950621538459961
  15. Vineetha Rangarajan, DOCastro Valley, CA 945461295363752
  16. Reena Ranpuria, MDSan Jose, CA 951161518173608
  17. Scott Rasgon, MDLos Angeles, CA 900271720159619
  18. Anjay Rastogi, MDLos Angeles, CA 900951003836602
  19. Darryl Raszl, M.D.San Francisco, CA 941271619098845
  20. Vijay Rathore, MDSacramento, CA 958231922186667
  21. Rungwasee RattanavichLoma Linda, CA 923541316292931
  22. Katherine Rausa, M.D.South San Francisco, CA 940801235212044
  23. Mehul Raval, MDStockton, CA 952101710157474
  24. Leena Ray, MDConcord, CA 945201679574693
  25. Aamir Raza, M.D.San Bernardino, CA 924081578710158
  26. Chitra Reddy, MDHayward, CA 945451073691846
  27. Sridhar Reddy, M.D.Garden Grove, CA 928431780835447
  28. Uttam Reddy, M.D.Orange, CA 928681487846481
  29. Sol Reisin, MDEl Centro, CA 922431700844222
  30. Robert Reiss, M.D.Encinitas, CA 920241609876341
  31. Sharon Reuben, MDIndio, CA 922011013337278
  32. Barbara Rever, MDSalinas, CA 939011255410262
  33. Connie Rhee, M.D.Santa Monica, CA 904041083835276
  34. James Rice, MDLa Jolla, CA 920371689733172
  35. Rufus Richards, M.D.Los Gatos, CA 950321972873727
  36. Caitlin Richardson-Royer, M.D.Vallejo, CA 945891922351881
  37. Denise Ricker, MDBerkeley, CA 947051427155118
  38. Dena Rifkin, M.D.La Jolla, CA 920931578519203
  39. Rahul Rishi, M.D.Castro Valley, CA 945461740243930
  40. Abid Rizvi, M.D.San Dimas, CA 917731255582540
  41. Amna Rizvi, M.D.San Dimas, CA 917731841483609
  42. Rachel Roan, MDWildomar, CA 925951003496894
  43. John Robertson, M.D.Riverside, CA 925051528019536
  44. Vito Rocco, M.D.Los Angeles, CA 900241386636074
  45. Rodrigo Rocha, M.D.Lynwood, CA 902621801847157
  46. Hector Rodriguez, M.D.,Los Angeles, CA 900351770554669
  47. Juan Rodriguez, M.D.Merced, CA 953401083031033
  48. Maritina Rodriguez, M.D.Santa Cruz, CA 950651063504447
  49. Graham Rodwell, MDPalo Alto, CA 943011922077890
  50. Mark Romoff, M.D.Van Nuys, CA 914051578543179

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.