NPPES file of Aug 9, 2026

Pediatric Nephrology Physician in California

116 NPPES records list pediatric nephrology physician with a practice address in California, 0.3 per 100,000 residents, the 20th highest rate of 48. Palo Alto and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 3 of 3.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2080P0210X · method

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

Palo Alto has the most, 21

  1. Palo Alto21
  2. Los Angeles20
  3. San Diego12
  4. San Francisco9
  5. Orange8

Pediatric Nephrology Physician records in California

  1. That Nam Tran Ton, MDOrange, CA 928681366897274
  2. James Tong, MDSan Francisco, CA 941431306052667
  3. Julia Tzeng, M.D.Madera, CA 936361912106634
  4. Amanda Uber, D.O.Palo Alto, CA 943041891114799
  5. Patricia Veiga, MDOrange, CA 928681982792602
  6. Lauren Weintraub, M.D.Stanford, CA 943051801097423
  7. Patricia Weng, M.D.Los Angeles, CA 900951730301656
  8. Jessica Ashley Williams, MDPalo Alto, CA 943041114424710
  9. Erica Winnicki, M.D.Sacramento, CA 958171629207394
  10. Alexander Wolf, MDSan Francisco, CA 941431992327688
  11. Cynthia Wong, M.D.Stanford, CA 943051841214376
  12. Nianzhou Xiao, M.D.Madera, CA 936361659504959
  13. Ora Yadin, M.D.Los Angeles, CA 900951659477958
  14. Peter Yorgin, M.D.San Diego, CA 921231023039831
  15. Xixi Zhao, M.D.Palo Alto, CA 943041346621265
  16. Melissa Zhou, MDPalo Alto, CA 943041609499201

Source: CMS NPPES, primary taxonomy 2080P0210X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 20 of 48 per resident

  1. Minnesota0.3
  2. Oregon0.3
  3. South Dakota0.3
  4. California0.3
  5. Delaware0.3
  6. North Carolina0.3
  7. 50 states and D.C.0.3

Source: CMS NPPES, primary taxonomy 2080P0210X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

68.1% of these records appear in a Medicare file, against 70.9% 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. California68.1%
  2. United States70.9%

Pediatric Nephrology Physician records in California, measured

  • In a Medicare file79 of 116 · 68.1% here, 70.9% nationally
  • In the CMS Doctors and Clinicians file61 · 52.6% here, 58.9% nationally
  • Not updated in five years or more63 · 54.3% here, 53.1% nationally
  • Median graduation year2007 · the 61 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2080P0210X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

116 NPPES records list pediatric nephrology physician (2080P0210X) as their primary taxonomy with a practice address in California: 0.3 per 100,000 residents against 0.3 nationally (50 states and D.C.). Palo Alto has 21 of them (18%).

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. New York86
  2. Texas76
  3. Florida61
  4. Pennsylvania60

States with a similar rate per 100,000

  1. North Carolina0.3
  2. Tennessee0.3
  3. South Carolina0.3
  4. Indiana0.3

The largest states

  1. New York86
  2. Texas76
  3. Florida61
  4. Pennsylvania60
  5. Ohio54

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.