NPPES file of Aug 9, 2026

Pediatric Hematology & Oncology Physician in California

417 NPPES records list pediatric hematology & oncology physician with a practice address in California, 1.1 per 100,000 residents, the 17th highest rate of 50. Los Angeles and Palo Alto have the most; each record links to the provider's NPI and the California license search. Page 9 of 9.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2080P0207X · 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, 89

  1. Los Angeles89
  2. Palo Alto81
  3. San Francisco53
  4. San Diego41
  5. Oakland25

Pediatric Hematology & Oncology Physician records in California

  1. Victor Wong, M.D.San Diego, CA 921231154692473
  2. Wendy Wong, MDPalo Alto, CA 943041225173099
  3. Wing-Yen Wong, MDLos Angeles, CA 900271760589717
  4. Joseph Woodard, MDThousand Oaks, CA 913201790788347
  5. Kynna WrightLos Angeles, CA 900271275790131
  6. Natalie Wu, M.D.San Francisco, CA 941431306287172
  7. Peng Wu, MDPalo Alto, CA 943041902149271
  8. Yung Yim, MDSacramento, CA 958191083701007
  9. Janet Yoon, M.D.Duarte, CA 910101518166966
  10. Guy Young, M.D.Los Angeles, CA 900271629175195
  11. Alice Yu, M.D., PHD.San Diego, CA 921031801919725
  12. Helena Yu, MDSan Diego, CA 921231881127736
  13. Jennifer Yu, M.D.San Diego, CA 921231326315599
  14. Peter Zage, M.D.San Diego, CA 921231912003161
  15. Re Zaw, M.DMadera, CA 936361326342593
  16. Nancy Zepf, MDSacramento, CA 958251013798156
  17. Toska ZomorodianLos Angeles, CA 900271578746889

Source: CMS NPPES, primary taxonomy 2080P0207X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 17 of 50 per resident

  1. Indiana1.2
  2. Wisconsin1.1
  3. Vermont1.1
  4. California1.1
  5. Texas1.0
  6. Connecticut1.0
  7. 50 states and D.C.1.1

Source: CMS NPPES, primary taxonomy 2080P0207X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

52.8% of these records appear in a Medicare file, against 50.9% 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. California52.8%
  2. United States50.9%

Pediatric Hematology & Oncology Physician records in California, measured

  • In a Medicare file220 of 417 · 52.8% here, 50.9% nationally
  • In the CMS Doctors and Clinicians file120 · 28.8% here, 31.2% nationally
  • Not updated in five years or more243 · 58.3% here, 54.5% nationally
  • Median graduation year2004 · the 120 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2080P0207X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

417 NPPES records list pediatric hematology & oncology physician (2080P0207X) as their primary taxonomy with a practice address in California: 1.1 per 100,000 residents against 1.1 nationally (50 states and D.C.). Los Angeles has 89 of them (21%).

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. Texas319
  2. New York289
  3. Pennsylvania218
  4. Massachusetts197

States with a similar rate per 100,000

  1. Connecticut1.0
  2. Michigan1.0
  3. Wisconsin1.1
  4. Maine1.0

The largest states

  1. Texas319
  2. New York289
  3. Pennsylvania218
  4. Massachusetts197
  5. Ohio191

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.