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 8 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. Stephen Smith, DOLong Beach, CA 908061548796790
  2. Amit Soni, M.DOrange, CA 928681659539211
  3. Sandeep Soni, MDPalo Alto, CA 943041104807718
  4. Stephen Speicher, M.D.Los Angeles, CA 900271063863942
  5. Wayne Spruce, MDSan Diego, CA 921201780761320
  6. Sunita Sridhar, MDSan Diego, CA 921231649707365
  7. Susan Storch, MDWoodland Hills, CA 913671669520557
  8. Sarah Strandjord, M.D.Madera, CA 936381841340767
  9. Lori Styles, MDOakland, CA 946091689763716
  10. Weili Sun, M.D., PH.DLa Crescenta, CA 912141194868901
  11. Batul Suterwala, M.D.North Hollywood, CA 916061548533557
  12. Eric Sweet-Cordero, MDPalo Alto, CA 943041104919885
  13. Lydia Tam, MDSan Francisco, CA 941581467193284
  14. John Tan, MDPalo Alto, CA 943041568680023
  15. Agne Taraseviciute, M.D., PH.D.Los Angeles, CA 900271194041707
  16. Douglas Taylor, MD, PHDSacramento, CA 958171780667790
  17. Wendy Tcheng, M.D.Torrance, CA 905021508991316
  18. William TempleDublin, CA 945681487009460
  19. Courtney Thornburg, M.D.San Diego, CA 921231538222310
  20. David Tishler, MDLos Angeles, CA 900271730287400
  21. Ruetima Titapiwatanakun, M.D.Madera, CA 936361689648180
  22. Gerald Tiu, MD, PHDStanford, CA 943051073195608
  23. Emily Tomlinson, MDSan Francisco, CA 941431548898794
  24. Lilibeth Torno, MDOrange, CA 928681235227943
  25. Hung Tran, M.D.Orange, CA 928681942408562
  26. Jennifer Tsai, MDPalo Alto, CA 943041942542592
  27. Yoko Udaka, MDSan Diego, CA 921341770871105
  28. Shivani Upadhyay, M.D.Santa Barbara, CA 931111073788360
  29. Vibul Vadakan, MDLos Angeles, CA 900271366513251
  30. Russell Valle, MDSan Francisco, CA 941431801355961
  31. Jan Van Tornout, MDLos Angeles, CA 900271659468239
  32. Elliott Vichinsky, MDOakland, CA 946091932147840
  33. Judith Villablanca, MDLos Angeles, CA 900271477652584
  34. Madhav VissaOakland, CA 946091174941991
  35. Kieuhoa Vo, MDSan Francisco, CA 941431346403409
  36. Justin Wahlstrom, M.D.San Francisco, CA 941431912165358
  37. Justine Walker, M.D.San Diego, CA 921231316135635
  38. Mark Walters, MOOakland, CA 946091588753610
  39. Cassandra WangSan Diego, CA 921231265939466
  40. Victor Wang, M.D.Orange, CA 928681265776587
  41. Yunzu Wang, M.D.Duarte, CA 910101821331992
  42. Ashley Ward, M.D.San Francisco, CA 941431275859324
  43. Alan Wayne, M.D.Los Angeles, CA 900271841236171
  44. Michael Wei, M.D., PH.D.Stanford, CA 943051609062637
  45. Katja Weinacht, MDPalo Alto, CA 943041689701039
  46. Kenneth Weinberg, MDPalo Alto, CA 943041003841164
  47. Jennifer Willert, M.D.San Diego, CA 921231831260686
  48. Beth Winger, M.D., PH.D.San Francisco, CA 941431669765145
  49. Eric Won, MDSan Diego, CA 921231497192710
  50. Alan Wong, MDSanta Clara, CA 950511598818197

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.