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 7 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. Faisal Razzaqi, MDMadera, CA 936361780875658
  2. Patrick Reynolds, MDLos Angeles, CA 900271508958588
  3. Jaclyn Rice, LCSWSacramento, CA 958171386276954
  4. Gavin RoachLos Angeles, CA 900951669634218
  5. Elizabeth Robbins, M.D.San Francisco, CA 941431174554000
  6. William Roberts, M.D.San Diego, CA 921231245302561
  7. William Roberts, MDOrange, CA 928681790873578
  8. Nathan Robison, MDLos Angeles, CA 900271235391996
  9. Maria-Grazia Roncarolo, M.D.Stanford, CA 943051144622010
  10. Joseph Rosenthal, MDDuarte, CA 910101164526448
  11. Elyssa Rubin, M.D.Orange, CA 928681578738282
  12. Maritza Ruiz, M.D.Long Beach, CA 908061275725061
  13. Katherine Ryan, DOPalo Alto, CA 943041356729032
  14. Raya Saab, MDPalo Alto, CA 943041114666583
  15. Julie Saba, MDOakland, CA 946091942843206
  16. Sarah Sahib, MDMadera, CA 936361518487636
  17. Kathleen Sakamoto, MDPalo Alto, CA 943041437268539
  18. Vanessa Salinas-Luna, MDOrange, CA 928681952597858
  19. David Samuel, M.D.Madera, CA 936361699923581
  20. Marlene Santana, CPNPLoma Linda, CA 923501407678717
  21. Noriko Satake, MDSacramento, CA 958171942494844
  22. Bindu Sathi, M.D.Stockton, CA 952101093872483
  23. Judith Sato, MDDuarte, CA 910101407938376
  24. Mariko Sato, M.D., PH.D.Orange, CA 928681326207978
  25. Deborah Schiff, M.D.San Diego, CA 921231922179779
  26. Liora Schultz, MDPalo Alto, CA 943041982857223
  27. Elizabeth Seashore, M.D.San Francisco, CA 941431982049219
  28. Leonard Sender, MDEl Segundo, CA 902451952499741
  29. Ami Shah, MDPalo Alto, CA 943041245321595
  30. Mona Shah, MDPalo Alto, CA 943041669670253
  31. Shilpa ShahaniLos Angeles, CA 900271649594292
  32. Aditya Sharma, M.D.Loma Linda, CA 923501598059248
  33. Rajat Sharma, MBBS MDMadera, CA 936361043972763
  34. Richard Shearer, MDLos Angeles, CA 900341407915077
  35. Wei-Ping Shen, MDOrange, CA 928681598853392
  36. Danielle Shin, MDPalo Alto, CA 943041457770794
  37. Ksenya Shliakhtsitsava, M.D.San Diego, CA 921231225338718
  38. David Shook, M.D.San Francisco, CA 941431518010164
  39. David Shyr, MDPalo Alto, CA 943041407108913
  40. Melissa Siegel, MDLos Angeles, CA 900271104912039
  41. Michael Siegel, MDLos Angeles, CA 900681861512881
  42. Stuart Siegel, MDLos Angeles, CA 900271043319577
  43. Lance Sieger, M.D.Torrance, CA 905021134130248
  44. Eric Sievers, MDSan Diego, CA 921211659640944
  45. Stephen Simko, MDPalo Alto, CA 943041861539124
  46. David Simon, MDLong Beach, CA 908061780818369
  47. Sylvia Singer, MDOakland, CA 946091619031523
  48. Richard Sleightholm, MD PHDPalo Alto, CA 943041083291611
  49. David Slomiany, MDGoleta, CA 931111518934710
  50. Stephanie Smith, MDPalo Alto, CA 943041922443555

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.