NPPES file of Aug 9, 2026

Hematology & Oncology Physician in California

1,583 NPPES records list hematology & oncology physician with a practice address in California, 4.1 per 100,000 residents, the 19th 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 27 of 32.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RH0003X · 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, 153

  1. Los Angeles153
  2. San Diego88
  3. Sacramento77
  4. San Francisco64
  5. Orange63

Hematology & Oncology Physician records in California

  1. Gary Shi, MD, PHDJackson, CA 956421235101437
  2. David Shiba, M.D.Modesto, CA 953551255389300
  3. Kevin Shieh, MD, PHDSanta Clara, CA 950511043716244
  4. Marie Shieh, MDSan Diego, CA 921231245475474
  5. Roger Shiffman, M.D.Monterey, CA 939401033156682
  6. Sufana Shikdar, MD, MPHChico, CA 959261255780938
  7. Joomee ShimLos Angeles, CA 900891942526934
  8. Brian Shin, MDPanorama City, CA 914021942349634
  9. Daniel Shin, M.D.Los Angeles, CA 900241386902419
  10. David Shin, M.D.Porter Ranch, CA 913261811194947
  11. John Shin, M.D.Loma Linda, CA 923541992111520
  12. Arvind Shinde, M.D., M.B.A., M.P.H.West Hollywood, CA 900481205096633
  13. Mihran Shirinian, M.D.Glendale, CA 912061730262122
  14. Michael ShodiyaTorrance, CA 905051083122212
  15. Fengyu Shu, MDFontana, CA 923351598832305
  16. James Shum, MDStockton, CA 952101770661258
  17. Merrill Shum, M.D.Whittier, CA 906021982819702
  18. Nayyar Siddique, MDOceanside, CA 920561497890610
  19. Shahzad Siddique, MDCarmichael, CA 956081912171034
  20. Fareeha Siddiqui, M.D.San Diego, CA 921031104848720
  21. Mustaqeem Siddiqui, MBBSSacramento, CA 958161669480133
  22. Swati Sikaria, M.D.Redondo Beach, CA 902771497048060
  23. Branimir Sikic, MDStanford, CA 943051376679548
  24. Jordyn Silverstein, MDSan Francisco, CA 941431306473426
  25. Jillian SimardSan Francisco, CA 941171710372594
  26. Elizabeth Simmons, MDBellflower, CA 907061215008248
  27. John Simmons, MDWalnut Creek, CA 945961932287000
  28. Jonathan Simons, M.D.Santa Monica, CA 904011821105248
  29. James Sinclair, M.D.La Jolla, CA 920371356300230
  30. Adam SingerTorrance, CA 905051770014326
  31. Carl Singerman, MDNorthridge, CA 913251134128556
  32. Arun Singh, M.D.Santa Monica, CA 904041285817932
  33. Himani Singh, MDOceanside, CA 920561558546192
  34. Priya Singh, M.D.San Diego, CA 921231265502876
  35. Sukhwant Singh, MDAntioch, CA 945311285839209
  36. Vinita Singh, MDNorthridge, CA 913251679507248
  37. Zara Sipan, PA-CGlendale, CA 912041770715369
  38. Matthew Sirott, M.D.Pleasant Hill, CA 945231023014461
  39. Dennis Slamon, MDLos Angeles, CA 900951932129533
  40. Samuel Slomowitz, M.D.Los Angeles, CA 900241659525756
  41. Gregory Smith, M.D.St Helena, CA 945741265408447
  42. Julie Smith, NPOrange, CA 928681083137947
  43. Richard Smith, MDOroville, CA 959661740244979
  44. Wade Smith, M.D.Newport Beach, CA 926601730240219
  45. Michael Snell, MDLos Angeles, CA 900151215158423
  46. Francisco Socola Cuzco, M.D.Sacramento, CA 958171508153339
  47. Aye Soe, M.D.Stockton, CA 952101528304375
  48. Lin Soe, MBBS, MPH, TMSan Luis Obispo, CA 934011467524900
  49. George Somlo, MDSeal Beach, CA 907401831206861
  50. Alexander Song, MDLos Angeles, CA 900171265964795

Source: CMS NPPES, primary taxonomy 207RH0003X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 19 of 51 per resident

  1. Ohio4.4
  2. New Jersey4.3
  3. Louisiana4.1
  4. California4.1
  5. Nebraska4.0
  6. Virginia4.0
  7. 50 states and D.C.4.2

Source: CMS NPPES, primary taxonomy 207RH0003X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

83.1% of these records appear in a Medicare file, against 82.9% 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. California83.1%
  2. United States82.9%

Hematology & Oncology Physician records in California, measured

  • In a Medicare file1,315 of 1,583 · 83.1% here, 82.9% nationally
  • In the CMS Doctors and Clinicians file1,126 · 71.1% here, 71.3% nationally
  • Not updated in five years or more917 · 57.9% here, 54.3% nationally
  • Median graduation year2003 · the 1,124 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RH0003X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

1,583 NPPES records list hematology & oncology physician (207RH0003X) as their primary taxonomy with a practice address in California: 4.1 per 100,000 residents against 4.2 nationally (50 states and D.C.). Los Angeles has 153 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. New York1,163
  2. Texas922
  3. Florida818
  4. Pennsylvania784

States with a similar rate per 100,000

  1. Nebraska4.0
  2. Louisiana4.1
  3. Virginia4.0
  4. North Carolina4.0

The largest states

  1. New York1,163
  2. Texas922
  3. Florida818
  4. Pennsylvania784
  5. Illinois666

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.