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 28 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. Lucy Song, M.D.Santa Clara, CA 950511699771030
  2. Colin Spears, M.D.Sacramento, CA 958641023084720
  3. Kellie Spector, MDOrange, CA 928681700374469
  4. Cory Spencer, MDEureka, CA 955011578669149
  5. Piyush Srivastava, MDMarina Del Rey, CA 902921083899132
  6. Benjamin Stafford, M.D.Arcadia, CA 910071063502318
  7. Laura Stampleman, M.DMonterey, CA 939401528065810
  8. Thomas Stanton, M.D.Petaluma, CA 949541699855445
  9. Andrea Stebel, M.D.Newport Beach, CA 926631447258389
  10. Merin Stephen, M.D.Sacramento, CA 958171295998235
  11. Danielle Sterrenberg, M.D.Los Angeles, CA 900891023243748
  12. Dustin Stevenson, D.O.Santa Maria, CA 934541962610279
  13. Tyler Stewart, M.D.San Diego, CA 921031699110676
  14. Constance Stoehr, M.D.Clovis, CA 936111851579635
  15. Sidney Stoll, D.O.Los Angeles, CA 900361770840167
  16. Stacey Stubblefield, M. D.Roseville, CA 956611053758599
  17. Andy Su, MDValencia, CA 913551417168584
  18. Rupa Subramanian, M.D.Vista, CA 920811376547174
  19. Nimit Sudan, M.D.Encino, CA 914361437199924
  20. Jennifer Suga, M.D.Vallejo, CA 945891972710119
  21. Vijay Suhag, M.D.Auburn, CA 956021063682433
  22. Jessica Sullivan, D.O.La Jolla, CA 920931942407150
  23. David Sun, M.D.Sacramento, CA 958171972874931
  24. Jason Sun, M.D.Redwood City, CA 940631790906188
  25. Shankar Sundaram, M.D.San Diego, CA 921231306959358
  26. Usha Sunkara, M.D,Castro Valley, CA 945461346267028
  27. Diana Superfin, M.D.Walnut Creek, CA 945981750365953
  28. Uma Suryadevara, MDBerkeley, CA 947041750487385
  29. Lisbeth Suyehira, MDWalnut Creek, CA 945961023196110
  30. Tiffany Svahn, M.D.Pleasant Hill, CA 945231518920479
  31. Grant Swanson, M.D.Monterey, CA 939401477965861
  32. Vajeeha Tabassum, M.DFresno, CA 937011699951582
  33. Amir Tabatabai, M.D.Los Gatos, CA 950321871592154
  34. Nadeem TabbaraSan Diego, CA 921031063972123
  35. Julie Taguchi, M.D.Santa Barbara, CA 931051073615118
  36. Nayha Tahir, MDSan Francisco, CA 941151649733007
  37. Draupadi Talreja, M.D.Northridge, CA 913251326073743
  38. Neel Talwar, MDUpland, CA 917861477977114
  39. Eric Tam, MDLos Angeles, CA 900891053739805
  40. Kit Tam, M.D., M.H.S.Sacramento, CA 958171972732014
  41. Tingting Tan, M.D. PH.D.Newport Beach, CA 926601669627238
  42. Kouichi Tanaka, M.D.Torrance, CA 905021174677637
  43. Michael Tanaka, M.D.Sacramento, CA 958171205819471
  44. Tiffany Tanaka, M.D.San Diego, CA 921031407159726
  45. Ronald Tang, DOPasadena, CA 911051609022383
  46. Sujie Tang, M.D.Sherman Oaks, CA 914031134302409
  47. Tianyi Tang, M.D., PH.D.Walnut Creek, CA 945981902285760
  48. Derrick Tao, MDSan Francisco, CA 941151881190254
  49. Vineeth Tatineni, M.D.Santa Rosa, CA 954031881127926
  50. Jahan Tavakoli, M.D.San Francisco, CA 941151942214887

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.