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 6 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. Eric Cheung, D.O.Lakewood, CA 908051881872687
  2. Helen Chew, M.D.Sacramento, CA 958171801870142
  3. Terrence Chew, MDPalm Springs, CA 922621093468803
  4. Dorcas Chi, M.D.Alhambra, CA 918011922040609
  5. Sudhathi Chichili, M.D.Concord, CA 945201730394891
  6. Ikechukwu ChidobemStockton, CA 952091790313260
  7. Suguna Chirla, M.DCastro Valley, CA 945461124105176
  8. VI Chiu, M.D., PH.D.Los Angeles, CA 900251992725865
  9. Rowan Chlebowski, M.D., PHDTorrance, CA 905021902876386
  10. Bartosz Chmielowski, MD, PHDLos Angeles, CA 900951801067897
  11. Eunpi Cho, M.D.Sunnyvale, CA 940861326223256
  12. May Cho, M.DOrange, CA 928681619263514
  13. Michael Cho, MDLos Angeles, CA 900341487970950
  14. Cheryl Cho-Phan, MDStanford, CA 943051508877929
  15. Jennifer Choate, MDSoquel, CA 950731326073354
  16. April Choi, MDOrange, CA 928681154825800
  17. David Choi, MDAnaheim, CA 928071760559629
  18. Jiyon Choi, MDAntioch, CA 945311144437567
  19. Michael Choi, M.D.San Diego, CA 921031912181173
  20. Sharon ChoiLa Jolla, CA 920931790277754
  21. Charng Chong, M.D.Anaheim, CA 928011922036052
  22. Jia-Ling Chou, MDWoodland Hills, CA 913671598824179
  23. Aditi Choudhry, M.D.Walnut Creek, CA 945981427218908
  24. Helen Chow, M.D.Sacramento, CA 958171326324575
  25. Lydia Chow, M.D.West Covina, CA 917901770087314
  26. Warren Chow, MDOrange, CA 928681093822017
  27. Scott Christensen, M.D.Sacramento, CA 958171316923899
  28. Grigorios Chrysofakis, MDSacramento, CA 958161700159118
  29. Gilbert Chu, MDStanford, CA 943051417083684
  30. William Chua, M.D.Montebello, CA 906401639199656
  31. Fukai Chuang, M.D.Los Angeles, CA 900951295985778
  32. Jeremy Chuang, MDWhittier, CA 906021902269541
  33. Patrick Chun, M.D.Los Angeles, CA 900951992920581
  34. Michael Chung, M.D.Torrance, CA 905051053574608
  35. Samuel Chung, M.D.South Pasadena, CA 910301609057157
  36. Soo Chung, M.D.Downey, CA 902411245293729
  37. John Chute, M.D.West Hollywood, CA 900481164505319
  38. Mary Cianfrocca, DODuarte, CA 910101821050550
  39. Stefan Ciurea, MDOrange, CA 928681710149752
  40. Bruce Clark, MDVallejo, CA 945891083793871
  41. Jincy Clement, M.D.Turlock, CA 953821447484225
  42. Joseph ClevelandSan Luis Obispo, CA 934011992209381
  43. James Coggan, D.O.San Diego, CA 921231508246042
  44. Ezra Cohen, MDSan Diego, CA 921031518029065
  45. Katherine Cohen, FNP-CSanta Clarita, CA 913551043753650
  46. Robert Cohen, MDSan Mateo, CA 944021073034765
  47. Helen Collins, M.D.Santa Rosa, CA 954051326060617
  48. Paul Coluzzi, M.D.Orange, CA 928681972563906
  49. Catherine Coombs, M.D.Orange, CA 928681417273517
  50. Patricia Cornett, M.D.San Francisco, CA 941211750315172

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.