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 12 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. Klaus Hoffmann, MDFresno, CA 937101134157910
  2. Peter Holman, MDSan Diego, CA 921031821049230
  3. Jarrod Holmes, MDSanta Rosa, CA 954031013018035
  4. Yaser Homsi, M.D.Huntington Beach, CA 926481790943983
  5. Wan-Jen Hong, M.D,Stanford, CA 943051467634436
  6. Hugo Hool, MDTorrance, CA 905051417944489
  7. Sandra Horning, M.D.Stanford, CA 943051578607669
  8. Andrew Horodner, M.D.Redondo Beach, CA 902771386849974
  9. Stephen Howell, M.D.San Diego, CA 921031114942802
  10. Frank Hsieh, MDRoseville, CA 956611164594909
  11. Shu-Chieng Hsieh, MDHarbor City, CA 907101427259308
  12. Robert Hsu, M.D.Los Angeles, CA 900891669835740
  13. Sarah Hsu, MDSan Francisco, CA 941431720583339
  14. Chung-Tsen Hsueh, M.D.Loma Linda, CA 923541386671907
  15. John Hu, M.D.Los Angeles, CA 900331649698127
  16. Li Hu, MDRoseville, CA 956611740354349
  17. Ping Hu, M.D.Monterey, CA 939401982867297
  18. Wanping Hu, MDFontana, CA 923351134296973
  19. Charity Huang, MDTorrance, CA 905021891157657
  20. Daniel Huang, M.D.Santa Ana, CA 927051154427920
  21. Sam Huang, M.D.Orange, CA 928681841248812
  22. Stephen Huang, M.D.Pasadena, CA 911051124089685
  23. William Huang, MDTravis Afb, CA 945351821177569
  24. Zuo Ming Huang, MDWalnut Creek, CA 945961255308086
  25. Everard Hughes, MDRidgecrest, CA 935551225033152
  26. Gavin Hui, MDAlhambra, CA 918011083175327
  27. Lai Hui, MDSacramento, CA 958251508944216
  28. Jamie Hung, D.O.Grass Valley, CA 959451629213194
  29. Shaun Hung, MDSanta Clara, CA 950511053498915
  30. Kendra Hutchinson, M.D.Sacramento, CA 958171922172527
  31. Edward Huynh, MDSan Diego, CA 921231770501769
  32. Julie Huynh, MDWestlake Village, CA 913611619286101
  33. Minh Huynh, M.D.Los Alamitos, CA 907201023093838
  34. Richard Huynh, M.D.Solvang, CA 934631629369442
  35. Thu-Tam Huynh, MDAnaheim, CA 928071144402348
  36. Tridu Huynh, MDSan Francisco, CA 941431174012199
  37. Andrew Hwang, MDTorrance, CA 905021154858694
  38. Dina Ibrahim, M.DFresno, CA 937101780625376
  39. Emad Ibrahim, MDRedlands, CA 923731598706129
  40. Mary Ichiuji, MDLos Angeles, CA 900341912074824
  41. Omer Ilyas, M.D.Clovis, CA 936111922341890
  42. Soo Im, MDLos Angeles, CA 900271962543397
  43. Eric Imoto, D.O.San Jose, CA 951191396056438
  44. Gino In, MDLos Angeles, CA 900891912227273
  45. Grace Inouye, MDFresno, CA 937201487728085
  46. David Irwin, M.D.Berkeley, CA 947041780672048
  47. William Isacoff, M.D.Santa Monica, CA 904031891773123
  48. Ignacio Iturbe, M.D.Chula Vista, CA 919111972513695
  49. Maria Pilar Ivanov, MDSan Jose, CA 951191700930468
  50. Laxmi Iyer, M.D.,Riverside, CA 925011508185406

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.