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 18 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. James Long, M.D.Vacaville, CA 956871194821868
  2. Alfredo Lopez, MDSan Francisco, CA 941151033297668
  3. Angela Lopez, M.D.Duarte, CA 910101083804306
  4. Jonathan Lopez, MDFairfield, CA 945331881682714
  5. Jeremy Lorber, MDBeverly Hills, CA 902111689940652
  6. David Lou, M.D., PH.D.Irvine, CA 926181477729861
  7. Yenmay LouTorrance, CA 905021679766042
  8. Thomas Lowe, M.D.Torrance, CA 905051801968334
  9. Nu Lu, MDValencia, CA 913551710196910
  10. Pei-Hua (peggy) Lu, M.D.San Jose, CA 951161720199623
  11. Yi-Tsung Lu, M.D.Los Angeles, CA 900331649685504
  12. George Luiken, MDSan Diego, CA 921341780656090
  13. Doris Lyonga, MDInglewood, CA 903011366530875
  14. Yung Lyou, M.D., PH.D.Fullerton, CA 928351013277342
  15. Austin Ma, MDLos Angeles, CA 900331598700627
  16. Helen Ma, M.D.Long Beach, CA 908221841600186
  17. Norma Maala Sarao, M.D.Torrance, CA 905031003927963
  18. Madeline Macdonald, MDLos Angeles, CA 900951710567086
  19. Mariela Macias, MDChula Vista, CA 919131629235072
  20. Anjlee Mahajan, M.D.Sacramento, CA 958171356578454
  21. Shirish Mahajan, MDRedding, CA 960021609808856
  22. Khosrow Mahdavi, MDCosta Mesa, CA 926271275536773
  23. Sharmeen MahmoodNewport Beach, CA 926631639603236
  24. Tariq Mahmood, M.D.Orange, CA 928681104874171
  25. Martin Majer, M.D.Oroville, CA 959661376749234
  26. Edward Maldonado, M.D.San Francisco, CA 941431679004915
  27. Jacqueline Malekirad, M.D.Laguna Hills, CA 926531972892750
  28. Akshiv Malhotra, MDBerkeley, CA 947021629381819
  29. Imtiaz Malik, M.D.Merced, CA 953481346278546
  30. Rajiv Malik, M.D.San Bernardino, CA 924041255314977
  31. Jennifer Malin, MD, PHDLos Angeles, CA 900731134300734
  32. Eliezer Manacop, MDBaldwin Park, CA 917061831247899
  33. Gilbert Mandell, M.D.Sacramento, CA 958171720166465
  34. James Mangan, MDSan Diego, CA 921031720107121
  35. Nataliya Mar, MDOrange, CA 928681922240191
  36. Michael Maranzano, M.D.Los Angeles, CA 900331114453016
  37. Omkar Marathe, MDLakewood, CA 908051982989836
  38. Philip Marjon, M.D.San Marcos, CA 920691912234121
  39. Cynthia Martel, M.D.Pasadena, CA 911051487665865
  40. Lesley Martin, M.D.Concord, CA 945201114900834
  41. Francisco Martinez, MDSan Francisco, CA 941151649769225
  42. Silvana Martino, D.O.Santa Monica, CA 904041073626362
  43. Mercedes Maruscak, N.P.Glendale, CA 912041154356699
  44. David Masiello, M.D.Los Angeles, CA 900331427277573
  45. Daniel Maslyar, MDSan Francisco, CA 941211508975459
  46. James Mason, M.D.La Jolla, CA 920371497717730
  47. Robert Mass, MDMill Valley, CA 949411386086460
  48. Aashini Master, D.OBeverly Hills, CA 902121154557387
  49. Soe Maunglay, MDRiverside, CA 925011093864373
  50. Caroline Maxwell, FNPSanta Monica, CA 904041831677145

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.