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 19 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. Sam Mazj, MDChico, CA 959261043287378
  2. Amitabha Mazumder, M.D.Downey, CA 902411881682318
  3. Nicholas McAndrew, M.D.Los Angeles, CA 900241093074106
  4. Philomena McAndrew, M.D.Beverly Hills, CA 902111104822600
  5. James McClellan, M.D., PH.D.Stanford, CA 943051477733202
  6. Eric McGary, MDLos Angeles, CA 900341851430557
  7. Michael McGrath, M.D., PHDSan Francisco, CA 941101508399155
  8. Jesse McGreivy, M.D.South San Francisco, CA 940801659657500
  9. Rosemary McIntyre, MDOxnard, CA 930301619916772
  10. William Mcintyre, Jr., M.D.Pasadena, CA 911051710925144
  11. Rana McKay, MDSan Diego, CA 921031306013610
  12. Julian McLain, MDSan Mateo, CA 944011063916591
  13. Gordon McLaren, M.D.Long Beach, CA 908221124134317
  14. Beverly McLeod, MDConcord, CA 945201851465165
  15. Jeffrey McLeroy, M.D.Sacramento, CA 958171134104946
  16. Amy McMullen, M.D.Santa Cruz, CA 950651205860954
  17. Mark McNamara, M.D.Pasadena, CA 911051275640294
  18. Monica Mead, M.D.Los Angeles, CA 900951386889418
  19. Igor Medic, M.D.La Mesa, CA 919421154618593
  20. Miguel Medina, MDPanorama City, CA 914021497803464
  21. Inderjit Mehmi, M.D.Los Angeles, CA 900251801092705
  22. Akhil Mehta, DOPleasanton, CA 945881588293708
  23. Rita Sanghvi Mehta, MDOrange, CA 928681215017470
  24. Carol Mei, M.D.Hollister, CA 950231528041720
  25. Ostap Melnyk, MDSan Leandro, CA 945781205834702
  26. Raul Mena, M.D.Burbank, CA 915051609892256
  27. Harry Menco, MDThousand Oaks, CA 913601720074099
  28. Andres Mendez-Hernandez, M.D.Stanford, CA 943051487006813
  29. Vincent Louie Mendiola, M.D.Santa Clarita, CA 913551922534866
  30. Akil Merchant, M.D.Los Angeles, CA 900481821074857
  31. Karen Mercola, MDStinson Beach, CA 949701225035884
  32. Amartej Merla, MDLancaster, CA 935341902097744
  33. Hussein Merza, MDCorona, CA 928791235409673
  34. Akram Mesleh Shayeb, M.D.La Jolla, CA 920931861784993
  35. Alex Metzger, M.D.Greenbrae, CA 949041821070590
  36. Frederick Meyers, M.D.Sacramento, CA 958171881671675
  37. Frank L MeyskensOrange, CA 928681124108386
  38. Glenn Michelson, M.D.Berkeley, CA 947101679947949
  39. Lauren Midthun, MD, DDSLos Angeles, CA 900251629365176
  40. Rufina Pamela Mae Miel, MDFountain Valley, CA 927081063470391
  41. Steven Miles, M.D.Los Angeles, CA 900481932128741
  42. Frederick Millard, M.D.San Diego, CA 921031922056373
  43. Aaron Miller, M.D., PH.D.La Jolla, CA 920931104127679
  44. Becky Miller, M.D.Los Angeles, CA 900481619050556
  45. Richard Miller, MDStanford, CA 943051114053386
  46. Ronald Miller, M.D.Palmdale, CA 935511164503926
  47. Sean Miller, M.D.Fontana, CA 923351396944674
  48. William Miller, M.D.La Jolla, CA 920371669434874
  49. Alexander Minella, M.D.Orange, CA 928681740365550
  50. George Miranda, MDMission Viejo, CA 926911558545038

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.