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 29 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. Nerses Tchekmedyian, M.D.Irvine, CA 926181821032129
  2. Nishan Tchekmedyian, MDHuntington Beach, CA 926481235450305
  3. Matthew Tenold, MDFremont, CA 945381992199558
  4. Anna Ter-Zakarian, MDSouth Pasadena, CA 910301174085492
  5. Marilou Terpenning, M.D.Pacific Palisades, CA 902721033184890
  6. Mary Territo, MDLos Angeles, CA 900951427078039
  7. Merry Tetef, M.D.Laguna Hills, CA 926531194784785
  8. Eddie Thara, D.O.Downey, CA 902411932436821
  9. Cassandra Thomas, M.D.Ventura, CA 930031376787416
  10. Jotika Thompson, M.D.Van Nuys, CA 914051265626360
  11. John Timmerman, MDLos Angeles, CA 900951891715090
  12. Justin Wayne Tiulim, M.D.Los Angeles, CA 900331457892861
  13. Hao To, MDSacramento, CA 958171417650862
  14. Sarah Tomassetti, M.D.Torrance, CA 905021003159427
  15. Megumi Tomita, MDModesto, CA 953561740354331
  16. Wilson Tong, M.D.Antioch, CA 945311427261437
  17. Melissa Torrey, M.D.Redlands, CA 923731679792287
  18. Heather Tracy, MDSan Diego, CA 921231235101502
  19. Martha Tracy, M.D.Oakland, CA 946091174511448
  20. Chau Tran, D.O.Upland, CA 917861083813422
  21. Hung TranLos Angeles, CA 900271669779708
  22. Namphuong TranLos Angeles, CA 900241861917593
  23. Quy Tran, M.D.Mather, CA 956551437135266
  24. Henry Tsai, M.D.Rancho Mirage, CA 922701659572261
  25. James Tsai, M.D.Hemet, CA 925431437152857
  26. Steven Tsai, MDSanta Monica, CA 904041922341205
  27. Tsuong Tsai, MDCameron Park, CA 956821851462055
  28. Walter Tsang, MDHighland, CA 923461285861799
  29. Aaron Tsumura, MDSacramento, CA 958171982165213
  30. Steven Tucker, M.D.Santa Monica, CA 904041639271646
  31. Sirisha Tummala, MDSan Mateo, CA 944021851755151
  32. Kyaw Tun, MDBakersfield, CA 933011427117084
  33. Steven Turman, MDPinole, CA 945641265508642
  34. Mark Turrill, M.D.Lakeport, CA 954531568542314
  35. Joseph Tuscano, M.D.Sacramento, CA 958171487639795
  36. Dimitrios Tzachanis, M.D.La Jolla, CA 920371528026002
  37. Chimezie Ubbaonu, MDVacaville, CA 956881790004943
  38. Kalust Ucar, M.D.Glendale, CA 912041710912175
  39. An Uche, M.DOakland, CA 946021982014981
  40. Ersin Unal, MD, PHDLakewood, CA 907121578825824
  41. Carling Ursem, MDSan Francisco, CA 941431740555317
  42. Anne Uyei, MDCampbell, CA 950081083640577
  43. Davood Vafai, M.D.Rancho Mirage, CA 922701629066220
  44. Poorva VaidyaOrange, CA 928681407387566
  45. Nancy Valente, MDSan Francisco, CA 941221225743974
  46. Salimah Valliani, M.D.Fremont, CA 945381861889750
  47. Frank Valone, MDMill Valley, CA 949411447917687
  48. Michael Van Scoy-Mosher, M.D.Los Angeles, CA 900481619086568
  49. Louis Vandermolen, M.D.Newport Beach, CA 926631568540193
  50. Marian Varda, DOTorrance, CA 905021861951741

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.