NPPES file of Aug 9, 2026

Blood Banking & Transfusion Medicine Physician in California

54 NPPES records list blood banking & transfusion medicine physician with a practice address in California, 0.1 per 100,000 residents, the 19th highest rate of 41. Los Angeles and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 1 of 2.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207ZB0001X · 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, 10

  1. Los Angeles10
  2. San Francisco6
  3. Sacramento5
  4. Duarte4
  5. San Diego4

Blood Banking & Transfusion Medicine Physician records in California

  1. Yembur Ahmad, MDLos Angeles, CA 900271669978342
  2. Ahmad Al-Sabbagh, MDCarlsbad, CA 920081598965782
  3. Elizabeth Allen, M.D.San Diego, CA 921031174814065
  4. Sarah Barnhard, MDSacramento, CA 958171598082711
  5. Michael Bonin, MDSan Diego, CA 921201003964974
  6. Shelley Chang, MDLos Angeles, CA 900891720378151
  7. Joseph Cho, MD, PHDPasadena, CA 911051679003446
  8. Yung-Kang Chow, M.D., A.M.Irvine, CA 926031205190337
  9. Mark Edmunds, M.D.West Hollywood, CA 900481073818548
  10. Edgar Engleman, M.DPalo Alto, CA 943041417156225
  11. Jonathan Esensten, M.D., PH.D.San Francisco, CA 941071285900910
  12. Eberhard Fiebig, MDSan Francisco, CA 941101629290614
  13. Joy Fridey, MDDuarte, CA 910101992801443
  14. Gary Gochman, MDBellflower, CA 907061477612125
  15. Christopher Gresens, MDMather, CA 956551508383597
  16. Chelsea Halprin, DOLos Angeles, CA 900891821596438
  17. Yongyi Han, MDDuarte, CA 910101982897138
  18. Nora Hirschler, MDSan Francisco, CA 941181316137904
  19. Paul Holland, M.D.Walnut Creek, CA 945951740770916
  20. Karine Hollis-Perry, M.D.San Diego, CA 921341518946623
  21. Yaseen Jamal, MD, PHDPalo Alto, CA 943051659049559
  22. Andrew Jones, MDOakland, CA 946091043691421
  23. Michael Kanter, MDLos Angeles, CA 900271619044518
  24. Omar KhanSan Francisco, CA 941071659020204
  25. Patricia Kopko, M.D.San Diego, CA 921031265735013
  26. Yao Ma, M.D.Los Angeles, CA 900331093132524
  27. Holli Mason, M.D.Torrance, CA 905021790820173
  28. Gagan Mathur, MD, MBAOrange, CA 928681386999175
  29. Catherine Mazzei, MDOakland, CA 946181750802013
  30. Grace Monis, MD, PHDSacramento, CA 958171003070061
  31. Ashok Nambiar, MDSan Francisco, CA 941431487619821
  32. Kim-Anh Nguyen, MD, PHDSan Francisco, CA 941181356417364
  33. Melanie Osby, M.D.Los Angeles, CA 900331154413045
  34. Judith Pachciarz, M.D.Los Angeles, CA 900591134220338
  35. Huy Pham, M.D.Los Angeles, CA 900331497998314
  36. Jesse Qiao, M.D.Orange, CA 928681225340722
  37. Rachel Rangwala, M.D.Palos Verdes Estates, CA 902741063653350
  38. Wesley Rubenstein, DOSacramento, CA 958171588153134
  39. Patrick Sadler, M.D.Fresno, CA 937221194878892
  40. Neil Shah, MDStanford, CA 943051598996464
  41. Sierra Simmons, M.D.Orange, CA 928681750726014
  42. Wesley Stevens, M.D.Loma Linda, CA 923541760591416
  43. Cindy Tay, MDLos Angeles, CA 900951285216051
  44. Joseph Thompson Jr., MDLos Angeles, CA 900271629145503
  45. David Unold, M.D.Sacramento, CA 958171851534457
  46. Kamran Urgun, M.D.Palo Alto, CA 943041811376262
  47. Maurene Viele, M.D.Stanford, CA 943051447392410
  48. Roger Williams, MDCarmel By The Sea, CA 939211982709481
  49. Jennifer Woo, MDIrvine, CA 926181265876510
  50. Willard Worthen, M.D.Inglewood, CA 903011235205253

Source: CMS NPPES, primary taxonomy 207ZB0001X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 19 of 41 per resident

  1. Pennsylvania0.1
  2. New Hampshire0.1
  3. New Mexico0.1
  4. California0.1
  5. Arkansas0.1
  6. Illinois0.1
  7. 50 states and D.C.0.1

Source: CMS NPPES, primary taxonomy 207ZB0001X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

44.4% of these records appear in a Medicare file, against 53.7% 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. California44.4%
  2. United States53.7%

Blood Banking & Transfusion Medicine Physician records in California, measured

  • In a Medicare file24 of 54 · 44.4% here, 53.7% nationally
  • In the CMS Doctors and Clinicians file21 · 38.9% here, 41.8% nationally
  • Not updated in five years or more33 · 61.1% here, 60.5% nationally
  • Median graduation year2011 · the 21 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207ZB0001X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

54 NPPES records list blood banking & transfusion medicine physician (207ZB0001X) as their primary taxonomy with a practice address in California: 0.1 per 100,000 residents against 0.1 nationally (50 states and D.C.). Los Angeles has 10 of them (19%).

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 York44
  2. Massachusetts26
  3. Minnesota22
  4. Ohio22

States with a similar rate per 100,000

  1. Pennsylvania0.1
  2. Arizona0.1
  3. Illinois0.1
  4. Michigan0.1

The largest states

  1. New York44
  2. Massachusetts26
  3. Minnesota22
  4. Ohio22
  5. Texas22

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.