NPPES file of Aug 9, 2026

Gynecologic Oncology Physician in California

176 NPPES records list gynecologic oncology physician with a practice address in California, 0.5 per 100,000 residents, the 34th highest rate of 50. Sacramento and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 4 of 4.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207VX0201X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Sacramento has the most, 22

  1. Sacramento22
  2. Los Angeles20
  3. San Francisco10
  4. Orange9
  5. San Diego8

Gynecologic Oncology Physician records in California

  1. Jay Shah, MDIrvine, CA 926181881665495
  2. Jenta Shen, M.D.San Francisco, CA 941171881692002
  3. Amanda Shepherd, MDSacramento, CA 958161285963843
  4. Hyun Shvartsman, M.D.Baldwin Park, CA 917061619081262
  5. Tiffany Sia, M.D.Campbell, CA 950081760915912
  6. Michael Silverman, M.D.La Jolla, CA 920371376568741
  7. Jeffrey Skilling, MDSacramento, CA 958251003994716
  8. Lloyd Smith, M.D.Sacramento, CA 958171285616557
  9. Samantha Solaru, MDOrange, CA 928681588305528
  10. Mihae Song, MDDuarte, CA 910101144665423
  11. Nell Suby, MDSacramento, CA 958151215005160
  12. Betty Suh-Burgmann, MDWalnut Creek, CA 945961881772960
  13. Angel Tabuyo-Martin, MDSacramento, CA 958161003293523
  14. Jonathan Tammela, MDSanta Maria, CA 934541265451058
  15. John Tatman, MDSanta Clara, CA 950511184701021
  16. Devansu Tewari, MDAnaheim, CA 928071902827835
  17. Krishnansu Tewari, M.D.Orange, CA 928681205868445
  18. Katherine Tierney, M.D.Los Angeles, CA 900331669702502
  19. Arthur-Quan Tran, MDWest Hollywood, CA 900481518391275
  20. Jill Tseng, M.D.Orange, CA 928681265759807
  21. Stefanie Ueda, M.D.San Francisco, CA 941151780748087
  22. Steven Vasilev, MDSanta Monica, CA 904041407915150
  23. Robert Wagner, M.D.Loma Linda, CA 923541356363550
  24. Mark Wakabayashi, MDDuarte, CA 910101467547398
  25. Eijean Wu, MD, MPPLos Angeles, CA 900271396024600
  26. Annie Yessaian, M.D.Tarzana, CA 913561457356578

Source: CMS NPPES, primary taxonomy 207VX0201X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 34 of 50 per resident

  1. Georgia0.5
  2. Texas0.5
  3. Alabama0.5
  4. California0.5
  5. Kansas0.4
  6. Montana0.4
  7. 50 states and D.C.0.6

Source: CMS NPPES, primary taxonomy 207VX0201X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

86.4% of these records appear in a Medicare file, against 86.0% 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. California86.4%
  2. United States86.0%

Gynecologic Oncology Physician records in California, measured

  • In a Medicare file152 of 176 · 86.4% here, 86.0% nationally
  • In the CMS Doctors and Clinicians file131 · 74.4% here, 74.7% nationally
  • Not updated in five years or more99 · 56.3% here, 50.3% nationally
  • Median graduation year2004 · the 131 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207VX0201X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

176 NPPES records list gynecologic oncology physician (207VX0201X) as their primary taxonomy with a practice address in California: 0.5 per 100,000 residents against 0.6 nationally (50 states and D.C.). Sacramento has 22 of them (13%).

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 York181
  2. Texas149
  3. Florida125
  4. Pennsylvania98

States with a similar rate per 100,000

  1. Kansas0.4
  2. Alabama0.5
  3. Arizona0.4
  4. Georgia0.5

The largest states

  1. New York181
  2. Texas149
  3. Florida125
  4. Pennsylvania98
  5. Illinois76

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.