NPPES file of Aug 9, 2026

Maternal & Fetal Medicine Physician in California

343 NPPES records list maternal & fetal medicine physician with a practice address in California, 0.9 per 100,000 residents, the 29th highest rate of 50. Los Angeles and San Diego have the most; each record links to the provider's NPI and the California license search. Page 7 of 7.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207VM0101X · 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, 43

  1. Los Angeles43
  2. San Diego36
  3. San Francisco32
  4. Palo Alto26
  5. Orange17

Maternal & Fetal Medicine Physician records in California

  1. Alex Soffici, M.D.Santa Barbara, CA 931051679527113
  2. Giuliana Songster, M.D.Los Angeles, CA 900151518962513
  3. Kimberlee Sorem, MDSan Francisco, CA 941151629089636
  4. Andrew Spencer, M.D.Venice, CA 902911467647537
  5. Roger Spencer, MDSan Jose, CA 951281861423121
  6. Meryl Sperling, MDPalo Alto, CA 943041386022424
  7. Lorraine Stanco, MDSan Diego, CA 921231609034578
  8. Craig Stark, MDMadera, CA 936361386788081
  9. Leanna Sudhof, MDSacramento, CA 958171679869069
  10. Sanaa Suharwardy, MDPalo Alto, CA 943041063855666
  11. Kareem TabshSanta Monica, CA 904041225437635
  12. Khalil Tabsh, M.D.Los Angeles, CA 900951215968474
  13. Veronique Tache, M.D.Sacramento, CA 958171720055478
  14. Maryam Tarsa, M.D.La Jolla, CA 920371295768638
  15. Elizabeth Teal, MD/MPHLa Jolla, CA 920371972965630
  16. Martha Tesfalul, MDSan Francisco, CA 941431619241999
  17. Steven Thomas, MDSan Diego, CA 921031639242589
  18. Tevy Tith, M.D.San Diego, CA 921231588816086
  19. Jeffrey Traynor, M.D.Walnut Creek, CA 945981316981699
  20. Neha Trivedi, M.D.San Diego, CA 921231629123286
  21. Kristen Uquillas, M.D.Los Angeles, CA 900151336466804
  22. Guillermo Valenzuela, MDColton, CA 923241730263484
  23. Jean-Claude Veille, M.D.Elk Grove, CA 957571639165368
  24. Quynh Vo-Hanser, MDTorrance, CA 905051295815736
  25. Anne Waldrop, MDPalo Alto, CA 943041851825665
  26. David Walton, MDMadera, CA 936361871565416
  27. Sarah Watson, MDRoseville, CA 956611548657745
  28. Jonathan Weiss, M.D., F.A.C.O.GOakland, CA 946091770523771
  29. Melissa Westermann, MDSan Diego, CA 921231760730758
  30. John Williams III, M.D.Los Angeles, CA 900481205819133
  31. Deborah Wing, MDOrange, CA 928681881798460
  32. Virginia Winn, MD, PHDPalo Alto, CA 943041518974005
  33. Richard Wolf, DOLa Jolla, CA 920371497713846
  34. Rosa Won, M.D.Walnut Creek, CA 945961952489718
  35. Amy Wong, M.D.Mountain View, CA 940401912181553
  36. Melissa Wong, MD, MHDSLos Angeles, CA 900481740595313
  37. Erica Wu, MDPalo Alto, CA 943041518272566
  38. Stacy Yadava, M.D.Stockton, CA 952041154689677
  39. Tiffany Yang, MDLos Angeles, CA 900331275029506
  40. Amanda Yeaton-Massey, MDMountain View, CA 940401710238498
  41. Ophelia Yin, MDSan Francisco, CA 941431346630936
  42. Margaret Yonekura, M.D.Los Angeles, CA 900151750419156
  43. Ming Zhou, MDSan Francisco, CA 941091841314424

Source: CMS NPPES, primary taxonomy 207VM0101X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 29 of 50 per resident

  1. Virginia0.9
  2. Hawaii0.9
  3. Arizona0.9
  4. California0.9
  5. Minnesota0.9
  6. Louisiana0.9
  7. 50 states and D.C.1.0

Source: CMS NPPES, primary taxonomy 207VM0101X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

61.2% of these records appear in a Medicare file, against 76.2% 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. California61.2%
  2. United States76.2%

Maternal & Fetal Medicine Physician records in California, measured

  • In a Medicare file210 of 343 · 61.2% here, 76.2% nationally
  • In the CMS Doctors and Clinicians file181 · 52.8% here, 66.6% nationally
  • Not updated in five years or more175 · 51.0% here, 46.9% nationally
  • Median graduation year2003 · the 181 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207VM0101X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

343 NPPES records list maternal & fetal medicine physician (207VM0101X) as their primary taxonomy with a practice address in California: 0.9 per 100,000 residents against 1 nationally (50 states and D.C.). Los Angeles has 43 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. Texas308
  2. New York292
  3. Florida182
  4. Pennsylvania143

States with a similar rate per 100,000

  1. Arizona0.9
  2. Minnesota0.9
  3. Hawaii0.9
  4. Louisiana0.9

The largest states

  1. Texas308
  2. New York292
  3. Florida182
  4. Pennsylvania143
  5. Illinois128

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.