NPPES file of Aug 9, 2026

Obstetrics & Gynecology Physician in California

5,088 NPPES records list obstetrics & gynecology physician with a practice address in California, 13 per 100,000 residents, the 29th 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 93 of 102.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207V00000X · 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, 381

  1. Los Angeles381
  2. San Diego279
  3. San Francisco250
  4. Sacramento198
  5. San Jose129

Obstetrics & Gynecology Physician records in California

  1. Henry Tsai, M.D.Monterey Park, CA 917541366476764
  2. James Tsai, MDBakersfield, CA 933111356329494
  3. Jerry Tsai, M.D.San Francisco, CA 941151104976091
  4. Lily Tsai, MDEncinitas, CA 920241184633638
  5. Linda Tsai, D.O.San Jose, CA 951241902908577
  6. Michelle Tsai, M.D.Santa Monica, CA 904041740575950
  7. Rebecca TsaiSanta Clara, CA 950511447725338
  8. Shiu Tsai, M.D.Madera, CA 936371376611038
  9. Wen-Fang Tsai, MDStockton, CA 952101811061138
  10. Wun-Yi Tsai, M.D.San Jose, CA 951291588608921
  11. Stephen Tsang, MDTracy, CA 953761568494763
  12. Mary TsaturianColton, CA 923241538743695
  13. Angie Tsuei, MDRedwood City, CA 940631225699580
  14. Ilene Tsui, M.DOxnard, CA 930301063874840
  15. Timothy Tsui, M.D.Los Angeles, CA 900481578575791
  16. Sofya Tsyganovskaya, M.D.Burbank, CA 915061336204312
  17. Karen Tuan, M.D.San Francisco, CA 941081669441358
  18. Ke Tuan, M.D.San Francisco, CA 941081104873520
  19. Dale Tucker, MDWalnut Creek, CA 945961265510341
  20. Nicolae Tudorica, M.D.Downey, CA 902421801022926
  21. Blair Tull, M.D.Salinas, CA 939011972859320
  22. Sing Tung, MDSanta Ana, CA 927041619913720
  23. Justin Tureson, D.O.San Diego, CA 921341477714327
  24. Duncan Turner, MDSanta Barbara, CA 931011003836735
  25. Sarah Turner, M.D.Redding, CA 960011720240096
  26. Nicholas Tuso, M.D.Valencia, CA 913551881623676
  27. Kimberly Tustison, MDCorona, CA 928831063731297
  28. Sara Twogood, MDLos Angeles, CA 900171407098551
  29. Mor Tzadik, MDPanorama City, CA 914021770622466
  30. Miin Tzeng, MDValencia, CA 913551134211394
  31. Yinn Tzeng, MDSan Francisco, CA 941151215015813
  32. Yu-Yea Tzeng, MDManteca, CA 953371366516676
  33. Michelle Uaje, M.D.Van Nuys, CA 914051659427649
  34. Catherine Uchino, MDSan Marcos, CA 920781790190437
  35. Chukwuma Udeh, MDSan Bernardino, CA 924041700976065
  36. Camillus Udoffia, MDSacramento, CA 958231366521494
  37. Abby Uhrinak, M.D.Westlake Village, CA 913611528431673
  38. Maia Uli, D.OSan Diego, CA 921271104264795
  39. Mary Ulrich, MDSan Francisco, CA 941181891841474
  40. Lisa Underwood, D.O.San Diego, CA 921231225319742
  41. Nicolle Underwood, MDNewport Beach, CA 926631881821122
  42. Feei Feei Ung, M.D.Clovis, CA 936111013235605
  43. Raleigh Unterseher, M.D.Chico, CA 959261982641387
  44. Jigisha Upadhyaya, MDBakersfield, CA 933111427036565
  45. Karl Urban, MDFontana, CA 923351306913272
  46. Mary Jo Urso, D.O.Hemet, CA 925431386642783
  47. Guillermo Urzua, M.D.Los Angeles, CA 900271841580479
  48. Mae Ushigome, M.D.Beverly Hills, CA 902111285646414
  49. David Uyeno, MDSacramento, CA 958251194803809
  50. Viruch Vachirakorntong, M.D.Apple Valley, CA 923071659428001

Source: CMS NPPES, primary taxonomy 207V00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 29 of 51 per resident

  1. Wisconsin13
  2. Ohio13
  3. Washington13
  4. California13
  5. Indiana13
  6. Georgia13
  7. 50 states and D.C.14

Source: CMS NPPES, primary taxonomy 207V00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

73.5% of these records appear in a Medicare file, against 75.6% 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. California73.5%
  2. United States75.6%

Obstetrics & Gynecology Physician records in California, measured

  • In a Medicare file3,740 of 5,088 · 73.5% here, 75.6% nationally
  • In the CMS Doctors and Clinicians file2,703 · 53.1% here, 60.3% nationally
  • Not updated in five years or more3,239 · 63.7% here, 56.2% nationally
  • Median graduation year2004 · the 2,700 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207V00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

5,088 NPPES records list obstetrics & gynecology physician (207V00000X) as their primary taxonomy with a practice address in California: 13 per 100,000 residents against 14 nationally (50 states and D.C.). Los Angeles has 381 of them (7%).

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. Texas3,524
  2. New York3,174
  3. Florida2,601
  4. Illinois2,062

States with a similar rate per 100,000

  1. Indiana13.0
  2. Georgia13.0
  3. Washington13.3
  4. Ohio13.3

The largest states

  1. Texas3,524
  2. New York3,174
  3. Florida2,601
  4. Illinois2,062
  5. Pennsylvania1,974

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.