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 66 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. Rowona Ng, MDWoodland Hills, CA 913671578630455
  2. Stephanie Ng, MDSan Diego, CA 921281194143230
  3. Huong Nghiem-Eilbeck, MD, MPHSouth Gate, CA 902801508023706
  4. Nathaniel Ngo, MDWoodland, CA 956951497913404
  5. Trang T Ngo, MDFremont, CA 945381891762043
  6. Anh Nguyen, MDSanta Clara, CA 950511821175779
  7. Baotram Nguyen, M.D.Castro Valley, CA 945461255607727
  8. Cynthia Nguyen, DOPasadena, CA 911051679078018
  9. Dan-Anh Nguyen, M.D.San Jose, CA 951281548206113
  10. Daniel Nguyen, MDFresno, CA 937201982776639
  11. David Nguyen, MD.Valencia, CA 913551811042344
  12. Diana Nguyen, M.D.Fresno, CA 937011316241847
  13. Diep Nguyen, MDBellflower, CA 907061184776544
  14. Eliza Nguyen, MDGilroy, CA 950201447838990
  15. Ha Nguyen, M.D.Garden Grove, CA 928431447275631
  16. Hao Nguyen, M.D.San Jose, CA 951241750429684
  17. Helena NguyenOrange, CA 928691124760079
  18. John Nguyen, M.D.Fallbrook, CA 920281306078522
  19. John Nguyen, M.D.Porterville, CA 932571154308963
  20. Lena Nguyen, DOFountain Valley, CA 927081467741728
  21. Lily Nguyen, MDSan Jose, CA 951111285720342
  22. Maiuyen Nguyen, M.D.Carmichael, CA 956081952622052
  23. Nam Nguyen, MDDublin, CA 945681033158704
  24. Nathalie Nguyen, D.O.Glendale, CA 912061164866901
  25. Phuong Nguyen, M.D.Santa Clara, CA 950511457599789
  26. Phuong Nguyen, MDSan Jose, CA 951281144314626
  27. Quy Nguyen, M.D.Marina Del Rey, CA 902921336555333
  28. Son Nguyen, M.D.San Diego, CA 921081548332513
  29. Song Nguyen, MDSanta Clara, CA 950511831276773
  30. Thuong-Thuong Nguyen, M.D.San Jose, CA 951281215119888
  31. Tina Nguyen, MDLos Angeles, CA 900951336307974
  32. Tuong Van Nguyen, M.D.Garden Grove, CA 928401851719132
  33. Van Nguyen, DOSanta Ana, CA 927041205845237
  34. Christine Nguyen Dawson, MDOrange, CA 928681407458029
  35. Ann Nguyen Pham, MDOrange, CA 928681578190542
  36. Diemchi Nguyenphuc, MDSanta Ana, CA 927041629104930
  37. Madeleine NicastroTempleton, CA 934651760062863
  38. Lisa Nicholas, MDLos Angeles, CA 900951750380648
  39. Martina Nicholson, MDSanta Cruz, CA 950651144381815
  40. Barbara Nicol, M.D.San Francisco, CA 941101710907811
  41. Sandra Nieto, MDMontebello, CA 906401003830258
  42. Vanessa Nieto, MDSacramento, CA 958141437656311
  43. Elisabeth Nigrini, MDSouth Lake Tahoe, CA 961501689776684
  44. Aki Niihara, M.D.Lancaster, CA 935351114286952
  45. Malini Nijagal, MDSan Francisco, CA 941101043322233
  46. Gelareh Nikpour-Heravi, M.D.Orange, CA 928691013302876
  47. Daniel Niku, M.D.Beverly Hills, CA 902111669859732
  48. Abigail NimzSimi Valley, CA 930651750736260
  49. Hung Ninh, M.D.San Jose, CA 951211558319335
  50. Jim Nishimine, MDBerkeley, CA 947051518036714

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.