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 22 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. Roberto Diaz, M.D.Burlingame, CA 940101669453775
  2. Silvia DiazEl Monte, CA 917311396857868
  3. Teresa Diaz, MDOakland, CA 946021194735753
  4. Laurie Dibble, MDPetaluma, CA 949541487738555
  5. Florence Dibiase, MDStanford, CA 943051336709278
  6. Amanda Dickerson, M.D.Los Angeles, CA 900331336533421
  7. Karenna Dickerson, MDFoothill Ranch, CA 926101295952810
  8. Vivian Dickerson, M.D.Newport Beach, CA 926631356527683
  9. Erica Dickson, DOFountain Valley, CA 927081245656339
  10. Catherine Dieffenbach, MDSan Diego, CA 921211861810673
  11. Loraine Diego, MDLos Angeles, CA 900571386689453
  12. Patrick Diesfeld, M.D.Ventura, CA 930031568576080
  13. Frederick Dieterich, M.D.Vista, CA 920641720183650
  14. Peter Dietze, MDSan Diego, CA 921211336259290
  15. Susan Diez, MDSacramento, CA 958231699847343
  16. Nicolas Dikio, MDDowney, CA 902411972611762
  17. Gabriela Dilauro, MDEscondido, CA 920251326189275
  18. Todd Dillard, MDPleasanton, CA 945881346328424
  19. Keith Dillon, M.D.Santa Maria, CA 934541154407534
  20. Stephen Dimarzo, M.D.San Diego, CA 921211366479461
  21. Maria Dimeglio, M.D.Beverly Hills, CA 902121215264239
  22. Pattie Dimmette, M.D.Murrieta, CA 925621962501429
  23. Jason Dimsdale, MDSan Francisco, CA 941091457333973
  24. Kathleen Dinh, MDLos Angeles, CA 900271902555295
  25. My Dinh, D.O.Santa Maria, CA 934541316146996
  26. Mahnee Dinsmore, M.D.Grass Valley, CA 959451336132273
  27. Sudhakar Dixit, MDMoreno Valley, CA 925531518950377
  28. Christopher Dixon, MDStockton, CA 952101821176736
  29. Katherine Dixon, MDSan Diego, CA 921201669753315
  30. Gere Dizerega, MDLos Angeles, CA 900331114278843
  31. Christine DjapriTorrance, CA 905051881951127
  32. Anh Do, MDWalnut Creek, CA 945981548362122
  33. Hanh-Nguyen Do, MDPleasanton, CA 945881003907338
  34. Thuy Do, D.O.Sacramento, CA 958231912180266
  35. Danette Doan, MDStockton, CA 952101912085598
  36. Dominique Doan, M.D.San Gabriel, CA 917761043231632
  37. Daniel Dobalian, M.D.Orange, CA 928691578743894
  38. Sahar Doctorvaladan, MDSanta Rosa, CA 954051285957936
  39. Philip Dodd, MDLodi, CA 952401477578128
  40. Catherine Dodson, MDRoseville, CA 956611760019210
  41. Danna Doering, MDMilpitas, CA 950351336226265
  42. Gerald Doersam, MDModesto, CA 953501245525088
  43. Janna Doherty, M.D.Santa Cruz, CA 950651790898823
  44. Brad Dolinsky, MDFort Irwin, CA 923101942480199
  45. Sarah-Bianca Dolisca, M.D.Antioch, CA 945311821529579
  46. Christine Domenik, M.D.Aptos, CA 950031578926002
  47. Jennifer Domingo-Mihalko, MDSan Jose, CA 951281871556431
  48. Aaron Dominguez, MDReedley, CA 936541639360613
  49. Robert Domush, M.D.San Francisco, CA 941151932141454
  50. Medha Donde, MDOakland, CA 946111750522736

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.