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 58 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. Jeffrey Martin, M.D.Ventura, CA 930031568490803
  2. Eleanor Martinez, M.D.Los Gatos, CA 950321740337252
  3. Elena Martinez, MDLos Angeles, CA 900341912067182
  4. Kelly Martinez, MDSan Marcos, CA 920691063616639
  5. Marsha Martinson, M.D.Downey, CA 902421043525157
  6. Marietta Marzan-Tan, MDBakersfield, CA 933111336127372
  7. Mahin Mashhood, MDBellflower, CA 907061093863078
  8. Danielle Mason, M.D.Loma Linda, CA 923541982882296
  9. Irene Mason, M.D.Santa Clara, CA 950511659509768
  10. Jill Mason, MDClovis, CA 936111033297841
  11. Latasha Mason, MDAnaheim, CA 928071891843884
  12. Nancy Mason, MDPalo Alto, CA 943041649312067
  13. Stewart Mason, M.D.Fresno, CA 937201871519835
  14. Shahryar Masouem, M.D.Irvine, CA 926201811166655
  15. Bonni Massa, M.D.Petaluma, CA 949541508933607
  16. James Massengill, M.D.Union City, CA 945871144308990
  17. Jay Masserman, M.D.Santa Ana, CA 927011598743510
  18. Katrin Massoudian, M.D.Gardena, CA 902481295734622
  19. Kavitha Master Sankar Raj, M.D.Mountain View, CA 940401427257922
  20. Steven Masters, MDSan Francisco, CA 941151437237039
  21. Lisa Masterson, MDSanta Monica, CA 904011497843692
  22. Namrata MasteySacramento, CA 958161720475411
  23. Jessica Matchett, M.D., MPHSan Francisco, CA 941151578611158
  24. Judith Mates, MDSan Francisco, CA 941271114017407
  25. Joginder Matharu, M.D.Fresno, CA 937201750498408
  26. Barbara Mathews, M.D.Santa Barbara, CA 931051619040821
  27. Catherine Mathis, M.D.Manteca, CA 953361457423279
  28. Saloni Mathur, MDFremont, CA 945381275093791
  29. Beth Matlock, M.D,Berkeley, CA 947051083722615
  30. Kristen Matsik, MDPalo Alto, CA 943061295807022
  31. George Matsuda, MDPasadena, CA 911051144220815
  32. Gary Matsumura, M.D.Vacaville, CA 956881144318965
  33. Jon Matsunaga, M.D.Santa Monica, CA 904041649362831
  34. Carole Matteri, MDPalo Alto, CA 943041275628257
  35. Mykenzie Mattheis, DOLodi, CA 952401992266464
  36. Helen Matthews, M.D.San Ramon, CA 945831013015627
  37. Edward Matuga, MDRiverside, CA 925071003890682
  38. Minha MaturanaVentura, CA 930031225492218
  39. Michael Maung, M.D.Diamond Bar, CA 917651225493810
  40. Arminda Mauricio, M.D.Sacramento, CA 958271104066919
  41. Joe Mawad, MDSan Bernardino, CA 924111003140948
  42. Bonnie Maxfield, MDWoodland Hills, CA 913671710026414
  43. Barrie May, MDLaguna Hills, CA 926531619935988
  44. Thomas MayeliLos Angeles, CA 900151629113196
  45. Jonathan Mayer, MDReedley, CA 936541043389513
  46. Kaitlyn Mayer, M.D.Twentynine Palms, CA 922781972961191
  47. Mayer Mayer, M.D.Huntington Park, CA 902551952311409
  48. Rosanne Mayhew, M.D.Los Gatos, CA 950321124120985
  49. Melanie Maykin, M.D.San Francisco, CA 941101346635133
  50. Matthew Maynard, D.O.Sonora, CA 953701861617417

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.