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 48 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. Karen Kobayashi, D.O.Chula Vista, CA 919111497929517
  2. Zeynep Koc, MDSan Francisco, CA 941581457844144
  3. Peter Koch, M.D.Woodland, CA 956951386664928
  4. William Koch, M.D.Eureka, CA 955031821063686
  5. Dustin Kocol, MDOceanside, CA 920551487141586
  6. Tamas Kocsis, MDBakersfield, CA 933071366546798
  7. Karen Koe, MDLos Alamitos, CA 907201780648709
  8. Sara Koehler, M.D.Sacramento, CA 958171790752343
  9. Jenny KoenigSan Diego, CA 921031720668312
  10. Audrey Koh, M.D.San Francisco, CA 941151982781472
  11. Chang Koh, MDFontana, CA 923351952459851
  12. John Koh, MDSimi Valley, CA 930651841283009
  13. Kee Koh, M.D.Arcadia, CA 910071417057373
  14. Yoojin Koh, MDVallejo, CA 945891366520173
  15. Keren-Happuch Kohath, DOSanta Cruz, CA 950651699274233
  16. Karen KohatsuSan Diego, CA 921281679517239
  17. Frederick Kohn, M.D.Tarzana, CA 913561427124981
  18. Ronald Kohorn, MDAnaheim, CA 928071023166915
  19. Karen Kohut, M.D.San Jose, CA 951161720116502
  20. Bedros Kojian, MDOrange, CA 928681467498188
  21. Lindsay Kolderup, MDSan Jose, CA 951281356425193
  22. Dror Kolton, M.D.W Hollywood, CA 900691144513367
  23. Thianthong Kompor, MDMonterey Park, CA 917551669726865
  24. Nadya Kondrashov, M.D.Berkeley, CA 947051851658942
  25. Grace Kong, MDLos Angeles, CA 900331386836336
  26. Oyoung Kong, M.D.San Francisco, CA 941181548572001
  27. Stephanie Kong, MDSan Leandro, CA 945771083091748
  28. Lawrence Koning, M.D.San Diego, CA 921291063464675
  29. Choon Koo, MDCorena, CA 928821457345894
  30. Austin Kooba, MDCalexico, CA 922311982756102
  31. Sharon Kopacz, MDFresno, CA 937201952552333
  32. Kimberly Kopecky, MDRoseville, CA 956611770661480
  33. Brian Koperek, MDLaguna Hills, CA 926531306894191
  34. Christiana Kopf, M.D.Elk Grove, CA 957581548356942
  35. Mark Korkowski, MDSan Jose, CA 951191164572962
  36. Yelena Korotkaya, MDLos Angeles, CA 900951962829218
  37. Vasilios Korovilas, M.D.Tulare, CA 932741215135959
  38. Jonathan Kort, M.D.Stanford, CA 943051326364332
  39. Anthony Kosinski, M.D.Petaluma, CA 949541588656631
  40. Juthamas KositsawatLoma Linda, CA 923541104246016
  41. Agata Kosmalska, MDFremont, CA 945381831486679
  42. Prema Kothandaraman, M.D.Arcadia, CA 910061073556064
  43. Vikram Kothandaraman, M.DLos Angeles, CA 900571720129141
  44. Anita Kovacic, MDBeverly Hills, CA 902111659446243
  45. Olga Kovalenko, MDModesto, CA 953551710514674
  46. Julius Kpaduwa, MDEl Monte, CA 917311578630125
  47. Alexandria Kragie, MDStanford, CA 943051700313285
  48. Witoon Krailas, MDSanta Ana, CA 927031265432207
  49. Emily Krasowsky, MDDiamond Bar, CA 917651669933552
  50. Kenneth Kraus, M.D.Newport Beach, CA 926601033439583

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.