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 16 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. Steve Cheung, M.D., PH.D.Hesperia, CA 923451598774796
  2. Sum Cheung, MDLoma Linda, CA 923501770799942
  3. Winnie Cheung, M.D.Union City, CA 945871124107271
  4. Emma Chew MurphySan Francisco, CA 941151073074100
  5. Gayatri Chhatre, M.D.San Diego, CA 921311972739746
  6. Alexander Chiang, M.D.Santa Monica, CA 904041083931521
  7. Frank Chiang, MDPomona, CA 917671457456287
  8. John Chiang, MDAlhambra, CA 918011154332617
  9. Julian Chiang, M.D.Oxnard, CA 930301043276363
  10. Ashley Chiarappa, MDSantee, CA 920711760983092
  11. Elaine Chien, MDRedwood City, CA 940621457423295
  12. Anthony Chin, MDBeverly Hills, CA 902101649315375
  13. Victor Chin, MDOakland, CA 946111598843385
  14. William Chin-Lee, MDSan Diego, CA 921201083762801
  15. Marissa Chinn, MDElk Grove, CA 957581205463627
  16. Monica Chiu, M.D.San Rafael, CA 949031740696509
  17. Lisa Chodak, M.D.El Dorado Hills, CA 957621750487310
  18. Chul Choi, MDFontana, CA 923351639227416
  19. David Choi, M.D.Pomona, CA 917671881947117
  20. Joon Choi, MDSun Valley, CA 913521023073152
  21. Kenny Choi, M.D.Chula Vista, CA 919101063481117
  22. Mark Choi, MDLos Angeles, CA 900231831231521
  23. Manuel Chon, M.D.Downey, CA 902411568478725
  24. Deborah Chong, M.D.Grass Valley, CA 959451902880297
  25. Erin Chong, M.D.Sunnyvale, CA 940861407111271
  26. Lisa Chong, MDUpland, CA 917861467539304
  27. Meera Chong, MDRoseville, CA 956611275648974
  28. Dana Chortkoff, M.D.San Diego, CA 921301891899068
  29. Cindy Chou, MDSan Gabriel, CA 917761821010745
  30. Jeyling ChouSan Jose, CA 951241336535277
  31. Jennifer Chou-Kim, MDRiverside, CA 925051457428377
  32. Emanuela ChristatiLoma Linda, CA 923541477998177
  33. Kamilee Christenson, MDMenlo Park, CA 940251851652242
  34. Lee Christianson, MDLafayette, CA 945491922363746
  35. Eldonna Christie, M. D.Napa, CA 945581255766614
  36. Adwoa Christy, MDSanta Cruz, CA 950651225017379
  37. Emily Chu, MDPasadena, CA 911051053947978
  38. Jennifer ChuTorrance, CA 905031659791903
  39. Karen Chu, MDSan Francisco, CA 941091053436899
  40. Margaret Chu, MDSan Jose, CA 951281801985627
  41. Michael Chu, M.D.Sacramento, CA 958161235106881
  42. Robert Chu, MDLos Angeles, CA 900271629145560
  43. Vivian ChuLos Angeles, CA 900271952765521
  44. Sandy Chuan-Dinh, M.D.La Jolla, CA 920931275724478
  45. Justin Chuang, MDAnaheim, CA 928021811065691
  46. Jessica Chun, MDIrvine, CA 926181023392321
  47. Lorraine Chun, M.D.Desert Hot Springs, CA 922401437112513
  48. Stephanie Chun, MDSan Francisco, CA 941181285750943
  49. Grace ChungLos Angeles, CA 900481093088726
  50. Kathleen Chung, MDBerkeley, CA 947041811524648

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.