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 9 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. Brian Bigelow, MDTurlock, CA 953821033297940
  2. Jacadi Bignami, M.D.Orange, CA 928681780023804
  3. Timothy Bilash, M.D., M.S.La Jolla, CA 920371437189545
  4. Zelda Billingy, M.D.Montebello, CA 906401881735165
  5. Lawrence Bines, M.D.Lompoc, CA 934261679517460
  6. Lisa Bird, MDLos Angeles, CA 900341609404102
  7. Emily Birenbaum, M.D.Palo Alto, CA 943061467619122
  8. John Birsner, MDLancaster, CA 935341457443525
  9. Robert Biter, M.D.Encinitas, CA 920241932169661
  10. Laura Biver, MDLa Jolla, CA 920371669091427
  11. Ramin Bizhang, MDBakersfield, CA 933011144397035
  12. Frederick Blair, M.D.Fairfield, CA 945331386731768
  13. Karen Blanchard, M.D.Santa Monica, CA 904031700925401
  14. Michael Bleecker, M.D.Livermore, CA 945501437218328
  15. Katherine Blenko, MDSan Jose, CA 951281063485167
  16. Julia Bley, MDOakland, CA 946011831357177
  17. Aminah Bliss, M.D.Los Angeles, CA 900481225087463
  18. Judith BlissMartinez, CA 945531184781064
  19. Ira Blitz, MDBaldwin Park, CA 917061558419481
  20. Barry Block, M.D.Loma Linda, CA 923541134141328
  21. Richard Block, MDSan Diego, CA 921201770631673
  22. Edward Blumenstock, MDOakland, CA 946091235156738
  23. Elizabeth Blumenthal, MDSan Francisco, CA 941431164759916
  24. Bruce Bob, M.D.Sacramento, CA 958251841267234
  25. Anna Bobba, M.D.San Luis Obispo, CA 934011134230386
  26. Milana Bochkur Dratver, MDLos Angeles, CA 900481245980143
  27. Stephen Bochner, MDMalibu, CA 902651972486272
  28. Donna Bodnar, MDNapa, CA 945581720166564
  29. Lisa Bodon, M.D.Palm Springs, CA 922621063619013
  30. Donald Boehm, MDClovis, CA 936111922133321
  31. Christian Boehmer, MDAnaheim, CA 928071427106491
  32. Kathryn Boente, MDDaly City, CA 940151780691576
  33. Sally Boero, M.D.Larkspur, CA 949391285731703
  34. Yvonne Bohn, M.D.Santa Monica, CA 904041417058587
  35. Lorianne Boken, M.D.Visalia, CA 932911609824325
  36. Jose Bolanos, MDLos Gatos, CA 950321992721989
  37. Oscar Bolch, M.D.Chula Vista, CA 919131144238361
  38. Julie Boles, M.D.Pasadena, CA 911881922126374
  39. Oluwamuyiwa Bolonduro, M.DLancaster, CA 935341215216965
  40. Aditi Bommireddy, MDLivermore, CA 945511205398609
  41. Jennifer Boni, M.D.Placerville, CA 956671558570911
  42. Adam Bonnington, MDSan Francisco, CA 941101811382328
  43. Colleen Bonpane Londono, MDHarbor City, CA 907101033278692
  44. Shelby Booker, DONapa, CA 945581831626381
  45. Charles Bookoff, MDSan Rafael, CA 949011982664496
  46. Andrea Boone, M.D.Visalia, CA 932771528016235
  47. Bungorn Boonsurmsuwongse, M.D.Visalia, CA 932911285728758
  48. Richard Boos, MDRedondo Beach, CA 902771053384719
  49. Gholamreza BorazjaniSeal Beach, CA 907401770503286
  50. Christian Borberg Franceschi, MDTulare, CA 932741689974610

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.