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 67 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. Angela Nishio, M.D.Santa Monica, CA 904041053320242
  2. Oriel NissimGlendora, CA 917411447606694
  3. Nandini Nittur, MDSanta Barbara, CA 931051013406859
  4. Shelly Nitz, MDTorrance, CA 905031073929956
  5. David Niver, MDWalnut Creek, CA 945961407934573
  6. Helen Noble, MDSan Rafael, CA 949031548848781
  7. Katherine Noel, M.D.Salinas, CA 939011164788782
  8. Tae Noh, MDSanta Clara, CA 950511851315667
  9. David Nomeland, M.D.Santa Barbara, CA 931101861588386
  10. Wakako Nomura, MDMountain View, CA 940411497832349
  11. Suchada Nopachai, MDSan Jose, CA 951191699851105
  12. Sarah Noppen, D.O.Apple Valley, CA 923081649533274
  13. Mariah Norby, D.O.Travis Afb, CA 945351760917280
  14. Jenny Nordin, D.O.Irvine, CA 926181386895266
  15. Emilia NorlinSan Diego, CA 921031386278950
  16. Bridget Norman-Malme, MDModesto, CA 953561700964525
  17. Jennifer Normoyle, MDDaly City, CA 940151336227933
  18. Sara Noroozkhani, MDSan Jose, CA 951281760649453
  19. Laura Norrell, MDSan Francisco, CA 941101376560755
  20. Sarah Norris, APRN, WHNP-BCYreka, CA 960971215216643
  21. Norene Norris-Walsh, MDLaguna Hills, CA 926531952350225
  22. Cheryl Northey, M.D.Watsonville, CA 950761760513253
  23. Mary Norton, M.D.San Francisco, CA 941171629007091
  24. Vladimir Nossov, M.D.Los Angeles, CA 900951013117605
  25. Manda Notzon, M.D.Pinole, CA 945641295000453
  26. Mallory Novack, D.O.Colton, CA 923241427324185
  27. Tara NowakhtarPlaya Vista, CA 900941255746475
  28. Stanley Nowinski, M.D.Yuba City, CA 959911942311287
  29. Onouwem NseyoSan Francisco, CA 941101619395027
  30. Deborah Nucatola, M.D.Los Angeles, CA 900071336166024
  31. Evelyn Nunez, MDSan Jose, CA 951191164501292
  32. Lesley Nurse, MDChula Vista, CA 919101407865348
  33. Charles Nuss, D.O.Oxnard, CA 930331629177753
  34. Rhoda Nussbaum, MDSan Francisco, CA 941151851479448
  35. Helen Nutter, M.D.Sacramento, CA 958161437167624
  36. Stephen Nystul, MDSan Diego, CA 921201063560860
  37. Julianne O'Callahan, MDRedwood City, CA 940621932158805
  38. Cristina O'Day, MDAnaheim, CA 928011275738940
  39. Carolyn O'Dell, MDSacramento, CA 958251215089016
  40. Betsy O'Donnell, M.D.Oakland, CA 946111932436078
  41. Irene O'Farrell, MDSacramento, CA 958231730267238
  42. Gary O'Hara, M.D.San Diego, CA 921231033121207
  43. Brooke O'Neill, PA-CLa Jolla, CA 920371851037006
  44. Shea O'Neill, MDSan Diego, CA 921341740251602
  45. Megan Oakes, MDLong Beach, CA 908061811377195
  46. Kolleen Obannon Henderson, NPGlendale, CA 912081215027206
  47. Lisa Obasi, MDLos Angeles, CA 900481952954794
  48. Erica Oberman, MDLos Angeles, CA 900951366604969
  49. Shawanda Obey, M.D.Rancho Cucamonga, CA 917301922125442
  50. Jaime Ocampo, M.D.Palo Alto, CA 943041144251760

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.