NPPES file of Aug 9, 2026

Neonatal-Perinatal Medicine Physician in California

871 NPPES records list neonatal-perinatal medicine physician with a practice address in California, 2.2 per 100,000 residents, the 23rd highest rate of 50. Los Angeles and Palo Alto have the most; each record links to the provider's NPI and the California license search. Page 17 of 18.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2080N0001X · 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, 89

  1. Los Angeles89
  2. Palo Alto89
  3. San Diego82
  4. Orange63
  5. San Francisco47

Neonatal-Perinatal Medicine Physician records in California

  1. Nadarasa Visveshwara, M.DMadera, CA 936381871535732
  2. Cong Vo, M.D.Pomona, CA 917671689721342
  3. David Vogel, M.D.Laguna Hills, CA 926531073576658
  4. John Vogt, M.D.Pasadena, CA 911051417969577
  5. Stephannie Voller, M.D.San Diego, CA 921231417121971
  6. Farha Vora, M.D.Loma Linda, CA 923541861780462
  7. Nidia Vyhmeister, MDLoma Linda, CA 923501194051979
  8. Feizal Waffarn, MDOrange, CA 928681518061100
  9. Sandra Wai, M.D.Oakland, CA 946091164667002
  10. Jeffrey Walker, MDSan Jose, CA 951281972685931
  11. Matthew Wallenstein, M.D.Palo Alto, CA 943041972824605
  12. Franciskus Walther, M.D, PH.DTorrance, CA 905021265352157
  13. Andy Chunyao Wang, M.D.Pasadena, CA 911051922263979
  14. Tungho Wang, M.D.San Jose, CA 951241700841269
  15. Anthony Wartell, M.D.Carmichael, CA 956081114011608
  16. Wambui Waruingi, MDRancho Mirage, CA 922701033313143
  17. James Washington, M.D.Yucaipa, CA 923991073846028
  18. Tameka Watson, MDOrange, CA 928681811491327
  19. Rebecca Webb, MDSan Francisco, CA 941431942838149
  20. Carla Weis, M.D.Orange, CA 928681588693006
  21. Katherine Weiss, MDSan Diego, CA 921231053541862
  22. Fiona Wertheimer, D.O.Los Angeles, CA 900331174672885
  23. Andrew Wertz, MDSacramento, CA 958161013909621
  24. Julie West, M.D.San Diego, CA 921231811151848
  25. Chris White, M.D.San Francisco, CA 941181841338159
  26. Lawrence Wickham, M. D.Orange, CA 928681982667820
  27. Nancy Wight, M.D.San Diego, CA 921231366524605
  28. Cynthia Wikler, M.D.San Leandro, CA 945771215016365
  29. Jacqueline Wilk, MDSan Francisco, CA 941031528251840
  30. Erin Willey, M.D.Loma Linda, CA 923541710129952
  31. Ronald Williams, MDFontana, CA 923351740357979
  32. Mary Wilson, MDLos Angeles, CA 900271609935204
  33. Jacqueline Winkelmann, MDOrange, CA 928681215026331
  34. Audra Wise, MDSan Diego, CA 921231295034056
  35. Allan Wolpe, M.D.Redlands, CA 923731619179033
  36. Carlene Wong, MDSanta Clara, CA 950511235216193
  37. Erna Wong, MDAnaheim, CA 928071285701185
  38. Jadene Wong, MDPalo Alto, CA 943041376620393
  39. Victor Wong, MDBellflower, CA 907061336216225
  40. Karen Woo, DORoseville, CA 956611245318906
  41. Carrie Worcester, MDOrange, CA 928681235215484
  42. Paul Wozniak, M.D.San Diego, CA 921231457422214
  43. Tai-Wei Wu, M.D.Los Angeles, CA 900271619179322
  44. Yu Wu, M.D.Upland, CA 917861285669861
  45. Carl Yaeger, MDCorral De Tierra, CA 939081427048875
  46. Loren Yaeger, D.O.Los Angeles, CA 900331366826091
  47. Nicole Yamada, M.D.Palo Alto, CA 943041457620197
  48. Jon Yamamoto, MDTorrance, CA 905031619932928
  49. Linda Yang, M.D.West Covina, CA 917901376543389
  50. Timothy Yao, MDModesto, CA 953501558304352

Source: CMS NPPES, primary taxonomy 2080N0001X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 23 of 50 per resident

  1. Kentucky2.4
  2. Oklahoma2.3
  3. Texas2.3
  4. California2.2
  5. Hawaii2.2
  6. Montana2.2
  7. 50 states and D.C.2.3

Source: CMS NPPES, primary taxonomy 2080N0001X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

14.6% of these records appear in a Medicare file, against 15.6% 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. California14.6%
  2. United States15.6%

Neonatal-Perinatal Medicine Physician records in California, measured

  • In a Medicare file127 of 871 · 14.6% here, 15.6% nationally
  • In the CMS Doctors and Clinicians file61 · 7.0% here, 7.0% nationally
  • Not updated in five years or more470 · 54.0% here, 55.5% nationally
  • Median graduation year2012 · the 61 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2080N0001X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

871 NPPES records list neonatal-perinatal medicine physician (2080N0001X) as their primary taxonomy with a practice address in California: 2.2 per 100,000 residents against 2.3 nationally (50 states and D.C.). Los Angeles has 89 of them (10%).

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. Texas697
  2. New York513
  3. Florida457
  4. Pennsylvania393

States with a similar rate per 100,000

  1. Hawaii2.2
  2. Montana2.2
  3. Virginia2.2
  4. Oklahoma2.3

The largest states

  1. Texas697
  2. New York513
  3. Florida457
  4. Pennsylvania393
  5. Illinois362

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.