NPPES file of Aug 9, 2026

Gynecologic Oncology Physician in California

176 NPPES records list gynecologic oncology physician with a practice address in California, 0.5 per 100,000 residents, the 34th highest rate of 50. Sacramento and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 3 of 4.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207VX0201X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Sacramento has the most, 22

  1. Sacramento22
  2. Los Angeles20
  3. San Francisco10
  4. Orange9
  5. San Diego8

Gynecologic Oncology Physician records in California

  1. Cecil Lynch, MDGranite Bay, CA 957461760824833
  2. Vikas Mahavni, MDSacramento, CA 958251174601868
  3. Michael Manuel, M.D.Los Angeles, CA 900151780630095
  4. Lila MarshallOrange, CA 928681508446907
  5. Emily McClung, MDStanford, CA 943051851679765
  6. Michael McHale, MDLa Jolla, CA 920931508828179
  7. Sumit Mehta, M.D.Santa Barbara, CA 931051356790836
  8. Sanaz Memarzadeh, MDLos Angeles, CA 900951518998244
  9. Alberto Mendivil, M.D.Newport Beach, CA 926631801097662
  10. John Micha, M.D.Newport Beach, CA 926631538115324
  11. Ramin Mirhashemi, M.D.Torrance, CA 905051992744874
  12. Mazdak Momeni, M.D.Loma Linda, CA 923541275865917
  13. Lauren Montemorano, MDOakland, CA 946111891220844
  14. Ashley Moon, MDClovis, CA 936111417301722
  15. Mehdi Moslemi-Kebria, MDUpland, CA 917861558569830
  16. Laila Muderspach, M.D.Los Angeles, CA 900331306841648
  17. Andrea Nanez, M.D.San Francisco, CA 941431952837098
  18. Deepa Maheswari Narasimhulu, MDVentura, CA 930031174895882
  19. Monica Neuman, MDLos Angeles, CA 900331114457942
  20. Nancy Nguyen, MDSacramento, CA 958171518379171
  21. Trung Nguyen, D.O.,M.B.A.Clovis, CA 936111134331549
  22. Natsai Nyakudarika, M.D.Los Angeles, CA 900481154740751
  23. Katherine Ohanlan, M.D.Portola Valley, CA 940281467486407
  24. Steffanie Owens, M.D.Sacramento, CA 958171124349022
  25. Daniel Paik, MDWalnut Creek, CA 945981962673046
  26. Hyo Kyung Park, M.D.Santa Monica, CA 904041184910960
  27. Susan Park, MD MPHTorrance, CA 905021811159411
  28. Hansa Patel, MDBakersfield, CA 933011134219660
  29. Diana Cholakian Pearre, MDBurbank, CA 915051659714475
  30. Patrick PenalosaLa Jolla, CA 920371558998914
  31. Huyen Pham, M.D.Los Angeles, CA 900891922044940
  32. Melissa Pham, M.D.Sacramento, CA 958171275982852
  33. Albert Pisani, M.D.Mountain View, CA 940401295894673
  34. Steven Plaxe, M.D.San Diego, CA 921031942356795
  35. Catherine Powell, MDSan Francisco, CA 941431306995287
  36. Robert Pretorius, MDFontana, CA 923351083766455
  37. Amin Ramzan, M.D.Bakersfield, CA 933061932530714
  38. Mark Rettenmaier, M.D.Orange, CA 928681134166697
  39. William Rich, M.D.Fresno, CA 937101548286511
  40. Anne Rodriguez, M.D.Ventura, CA 930031316929565
  41. Lorna Rodriguez, MD, PHDDuarte, CA 910101457436719
  42. Lynda Roman, M.D.Pasadena, CA 911051386649713
  43. Rachel Ruskin, M.D.Sacramento, CA 958171457680738
  44. Cheryl Saenz, M.DLa Jolla, CA 920931396818134
  45. Lisa Sandles, MDSan Francisco, CA 941151932287562
  46. Alan Schlaerth, M.D.Arcadia, CA 910071043239049
  47. John Schlaerth, MDBakersfield, CA 933011457368029
  48. Roger Schlesinger, MDFullerton, CA 928351669439816
  49. Marla Scott, M.D.Los Angeles, CA 900481952797342
  50. Robert Segnit, MDLa Mesa, CA 919421649364746

Source: CMS NPPES, primary taxonomy 207VX0201X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 34 of 50 per resident

  1. Georgia0.5
  2. Texas0.5
  3. Alabama0.5
  4. California0.5
  5. Kansas0.4
  6. Montana0.4
  7. 50 states and D.C.0.6

Source: CMS NPPES, primary taxonomy 207VX0201X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

86.4% of these records appear in a Medicare file, against 86.0% 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. California86.4%
  2. United States86.0%

Gynecologic Oncology Physician records in California, measured

  • In a Medicare file152 of 176 · 86.4% here, 86.0% nationally
  • In the CMS Doctors and Clinicians file131 · 74.4% here, 74.7% nationally
  • Not updated in five years or more99 · 56.3% here, 50.3% nationally
  • Median graduation year2004 · the 131 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207VX0201X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

176 NPPES records list gynecologic oncology physician (207VX0201X) as their primary taxonomy with a practice address in California: 0.5 per 100,000 residents against 0.6 nationally (50 states and D.C.). Sacramento has 22 of them (13%).

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. New York181
  2. Texas149
  3. Florida125
  4. Pennsylvania98

States with a similar rate per 100,000

  1. Kansas0.4
  2. Alabama0.5
  3. Arizona0.4
  4. Georgia0.5

The largest states

  1. New York181
  2. Texas149
  3. Florida125
  4. Pennsylvania98
  5. Illinois76

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.