NPPES file of Aug 9, 2026

Clinical Genetics (M.D.) Physician in California

151 NPPES records list clinical genetics (m.d.) physician with a practice address in California, 0.4 per 100,000 residents, the 14th highest rate of 49. Los Angeles and San Francisco 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 207SG0201X · 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, 28

  1. Los Angeles28
  2. San Francisco18
  3. Orange13
  4. Palo Alto13
  5. Sacramento13

Clinical Genetics (M.D.) Physician records in California

  1. Matthew Neu, MD, PHDPalo Alto, CA 943041275113458
  2. Grace Noh, MDIrvine, CA 926021841452885
  3. Seymour Packman, M.D.San Francisco, CA 941431972545275
  4. Kanika Parashar, MBBSSan Francisco, CA 941431942761689
  5. Wai Park, D.O.Duarte, CA 910101871970541
  6. Leslie Raffel, M.D.West Hollywood, CA 900481376571943
  7. Aleksandar Rajkovic, MDSan Francisco, CA 941431588744908
  8. Linda Randolph, MDLos Angeles, CA 900271255427324
  9. Katherine Rauen, M. D.Sacramento, CA 958171831267228
  10. Eyal Reinstein, MD., PHDLos Angeles, CA 900481760765226
  11. Greysha Rivera-Cruz, MDSunnyvale, CA 940871215324637
  12. Jorge Rodriguez-Gil, MD, DPHIL.Roseville, CA 956611285213413
  13. Alan RopeSouth San Francisco, CA 940801619056181
  14. Bianca Russell, M.D.Los Angeles, CA 900951548604895
  15. Maura Ruzhnikov, MDPalo Alto, CA 943041982920765
  16. Pedro Sanchez, M.D.Los Angeles, CA 900481255544508
  17. Maren Scheuner, MD, MPHLos Angeles, CA 900481558583526
  18. Alison SchildtPalo Alto, CA 943041538620620
  19. Katharina Schmolly, MDLos Angeles, CA 900951972368256
  20. Daniela Schweitzer, MDLos Angeles, CA 900951336235233
  21. Suma Shankar, M.D., PHDSacramento, CA 958171427266055
  22. Joseph Shen, MD, PHDSacramento, CA 958171477633816
  23. Joseph ShiehSan Francisco, CA 941431063617298
  24. Nancy Shinno, MDLos Angeles, CA 900271962579896
  25. Thomas Slavin, M.D.La Crescenta, CA 912141023224557
  26. Joyce So, MD, PHDSan Francisco, CA 941431649832353
  27. Jee Hey Song, MDSan Jose, CA 951231255820999
  28. David Stevenson, MDPalo Alto, CA 943041073617460
  29. Shawn Tahata, MDSan Francisco, CA 941181285139170
  30. Adriana Maria Tavares Gomes, MDSan Diego, CA 921031396439444
  31. Jessica Tenney, M.D.San Francisco, CA 941431033464821
  32. Kamer Tezcan, MDSacramento, CA 958251427136175
  33. George Tiller, MDLos Angeles, CA 900271821169715
  34. Christina Tise, MD, PHDPalo Alto, CA 943041932603289
  35. Keith Vaux, MDSonoma, CA 954761740238104
  36. Moin Vera, M.D., PHDLos Angeles, CA 900271891995122
  37. Hua Wang, M.DSan Bernardino, CA 924081467890632
  38. John Waterson, M.D., PH.D.Oakland, CA 946091578505467
  39. Valerie Watiker, M.D.Tarzana, CA 913561497821763
  40. Ari Weinreb, M.D./PH.D.Los Angeles, CA 900731437261229
  41. Kristen Wigby, M.D.San Diego, CA 921231487920724
  42. Rosetta Willis Hassan, MDBellflower, CA 907061871660704
  43. Yael Wilnai Ziskind, MDPalo Alto, CA 943041548559974
  44. Laura WilsonOrange, CA 928681841794567
  45. David Witt, MDSan Jose, CA 951191700962214
  46. Derek Wong, M.D.Los Angeles, CA 900951134199946
  47. Jeremy Woods, MDMadera, CA 936361184041360
  48. Laura Workman, M.D.Sacramento, CA 958161184783177
  49. Changrui Xiao, M.D.Orange, CA 928681962815795
  50. Touran Zadeh, MDOrange, CA 928681811932940

Source: CMS NPPES, primary taxonomy 207SG0201X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 14 of 49 per resident

  1. Hawaii0.4
  2. South Carolina0.4
  3. Michigan0.4
  4. California0.4
  5. New York0.4
  6. Pennsylvania0.4
  7. 50 states and D.C.0.3

Source: CMS NPPES, primary taxonomy 207SG0201X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

55.0% of these records appear in a Medicare file, against 62.3% 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. California55.0%
  2. United States62.3%

Clinical Genetics (M.D.) Physician records in California, measured

  • In a Medicare file83 of 151 · 55.0% here, 62.3% nationally
  • In the CMS Doctors and Clinicians file58 · 38.4% here, 47.7% nationally
  • Not updated in five years or more73 · 48.3% here, 51.3% nationally
  • Median graduation year1999 · the 58 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207SG0201X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

151 NPPES records list clinical genetics (m.d.) physician (207SG0201X) as their primary taxonomy with a practice address in California: 0.4 per 100,000 residents against 0.3 nationally (50 states and D.C.). Los Angeles has 28 of them (19%).

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 York73
  2. Texas59
  3. Massachusetts56
  4. Ohio55

States with a similar rate per 100,000

  1. Michigan0.4
  2. South Carolina0.4
  3. Pennsylvania0.4
  4. Washington0.4

The largest states

  1. New York73
  2. Texas59
  3. Massachusetts56
  4. Ohio55
  5. Florida49

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.