NPPES file of Aug 9, 2026

Emergency Medicine Physician in California

7,751 NPPES records list emergency medicine physician with a practice address in California, 20 per 100,000 residents, the 28th 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 154 of 156.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207P00000X · 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, 632

  1. Los Angeles632
  2. San Diego496
  3. Sacramento369
  4. San Francisco289
  5. Oakland247

Emergency Medicine Physician records in California

  1. Stephanie YoungColton, CA 923241417341470
  2. Timothy Young, M.D.Loma Linda, CA 923541134249196
  3. Ting Young, MDFontana, CA 923351598814873
  4. Scott Youngquist, MDLong Beach, CA 908061134168701
  5. Carl Youngs, MDSan Diego, CA 921031598142218
  6. Dania Youssef, DORedlands, CA 923731780069021
  7. Mark Youssef, M.D.Victorville, CA 923951235188400
  8. Youssef Youssef, M.D.Fremont, CA 945381316958143
  9. Arthur Youssefian, MDPanorama City, CA 914021760615173
  10. Alfred Yu, M.D.Simi Valley, CA 930651467495887
  11. Edward Yu, DOAntioch, CA 945311740868199
  12. Elaine Yu, DOSan Diego, CA 921031528564150
  13. Jennifer Yu, MDSacramento, CA 958231669137212
  14. Kenneth Yu, M.D.San Mateo, CA 944011194996108
  15. Louis Yu, M.D.San Leandro, CA 945771619362035
  16. Lynda Yu, MDSacramento, CA 958251336532985
  17. Scott Yu, M.D.Emeryville, CA 946081780612556
  18. Stanley Yu, MDWoodland Hills, CA 913671750458683
  19. Yen-Hua Yu, D.O.Pleasanton, CA 945881134356868
  20. Tony Yuan, M.DSan Jose, CA 946081033156740
  21. Ivan Yue, MDSan Diego, CA 921341316568140
  22. Ho-Wang Yuen, MDColton, CA 923241275744369
  23. Sasha Yusem, DOUkiah, CA 954821982308896
  24. Todd Zaayer, M.D.Oceanside, CA 920561184618738
  25. Sybil Zachariah, M.D.Stanford, CA 943051508202094
  26. Eric Zacharias, M.D.Fortuna, CA 955401386793826
  27. Vian Zada, MDPasadena, CA 911051578142170
  28. Mordehai Zadik, M.D.Rohnert Park, CA 949281548204761
  29. Romik Zadorian, MDEncino, CA 914361205970696
  30. Ken Zafren, MDStanford, CA 943051366466120
  31. Steven Zahller, M.D.San Diego, CA 921031861428591
  32. Terry Zahniser, NPSacramento, CA 958161205976198
  33. Brita Zaia, M.D.Oakland, CA 946021285871798
  34. Syed Mohsin Shamim ZaidiEl Monte, CA 917331225480932
  35. John Zambetti, M.D.Lancaster, CA 935341275639379
  36. Tara Zand, MDOrange, CA 928681053870824
  37. Stephen Zanoni, M.D.Chula Vista, CA 919101750585535
  38. Susan Zapalac, DOSanta Barbara, CA 931051316986102
  39. Roberto Zappacosta, M.D.Valencia, CA 913551700811742
  40. Rodolfo Zaragoza, M.DRoseville, CA 956611952329898
  41. Ignacio Zarate, MDAnaheim, CA 928011366481889
  42. Stefanie Zarfoss, M.D.Modesto, CA 953561144517392
  43. Jerome Zarraga, D.O.Santa Monica, CA 904041346697893
  44. Nicole Zawada, MDOceanside, CA 920561366903486
  45. Frank Zazueta, M.D.Eureka, CA 955011386670230
  46. John Zecherle, M.D.Greenbrae, CA 949041598787871
  47. Frank Zeidan, MDFremont, CA 945381316077332
  48. Lara Zekar, MDSacramento, CA 958171194392969
  49. Neil Zelin, MDOakland, CA 946091437117710
  50. Beth Zelonis-Shou, MDSan Diego, CA 921031558517375

Source: CMS NPPES, primary taxonomy 207P00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 28 of 51 per resident

  1. Montana21
  2. Arizona20
  3. Kentucky20
  4. California20
  5. Virginia20
  6. North Carolina19
  7. 50 states and D.C.21

Source: CMS NPPES, primary taxonomy 207P00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

80.9% of these records appear in a Medicare file, against 81.5% 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. California80.9%
  2. United States81.5%

Emergency Medicine Physician records in California, measured

  • In a Medicare file6,272 of 7,751 · 80.9% here, 81.5% nationally
  • In the CMS Doctors and Clinicians file4,561 · 58.8% here, 58.7% nationally
  • Not updated in five years or more4,610 · 59.5% here, 54.8% nationally
  • Median graduation year2011 · the 4,560 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207P00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

7,751 NPPES records list emergency medicine physician (207P00000X) as their primary taxonomy with a practice address in California: 20 per 100,000 residents against 21 nationally (50 states and D.C.). Los Angeles has 632 of them (8%).

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 York5,025
  2. Texas4,885
  3. Florida4,034
  4. Pennsylvania3,911

States with a similar rate per 100,000

  1. Virginia19.8
  2. Kentucky20.0
  3. Arizona20.1
  4. North Carolina19.3

The largest states

  1. New York5,025
  2. Texas4,885
  3. Florida4,034
  4. Pennsylvania3,911
  5. Illinois3,291

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.