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 119 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. Jon Roper, M.D.Los Angeles, CA 900171558758763
  2. Jose Rosa, MDSacramento, CA 958231841610136
  3. Andrew RosalesLos Angeles, CA 900331568043305
  4. Santano Rosario, MDLos Angeles, CA 900951780143560
  5. James Rosbrugh, M.D.Bakersfield, CA 933111184603417
  6. Christian Rose, MDStanford, CA 943051710321062
  7. Emily Rose, M.D.Loma Linda, CA 923541972799625
  8. John Rose, M.D.Sacramento, CA 958171093799264
  9. Radford Rosebrough, M.D.San Gabriel, CA 917761093762254
  10. Gregory Rosellini, M.D.Elk Grove, CA 956241942224092
  11. Brett Rosen, M.D.Harbor City, CA 907101205129855
  12. Matthew RosenLos Angeles, CA 900241033503347
  13. Veronica Rosen, MDLos Angeles, CA 900151710625496
  14. John Rosenberg, MDRedwood City, CA 940631558449199
  15. Robert Rosenbloom, M.D.Culver City, CA 902321235137712
  16. Jillian Rosenblum, M.D.Oakland, CA 946091508246786
  17. Jonathan Rosenson, MDOakland, CA 946111467605972
  18. Monica Rosenthal, MDSan Ramon, CA 945831295783744
  19. Robert Rosenthal, MDDavis, CA 956161871601310
  20. Shahin Roshanzaer, DOAnaheim, CA 928071770631582
  21. Keith Rosing, MDIrvine, CA 926031942251921
  22. Diane Rosonke, MDFresno, CA 937011861666067
  23. Steve Rosonke, MDVisalia, CA 932911083659155
  24. Benjamin Ross, MDNational City, CA 919501366077471
  25. Catherine Ross, M.D.Inglewood, CA 903011063651586
  26. Charles Ross, M.D.San Francisco, CA 941091649372582
  27. Dennis Ross, MDFullerton, CA 928351659309425
  28. Ethan Ross, MDLos Angeles, CA 900271780848507
  29. Jaron Ross, M.D.Emeryville, CA 946081316146129
  30. Katherine Ross, MDLos Angeles, CA 900331013411222
  31. Richard RossSan Jose, CA 951281184069650
  32. David Rossi, M.D.San Francisco, CA 941331588614077
  33. John Rossi, MDWalnut Creek, CA 945961437237518
  34. Daniel RossieLoma Linda, CA 923541124552385
  35. Martin Rossip, M.D.Merced, CA 953481083010714
  36. Lorca Rossman, MDOakland, CA 946111417035213
  37. Rebecca Rossner, MDVallejo, CA 945891912085754
  38. Kelly Roszczynialski, M.D.Stanford, CA 943051033596614
  39. Ryan Roten, D.O.Colton, CA 923241760792717
  40. Daniel Roth, MDMoreno Valley, CA 925551265176788
  41. David Roth, MDWalnut Creek, CA 945961598843161
  42. Kathleen Roth, MDOakland, CA 946111497833289
  43. Robert Roth, MDBerkeley, CA 947051033649579
  44. Ronald Rothenberg, M.D.Encinitas, CA 920241487654844
  45. Robert Rothstein, MDOakland, CA 946021750317988
  46. Edward Rotunda, M.D.Oceanside, CA 920561083600126
  47. Amir Rouhani, M.D.Los Angeles, CA 900951720244536
  48. Kyle Rourke, MDEl Centro, CA 922431851928386
  49. Jenna Rousseau, MDSan Leandro, CA 945771376107565
  50. Robert Rouzier, MDWest Covina, CA 917901124065289

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.