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 56 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. Aaron HarriesSan Francisco, CA 941101437468824
  2. Andrea Harris, MDGrass Valley, CA 959451154439669
  3. Brian Harris, M.D.Los Angeles, CA 900171285687574
  4. Dawn Harris, M.D.Grass Valley, CA 959451235139189
  5. Douglas Harris, MDSan Rafael, CA 949031073697066
  6. Jennifer Harris, MDOakland, CA 946111003912015
  7. Travis Harris, M. D.Vallejo, CA 945891326081696
  8. Marita Harris-Naddell, M.D.Woodland Hills, CA 913671114346830
  9. David Harrison, M.D.Los Angeles, CA 900891104189000
  10. Melanie Hartenian, MDLos Angeles, CA 900151598384752
  11. Katherine Harter, M.D.Los Angeles, CA 900331861894917
  12. Phillip Harter, MDStanford, CA 943051982730834
  13. Douglas Hartman, MDOakland, CA 946111508081571
  14. Ethan HartmanLong Beach, CA 908131891372462
  15. Molly Hartrich, MD, MPHLos Angeles, CA 900331770930893
  16. Gregory Hartt, M.D.Redding, CA 960011972710895
  17. Allison Harvey, MDPlacerville, CA 956671063159184
  18. Richard Harvey, M.D.Markleeville, CA 961201023038924
  19. Daniel HarwoodOrange, CA 928681972298040
  20. Jaan HasanOakland, CA 946091144883075
  21. Genevieve Hasek, M.D.Torrance, CA 905051780848085
  22. Cyrus Haselman, MDFresno, CA 937211356877641
  23. Robert Hashemzadeh-Gargari, MDFresno, CA 937211386149367
  24. Brock Hashim, MDPalo Alto, CA 943041548766488
  25. Javad Hashmi, MDSan Leandro, CA 945781861710840
  26. Cory Hata, DOAnaheim, CA 928061508136847
  27. Mary Hatcher-Dewey, M.D.San Leandro, CA 945771407157522
  28. John Hatherley, M.D.Los Angeles, CA 900171164476883
  29. Maya Hattangady, MDMadera, CA 936381699815597
  30. Natalie Haugen, DOLa Jolla, CA 920371861078263
  31. Jo Hauser, MDSolvang, CA 934631376571695
  32. Mark Hauser, MDSanta Barbara, CA 931051447294301
  33. Richard Hausman, D.O.Colton, CA 923241922049113
  34. Andrew Hausted, MDLoma Linda, CA 923541538781265
  35. Katie Hawk, MDLos Angeles, CA 900331053874784
  36. John HawkinsBishop, CA 935141689061293
  37. Maximilian Hawkins, MDWest Hollywood, CA 900481053991125
  38. Karolina Hawn, MDSan Leandro, CA 945771447839816
  39. Noah Hawthorne, MD, MPHSan Francisco, CA 941431619219979
  40. Brenda Hayakawa, MDSan Dimas, CA 917731679527386
  41. Sawsawn Hayatdavoudi, M.DSan Jose, CA 951161265487649
  42. Kevin Hayavi, M.D.Encino, CA 914361295888022
  43. Korbin Haycock, M.D.Loma Linda, CA 923541669407888
  44. Stephen Hayden, MDLa Jolla, CA 920371578506879
  45. Joseph Hayek, MDSan Diego, CA 921031689801342
  46. Chelsea Hayman, MDSan Francisco, CA 941101922680032
  47. Jon Haynes, M.D.Sacramento, CA 958171023404498
  48. Matthew Healy, M.D.Los Angeles, CA 900331750568937
  49. Sean Heavey, MDSacramento, CA 958171720582018
  50. Claus Hecht, MDAnaheim, CA 928041861459190

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.