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 23 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. Eileen ChangTorrance, CA 905031376746644
  2. Emile Chang, M.D.Los Angeles, CA 900251437392909
  3. Hsu-Hsiang Chang, D.O.Pomona, CA 917671932546603
  4. Ivy Chang, M.D.Gardena, CA 902471891182374
  5. Jamie Chang, M.D., M.B.ALos Angeles, CA 900341750692448
  6. Jennifer Chang, DOOakland, CA 946111083829485
  7. Karen Chang, MDLynwood, CA 902621023026242
  8. Kit Chang, M.D.Los Angeles, CA 900951285900464
  9. Rita Chang, MDBanning, CA 922201871951798
  10. Timothy Chang, M.D.Panorama City, CA 914021265757819
  11. Winnie ChangFontana, CA 923351316139405
  12. Alice Chao, MDStanford, CA 943051104117043
  13. Christina Chao, M.D.Torrance, CA 905021396031662
  14. Denver Chao, M.D.Fresno, CA 937211235433285
  15. Janna Chao, MDBellflower, CA 907061043359748
  16. Kenny ChaoSanta Monica, CA 904041316444839
  17. Priscilla Chao, MDAlhambra, CA 918011487186425
  18. Tina Chao, MDLos Angeles, CA 900341639238207
  19. Weyjuin Chao, M.D.South El Monte, CA 917331154852218
  20. William Chao, MDBaldwin Park, CA 917061841348661
  21. James Chapman, DOLakewood, CA 907121689606790
  22. Michele Chapman, M.D.Corcoran, CA 932121376653758
  23. Michelle Charfen, M.D.Santa Monica, CA 904041588602486
  24. Anusha Chari, D.O.San Francisco, CA 941091720378912
  25. Carrie Charlton, M.D.Loma Linda, CA 923541891011847
  26. Alexander CharmozSalinas, CA 939011427403195
  27. Don Charoen, DOSan Diego, CA 921271720155542
  28. David Chase, M.D.Ventura, CA 930031700949757
  29. Philip Chase, M.D.Carmel, CA 939231841218112
  30. Paul Chasin, MDPleasanton, CA 945881649261959
  31. Louis Chau, M.D.Corona, CA 928821225144918
  32. Peter Chau, MDVallejo, CA 945891114960002
  33. Chris Chauhan, M.DCamarillo, CA 930101457634628
  34. Gary Chavez, MDOrange, CA 928681720096209
  35. Mark Chavez, MDLynwood, CA 902621487813150
  36. Patricio Chavez, M.DAntioch, CA 945091770502148
  37. Rafael Chavez, M.D.Los Angeles, CA 900331194120055
  38. Robert Chavez, MDTorrance, CA 905031902829187
  39. Valerie Chavez-FloresVallejo, CA 945891518616630
  40. Drew Chavinson, M.DSan Carlos, CA 940701114972684
  41. Daniel Chavira, MDPalos Verdes Estates, CA 902741053358127
  42. Hina Chawla, M.D.San Carlos, CA 940701043340573
  43. Kerlen Chee, M.D.South San Francisco, CA 940801447459177
  44. Mary Cheffers, MDLos Angeles, CA 900331588035745
  45. Anna Cheh, M.D.Los Angeles, CA 900671366471443
  46. Ai Xin ChenTorrance, CA 905021982231270
  47. Alexander Chen, DOFresno, CA 937211437851847
  48. Alice Chen, MDSan Diego, CA 921031427476597
  49. Berniece ChenFontana, CA 923351932729134
  50. Chuan-Jay Chen, MDSaint Helena, CA 945741205366457

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.