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 24 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. Coco Chen, MDWoodland Hills, CA 913671649347568
  2. David Chen, MDHuntington Beach, CA 926471588614648
  3. David Chen, M.D.Berkeley, CA 947051306160759
  4. Esther Chen, MDSan Francisco, CA 941431821037342
  5. Jeff Chen, DRBerkeley, CA 947051912973074
  6. Jerrica Chen, MDPanorama City, CA 914021679558324
  7. Joan ChenOakland, CA 946021437736154
  8. Kevin Chen, M.D.Anaheim, CA 928051497288823
  9. Liqun Chen, M.D.Hayward, CA 945451437543832
  10. Lisa Chen, M.D.Fontana, CA 923351861835928
  11. Peter Chen, MDTravis Afb, CA 945351558510248
  12. Quan Chen, MDSan Leandro, CA 945771174086029
  13. Richard Chen, MDSan Diego, CA 921201942377171
  14. Richard Chen, M.D.Mountain View, CA 940401952537771
  15. Stephanie Chen, M.D.Anaheim, CA 928061669634432
  16. Steven Chen, MDSan Gabriel, CA 917761386201259
  17. Lucia Chen-Luftig, M.D.San Francisco, CA 941091922022508
  18. Martin Chenevert, M.D.Santa Monica, CA 904041386678746
  19. Charles Cheng, M.D.Anaheim, CA 928051356384820
  20. Jonathan ChengVallejo, CA 945891669035283
  21. Theresa ChengSan Francisco, CA 941101578926929
  22. Tiffany ChengSan Francisco, CA 941431932561396
  23. Yian Cheng, M.D.Los Angeles, CA 900331124200837
  24. Yu Wen Cheng, MDColton, CA 923241114595337
  25. Steven Cherry, M.D.Loma Linda, CA 923541114199858
  26. Uli Chettipally, MDSouth San Francisco, CA 940801992884027
  27. Brian CheungSan Francisco, CA 941431730541574
  28. Christina Cheung, MDColton, CA 923241518527522
  29. Bradford Chew, MDJackson, CA 956421720191489
  30. Gordon Chew, MDVallejo, CA 945891861570699
  31. Teri Chew, M.D.San Mateo, CA 944031508032905
  32. Wil Chew, MDBaldwin Park, CA 917061023185949
  33. Karizma Chhabra, MDSan Diego, CA 921231760122436
  34. Somil Chheda, DOLos Angeles, CA 900151992265052
  35. Nak Chhiv, MDAnaheim, CA 928071669673547
  36. Charles Chiang, MDSan Diego, CA 921201982752713
  37. Elvin Chiang, DOColton, CA 923241194346106
  38. James Chiang, MDModesto, CA 953561619418050
  39. Pengta Chiang, M.D.Oceanside, CA 920561104892710
  40. William Chiang, M.D.Fresno, CA 937211417336165
  41. Alice Chiao, M.D.Stanford, CA 943051639201296
  42. Clayton ChiapuzioColton, CA 923241750887949
  43. Obiora Chidi, M.D.San Diego, CA 921031619364296
  44. Alan Chiem, MD, MPHSylmar, CA 913421477716967
  45. Diana Chien, DORancho Mirage, CA 922701083358626
  46. Emily ChienSan Leandro, CA 945771548750474
  47. Lynn Chien, MDSacramento, CA 958251083792576
  48. Richard Childers, M.D.San Diego, CA 921031902876220
  49. Kristopher Chiles, MDOakland, CA 946111154622884
  50. Mikaela Chilstrom, M.D.Los Angeles, CA 900331588805303

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.