NPPES file of Aug 9, 2026

Internal Medicine Physician in California

17,696 NPPES records list internal medicine physician with a practice address in California, 45 per 100,000 residents, the 17th highest rate of 51. Los Angeles and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 40 of 354.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · 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, 1,423

  1. Los Angeles1,423
  2. San Francisco1,318
  3. San Diego961
  4. Sacramento601
  5. Oakland432

Internal Medicine Physician records in California

  1. Barrett Bryan, MDRedwood City, CA 940621033133954
  2. Brittany Bryan, M.D.Santa Barbara, CA 931011104189315
  3. Burch Bryant, MDSacramento, CA 958231811075534
  4. Diana Bryant, MDLong Beach, CA 908151255425146
  5. Janie Bryant, MDBerkeley, CA 947041922176080
  6. Larry Bryson, M.D.Napa, CA 945581396833539
  7. David Buccigrossi, MDSan Diego, CA 921201275692857
  8. David Buch, MDPanorama City, CA 914021083781975
  9. John Buch, MDLos Angeles, CA 900341033267083
  10. Thomas Buchanan, M.D.Los Angeles, CA 900331003143991
  11. Susan Buchbinder, MDSan Francisco, CA 941101629183066
  12. Adam Buck, M.D.Martinez, CA 945531346564119
  13. Carl Buckhorn, M.D.Yorba Linda, CA 928861649264847
  14. Robert Buckingham, MDOjai, CA 930231023147675
  15. Sruthi Buddai, MDSan Diego, CA 921221346985793
  16. Catherine Buell, DOSanta Barbara, CA 931051699416230
  17. Benedict Buenviaje, MDPleasanton, CA 945881457401267
  18. Jessica Buesing, MDMenlo Park, CA 940251487159513
  19. Barry Bugatto, MDSan Francisco, CA 941151356429906
  20. Sara Qasim Bughio, M.DWalnut Creek, CA 945951578818787
  21. Carina Buhay, MDSan Bernardino, CA 924041639143530
  22. Brian BuiRiverside, CA 925011982108262
  23. Can Bui, MDSan Diego, CA 921151285717397
  24. Christine Bui, D.OFontana, CA 923351285095752
  25. Dana Bui, M.D.San Francisco, CA 941171235576141
  26. Diane Bui, D.O.Murrieta, CA 925631700077245
  27. Diep Bui, M.D.Long Beach, CA 908221477668119
  28. Giang BuiRed Bluff, CA 960801952663627
  29. Hong Bui, M.D.San Jose, CA 951211417944471
  30. James Bui, MDFolsom, CA 956301477631182
  31. Linsey BuiSacramento, CA 958231164107983
  32. Loc Bui, M.D.Westminster, CA 926831023081387
  33. Peggy Bui, MD MBASan Francisco, CA 941151598183790
  34. Stephanie Bui, MDLos Angeles, CA 900491609806744
  35. Mai-Khanh Bui-Duy, M.D.Watsonville, CA 950761275858409
  36. Nikola Bukurov, M.D.San Francisco, CA 941181861423279
  37. Mark Bulgarelli, DOSan Diego, CA 921131235162066
  38. Cecil Bullard, MDFresno, CA 937221407801046
  39. Alexander Bullen, M.D.San Diego, CA 921031528328531
  40. Kwi Bulow, M.D.San Diego, CA 921031073608576
  41. Michael Bunce, MDRohnert Park, CA 949281740369875
  42. Nelson Bunin, MDEmeryville, CA 946081508812363
  43. Teea Bunker, DOFort Irwin, CA 923101861020653
  44. Sara Bunting, MDMenlo Park, CA 940251639181381
  45. Michael Bunuan, DOSacramento, CA 958161538249495
  46. Jeffrey Burack, M.D.Oakland, CA 946091316967474
  47. Constanza Burciaga Calderoni, M.D.Loma Linda, CA 923541770016735
  48. Katherine Burck, M.D.Pleasanton, CA 945881487768719
  49. Jason Burge, DOOakland, CA 946111912191628
  50. Connie Burgeson, MDCameron Park, CA 956821396727145

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 17 of 51 per resident

  1. New Jersey50
  2. New Hampshire48
  3. Minnesota46
  4. California45
  5. Florida45
  6. Ohio45
  7. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

79.5% of these records appear in a Medicare file, against 78.7% 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. California79.5%
  2. United States78.7%

Internal Medicine Physician records in California, measured

  • In a Medicare file14,068 of 17,696 · 79.5% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file11,077 · 62.6% here, 61.4% nationally
  • Not updated in five years or more10,832 · 61.2% here, 55.4% nationally
  • Median graduation year2004 · the 11,065 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

17,696 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in California: 45 per 100,000 residents against 44 nationally (50 states and D.C.). Los Angeles has 1,423 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 York12,067
  2. Florida10,151
  3. Texas9,175
  4. Pennsylvania7,300

States with a similar rate per 100,000

  1. Minnesota45.9
  2. Ohio44.8
  3. New Hampshire48.0
  4. Maine42.8

The largest states

  1. New York12,067
  2. Florida10,151
  3. Texas9,175
  4. Pennsylvania7,300
  5. Illinois7,238

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.