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 10 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. Reza Allamehzadeh, M.DMission Viejo, CA 926911467606053
  2. Jeffrey Allan, MDCamarillo, CA 930101407870652
  3. Lao-Tzu Allan-Blitz, MDLos Angeles, CA 900951437653128
  4. Timothy W Allari, MDSanta Cruz, CA 950621013996370
  5. Nazima Allaudeen, MDSan Francisco, CA 941431568686285
  6. Clarence Allegakoen, M.D.Mountain View, CA 940401205909637
  7. Patricia Allemann, M.D.Palo Alto, CA 943061265524433
  8. Anthony Allen, M.D.Berkeley, CA 947041104846054
  9. David Allen, MDManteca, CA 953371306924212
  10. David Allen, M.D.Sonora, CA 953701184687535
  11. Douglas Allen, M.D.Huntington Beach, CA 926481669893962
  12. Georgia Allen, DOVallejo, CA 945901508844796
  13. James Allen, D.O.San Ramon, CA 945831902099518
  14. Leigh Allen, MDSan Francisco, CA 941151548355118
  15. Michelle Allen, M.D.San Francisco, CA 941151679515688
  16. Patti Allen, M.D.Sunnyvale, CA 940861659438489
  17. Robert Allen, M.D.Glendale, CA 912021104212422
  18. Robert Allen, M.D.Sacramento, CA 958161770599706
  19. Scott Allen, M.D.Moreno Valley, CA 925551184681710
  20. Robin Alleyne, MD.Atascadero, CA 934221114957941
  21. Cynthia Alli, M.D.McClellan, CA 956521598741639
  22. Latifat Alli- Akintade, M.DSacramento, CA 958171275857211
  23. Charles Allison, M.D.San Francisco, CA 941171376541060
  24. Mark Allison, M.D.Riverside, CA 925061164471223
  25. Barry Allswang, MDLos Alamitos, CA 907201720016397
  26. Hector Almanzar-Ramos, MDLoma Linda, CA 923541326544958
  27. Mussie Almedom, MDStockton, CA 952101962576561
  28. Blanca Almeida, M.D.Long Beach, CA 908021508897760
  29. Remedios Almirante, M.D.Covina, CA 917231033314208
  30. David Almond, M.D.Redwood Valley, CA 954701295703833
  31. Ramy Alnahhal, M.D.Delano, CA 932151457599185
  32. Lamar Alocozy, MDRoseville, CA 957471194475350
  33. Mohammad Alocozy, MDSacramento, CA 958251821176538
  34. Wael Alomar, M.D.Hermosa Beach, CA 902541992884324
  35. Andrew Alongi, M.D.National City, CA 919501194838516
  36. Alberto Alonso, M.D.Huntington Park, CA 902551669621058
  37. David Alonso, MDChico, CA 959261467403246
  38. Edgardo AlonsoSacramento, CA 958171871243923
  39. Joseph Alonzo, M.D.Covina, CA 917231225077050
  40. Shirin Alonzo, MD, MPHBeverly Hills, CA 902111225318041
  41. Karine Aloyan, M.D.Mission Hills, CA 913451548919673
  42. Mehmet Alpas, M.D.Fresno, CA 937211356897680
  43. Lynne Alper, M.D.Berkeley, CA 947201619962107
  44. Michael Alper, M.D.Livermore, CA 945501801880505
  45. Harvey Alpern, MDSanta Monica, CA 904031235291741
  46. Joel Alpern, M.D.Ventura, CA 930031942411657
  47. Leila Alpers, M.D.San Francisco, CA 941331881706935
  48. Zenen Alpuerto, MDAntioch, CA 945311548215478
  49. Ahmed Alqaysi, MDFresno, CA 937201861995813
  50. Wufaa Alrashid, MDPasadena, CA 911051053516963

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.