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 135 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. Zahid Iqbal, M.D.Sacramento, CA 958251497021968
  2. Wajiha Irshad, M.D.Fresno, CA 937201144537317
  3. John Irvine, MDEureka, CA 955011861598419
  4. Luke Irwin, MDSan Diego, CA 921031073208773
  5. George Isaac, MDLoma Linda, CA 923571982796348
  6. Dayna Isaacs, MDSacramento, CA 958171740840164
  7. Maya IsaacsohnOakland, CA 946121013476852
  8. Reese IsaacsonSan Pedro, CA 907311154765998
  9. Joel Isackson, MDSanta Monica, CA 904031285640680
  10. Karo Isagholian, M.D.Glendale, CA 912031326078528
  11. Armen Isaiants, M.D.North Hollywood, CA 916061659336964
  12. Joseph Iser, MDSoda Springs, CA 957281841403854
  13. George Ishak, M.DThousand Oaks, CA 913601790190825
  14. Kristina Ishihara, MDElk Grove, CA 957581376621029
  15. Elizabeth Iskander, M.D.Monrovia, CA 910161831382191
  16. Michael Iskander, MDLos Angeles, CA 900591104352608
  17. Arshia Islam, MDRoseville, CA 956611982776704
  18. Mimsa Islam, MDSan Jose, CA 951111588227474
  19. Nuzhat IslamSan Diego, CA 921031780334367
  20. Parvez Islam, MDRoseville, CA 956781477631109
  21. Moises Islas Alvarez, MDLos Angeles, CA 900221316625221
  22. Ousama Ismael, MDSan Bernardino, CA 924041740451079
  23. Mohamed Ismail, MDVictorville, CA 923951700809472
  24. Sasank IsolaBakersfield, CA 933081598247223
  25. Francisco Isolani, M.D.Oakland, CA 946021326185265
  26. Tamina Isolani-Nagarvala, D.O.Oakland, CA 946021093045288
  27. Manisha Israni-Jiang, M.D.San Francisco, CA 941431255535134
  28. Tammy Issa, MDBakersfield, CA 933061164088068
  29. Brandon Itagaki, M.D.Los Angeles, CA 900951013193101
  30. Dishaben Italiya, MDFresno, CA 937201154700540
  31. Anthony Iton, M.D.Oakland, CA 946071609961101
  32. Catherine Ituarte, MDSacramento, CA 958171477112084
  33. Margarita IvanovaLos Angeles, CA 900331497215727
  34. Kaushik IvaturiSacramento, CA 958191669733275
  35. Nicholas Iverson, M.D.San Francisco, CA 941101396130324
  36. Kevin Ivey, M.D.Huntington Beach, CA 926491467605139
  37. Kosuke Iwaki, M.D.Fresno, CA 937201386091585
  38. Shunpei Iwata, M.D.Pasadena, CA 911051396931309
  39. Mahima Iyengar, MDLos Angeles, CA 900891427635002
  40. Shanthi IyerCity Of Commerce, CA 900021053493577
  41. Usha Iyer, MDAnaheim, CA 928011811055668
  42. Ahmad Jabaiah, M.D.Los Angeles, CA 900331396122081
  43. Mohammad Jaber, MDLoma Linda, CA 923541225602063
  44. Marcia Jablon, MDPasadena, CA 911051477640332
  45. Jay Jablow, MDAnaheim, CA 928071689722563
  46. Mark Jabro, M.D.San Diego, CA 921011326058330
  47. Akil JacksonLong Beach, CA 908221356769327
  48. Blaine Jackson, M.D.Solana Beach, CA 920751518079565
  49. George Jackson, MDRichmond, CA 948011770517666
  50. Helen Jackson, MDSan Francisco, CA 941151235217878

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.