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 244 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. Juan Penaloza Pacheco, MDVacaville, CA 956871851928121
  2. Alice Peng, M.D.Los Angeles, CA 900481790712305
  3. Mavis Peng, MDOrange, CA 928681922637966
  4. Theodore Peng, MDSan Francisco, CA 941431548722754
  5. Yu-Hung Peng, MDMartinez, CA 945531922298520
  6. Joel Pengson, MDMoreno Valley, CA 925571720018237
  7. Joshua Pengson, M.D.Riverside, CA 925181578925855
  8. Maneesh Penkar, M.D.Torrance, CA 905051639480247
  9. William Penman, MDWoodland Hills, CA 913671588735492
  10. Vinay Penmetcha, M.D.Sacramento, CA 958161619952199
  11. Brandon Penn, D.O.Redding, CA 960021295919504
  12. John PennerSanta Cruz, CA 950621356845341
  13. Dominic Pennisi, M.D.Lodi, CA 952401548703036
  14. Vincent Pennisi, MDStockton, CA 952041306375662
  15. James Penrose, DOBakersfield, CA 933011831258458
  16. Rafael Penunuri, M.D.Newport Beach, CA 926631831270362
  17. Donna Lea Pepito, M.D.Sacramento, CA 958171063769495
  18. Ronald Pepitone, M.D.Los Alamitos, CA 907201063489128
  19. Patricia Pepper, MD, MSC, FACPSan Diego, CA 921341003886508
  20. Maria Victoria Peralta, M.D.Orange, CA 928681982838058
  21. George Peredy, MDSanta Clara, CA 950511891872743
  22. Susan Pereira, M.D.American Canyon, CA 945031770510919
  23. Isira Perera, MBBS,MDFresno, CA 937201497068100
  24. Joseph Perera, MDAnaheim, CA 928041700866571
  25. Ashwin Peres-Da-Silva, MDSan Francisco, CA 941101083143390
  26. Margarita Pereyda, M.D.Costa Mesa, CA 926271154476174
  27. Carlos Perez, M.D.Folsom, CA 956301356341606
  28. Francisco Perez, M.D.Irvine, CA 926181841262763
  29. Hector Perez, MDKentfield, CA 949041972749455
  30. Kevin Perez, MD, MSSylmar, CA 913421821748898
  31. Madelyn PerezLos Angeles, CA 900331841827953
  32. Mario Perez, D.O.Fontana, CA 923351376747204
  33. Virginia Perez Andreu, MD PHDThousand Oaks, CA 913601710348628
  34. William Perez Morales, MDMoreno Valley, CA 925551649851320
  35. Juan Perez Quintana, MDSan Bernardino, CA 924041053930644
  36. Cherlyn Perez-Corral, MDTorrance, CA 905021225693146
  37. Ramon Perez-Egana Monge, M.D.Gridley, CA 959481720297906
  38. Rene Perez-Silva, MDLos Alamitos, CA 907201295763878
  39. Eliseo Perez-Stable, MDSan Francisco, CA 941431295792737
  40. Bradley Perkins, MDRedwood City, CA 940651376424747
  41. Shanti Perkins, M.D.San Carlos, CA 940701598844516
  42. Renuka Perla, M.DSunnyvale, CA 940861710183074
  43. John PerlegosSacramento, CA 958161881012334
  44. Andrew Perlman, M.D.Stanford, CA 943051255594768
  45. Monica Perlman, M.D.La Jolla, CA 920371780796235
  46. Daniella Perlroth, M.D.San Jose, CA 951241487825899
  47. Frank Perlroth, M.D.Palo Alto, CA 943011083764948
  48. James Peros, MDSouth San Francisco, CA 940801003978719
  49. Jared Perrin, MDGoleta, CA 931111386908341
  50. Khanh Perrin, MDBeverly Hills, CA 902111649459314

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.