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 260 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. Vijayanti Reddy, MDPanorama City, CA 914021912078957
  2. Alexander Redeagle, M.D., PH.D.Long Beach, CA 908221740546787
  3. Gregory Redmond, M.D.Sacramento, CA 958161790766087
  4. Sarah RedmondSan Francisco, CA 941431518549377
  5. Marcia Redwood, M.D.Oakland, CA 946021528295789
  6. Michael Ree, D.O.Moreno Valley, CA 925551952692287
  7. Danilo Reed, M.D.San Francisco, CA 941091598829319
  8. Diane Reed, M.D.Los Angeles, CA 900951881012995
  9. Jarred Reed, MDLos Angeles, CA 900951013250869
  10. Stewart ReedBurbank, CA 915051548680143
  11. David Reeder, M.D.Orange, CA 928681477937779
  12. Amikjit Reen, M.D.Ridgecrest, CA 935551720061112
  13. Ranjit Reen, M.D.Fremont, CA 945381568512432
  14. Nicholas Reese, M.DLos Angeles, CA 900951730455015
  15. Wendy Reeve, M.D.San Francisco, CA 941151982031597
  16. Oliver Neil Refugio, M.D., M.P.H.Sylmar, CA 913421144727355
  17. Kirsten Regalia, MDStanford, CA 943051710201215
  18. Maureen Regan, MDSonora, CA 953701477532273
  19. Soham Rege, MD, MPHSan Francisco, CA 941431871179523
  20. Adam Regelmann, MD, PHDHayward, CA 945451528264686
  21. Nicholas Regennitter, MDRohnert Park, CA 949281013591031
  22. Leevaneigh Reghunathan, M.D.Porterville, CA 932571295148328
  23. Sudha Reghunathan, M.D.Camarillo, CA 930101568518827
  24. Mark Reginato, M.D.Danville, CA 945061194884502
  25. Surakshya Regmi, M.D.Loma Linda, CA 923541942582267
  26. Amel Reguieg, M.D.Mission Hills, CA 913461881071033
  27. Ayesha RehmanBakersfield, CA 933061396598785
  28. Maham Rehman, MDFrench Camp, CA 952311427518422
  29. Zehra Rehman, M.DFresno, CA 937031679805402
  30. Tooba Rehman Jahangir, M.D.Sacramento, CA 958231326481458
  31. Sofiya Reicher, MDTorrance, CA 905021386840072
  32. Marcel Reichert, MDCampbell, CA 950081457438301
  33. Cheryl Reid, M.D.Pasadena, CA 911011730571555
  34. Eric Reid, DOFresno, CA 937011922568153
  35. James Reid, M.D.Merced, CA 953401083607022
  36. Kristen Reid, M.D.San Francisco, CA 941431699707265
  37. Tony Reid, M.DLa Jolla, CA 920931346323904
  38. Lynn Reilly, M.D.Sacramento, CA 958641134103765
  39. Terry Reimann, M.D.Tarzana, CA 913561326130840
  40. Jenna Reisler, MDPalo Alto, CA 943041922791904
  41. Jeanne Reisman, MDOakland, CA 946111134207913
  42. Robert Reiss, MDRolling Hills Estates, CA 902741588746150
  43. Scott Reiter, MDSanta Monica, CA 904051780641712
  44. Stephen Reitman, MDLa Mesa, CA 919411508836594
  45. Maria Relente-Santos, MDFontana, CA 923361437862232
  46. Allison Remesz, D.O.Los Gatos, CA 950321023255619
  47. Andrew Ren, MDLos Angeles, CA 900271346475928
  48. Casey Ren, MDStanford, CA 943051447888003
  49. Xing Ren, M.D.San Diego, CA 921081184658973
  50. Xiushui Ren, MDSan Francisco, CA 941211356373229

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.