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 266 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. Darius Roohani, MDParamount, CA 907231124607379
  2. Haleh Roohipour, M.D.Beverly Hills, CA 902121922026897
  3. Shahab Roohparvar, M.D.Mountain View, CA 940401588711311
  4. Carlin Rooke, M.D.Sylmar, CA 913421235303579
  5. Gretchen Rooker, MDMountain View, CA 940411114004066
  6. Matthew Roosevelt, M.D.San Diego, CA 921201003142985
  7. Henry Roque, MDSan Bruno, CA 940661821176595
  8. Rennie Roque, MDAntioch, CA 945311356493167
  9. Ronaldo Roque, M.D.Long Beach, CA 908041932397189
  10. Gilbert Rosales, M.D.Panorama City, CA 914021972529345
  11. Salvador Rosales, MDLos Angeles, CA 900151366901589
  12. Carolann Rosario, MDLoma Linda, CA 923571801997820
  13. Jose Rosas, M.D.San Francisco, CA 941101699811323
  14. Macrina Rosas RosasOrange, CA 928691972290625
  15. Antoinette Rose, M.DMountain View, CA 940401861409724
  16. John Rose, MDStanford, CA 943051982280442
  17. Logan Rose, M.D.Woodland Hills, CA 913641962575456
  18. Mark Rose, MDLong Beach, CA 908131780424861
  19. Theodore Rose, MDGarden Grove, CA 928401629088281
  20. Allen Rosen, MDHarbor City, CA 907101982756342
  21. Daniel Rosen, MDCalabasas, CA 913021801170519
  22. Dina Rosen, M.D.Alameda, CA 945011821047184
  23. Harry Rosen, M.D.West Hills, CA 913071669448429
  24. Jared RosenSacramento, CA 958171972062735
  25. Shawn Rosen, M.D.Pleasant Hill, CA 945231386887974
  26. Susan Rosen, M.D.San Francisco, CA 941431750502415
  27. Linda Rosenband, M.D.Santa Clara, CA 950511063636579
  28. Arieh RosenbaumSan Francisco, CA 941151699866640
  29. Debra Rosenberg, M.D.San Diego, CA 921611164658894
  30. Oren RosenbergSan Francisco, CA 941431558560664
  31. Adam Rosenblatt, MDSan Francisco, CA 941181598776650
  32. Sophia Rosenmoss, MDLos Angeles, CA 900951992455166
  33. Alan Rosenstein, MDSan Francisco, CA 941181659092856
  34. Frida Rosenstein, M.D.Van Nuys, CA 914051740301142
  35. Norman Rosenstock, M.D.Palo Alto, CA 943031851654461
  36. Alan Rosenthal, DOSalinas, CA 939071174606818
  37. Anne Rosenthal, MDSan Francisco, CA 941151396862769
  38. Ellen Rosenthal, MDSan Rafael, CA 949011609948231
  39. Melissa Rosenthal, MDLos Angeles, CA 900271841359585
  40. Philip Rosenthal, MDSan Francisco, CA 941101154339786
  41. Rollie Rosete, MDTracy, CA 953771801838610
  42. Alan Ross, MDSanta Ana, CA 927071699839332
  43. Andrew Ross, M.D.Berkeley, CA 947051710919931
  44. Marvin Ross, M.D.Lancaster, CA 935361659408227
  45. Naomi Ross, MDSacramento, CA 958161184914913
  46. Samuel Ross, M.D.Beverly Hills, CA 902111689917486
  47. Stephanie RossOrinda, CA 945631699119081
  48. John Rossettie, M.D.San Diego, CA 921031578908372
  49. Marie RossiMather, CA 956551922503408
  50. Rita Rossi-FoulkesLos Angeles, CA 900481427011709

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.