NPPES file of Aug 9, 2026

Gastroenterology Physician in California

2,140 NPPES records list gastroenterology physician with a practice address in California, 5.5 per 100,000 residents, the 25th highest rate of 51. Los Angeles and San Diego have the most; each record links to the provider's NPI and the California license search. Page 33 of 43.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RG0100X · 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, 195

  1. Los Angeles195
  2. San Diego125
  3. San Francisco103
  4. Sacramento90
  5. Stanford70

Gastroenterology Physician records in California

  1. Frederick Rowe, M.D.San Ramon, CA 945831215927405
  2. Eric Rowen, M.D.Pleasanton, CA 945881891883583
  3. Abhik Roy, M.D.Berkeley, CA 947051235455882
  4. Joshua Rubin, M.D.San Diego, CA 921031255610416
  5. Paul Rubinstein, M.D.Palo Alto, CA 943011316051733
  6. Vivek Rudrapatna, M.D., PH.D.San Francisco, CA 941151255750741
  7. Atenodoro Ruiz, MDSanta Clara, CA 950511154408003
  8. Bruce Runyon, M.D.Loma Linda, CA 923541164449849
  9. Robert Ruskin, MDPalo Alto, CA 943011316159932
  10. Tarun Rustagi, M.D.San Francisco, CA 941091801045513
  11. James Ryan, M.D.San Francisco, CA 941211245310275
  12. Sammy Saab, MDLos Angeles, CA 900241720008899
  13. Carlos Saad, MDSanta Ana, CA 927051932133667
  14. Mohammed Saadi, M.D.La Mesa, CA 919421245591387
  15. Kiran Sachdev, MDOrange, CA 928681518064120
  16. Mamatha Sadda, M.D.Los Angeles, CA 900481255412854
  17. Angizeh Sadeghi, MDNewport Beach, CA 926601538211917
  18. Javed Sadiq, M.D.Santa Ana, CA 927041609194703
  19. Brett Sadowski, M.D.San Diego, CA 921301669810701
  20. Bassam Saffouri, MDLos Gatos, CA 950321992758973
  21. George Saffouri, MDRedlands, CA 923731962766907
  22. Dipti Sagar, MDVentura, CA 930031558642751
  23. Syed Mohsin SaghirCovina, CA 917221225569494
  24. Ara Sahakian, M.D.Los Angeles, CA 900331801018478
  25. Bruce Sahba, M.D.Fresno, CA 937011134239957
  26. Scott Sainburg, M.D.Fullerton, CA 928351184610552
  27. Mannat Saini, MDCosta Mesa, CA 926271063918431
  28. Surinder Saini, M.D.Newport Beach, CA 926601750304671
  29. Takeshi Saito, M.D., PHDLos Angeles, CA 900331629399076
  30. Mark SalemOrange, CA 928681821356254
  31. Suhail Salem, M.D.Northridge, CA 913251750547030
  32. Mehrdad Saliminejad, M.D.Long Beach, CA 908081891934832
  33. Rebecca Salvo, DOSanta Barbara, CA 931051457886566
  34. Jason Samarasena, M.D.Orange, CA 928681629253364
  35. Paul Sanchez, M.D.Oxnard, CA 930301336156207
  36. William Sandborn, M.D.San Diego, CA 921031639157563
  37. Paul Sanders, MDThousand Oaks, CA 913601629044748
  38. Kuldip Sandhu, MDCarmichael, CA 956081346380359
  39. Sukhwinder Sandhu, MDFremont, CA 945361063456457
  40. Sunny Sandhu, MDStanford, CA 943051013413913
  41. Roger Sands, MDStanford, CA 943051659799088
  42. Claudia Sanmiguel, M.D.Santa Monica, CA 904041144474610
  43. Michael Santoro, M.D.Mission Viejo, CA 926911396722435
  44. Stephanie Santos, MDOakland, CA 946111225169246
  45. Armine Sarkisian, M.D.Glendale, CA 912021346429339
  46. Saranya Sasidharan, M.D.Fresno, CA 937011780020123
  47. Kareem Sassi, M.D.Los Angeles, CA 900951164723839
  48. Tohru Sato, MDSan Carlos, CA 940701497847248
  49. James Sattler, MDTorrance, CA 905051982693164
  50. Jenny SaukLos Angeles, CA 900951376703280

Source: CMS NPPES, primary taxonomy 207RG0100X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 25 of 51 per resident

  1. Colorado5.7
  2. Hawaii5.6
  3. South Carolina5.6
  4. California5.5
  5. Michigan5.5
  6. Arizona5.4
  7. 50 states and D.C.6.2

Source: CMS NPPES, primary taxonomy 207RG0100X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

83.1% of these records appear in a Medicare file, against 84.4% 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. California83.1%
  2. United States84.4%

Gastroenterology Physician records in California, measured

  • In a Medicare file1,779 of 2,140 · 83.1% here, 84.4% nationally
  • In the CMS Doctors and Clinicians file1,538 · 71.9% here, 73.7% nationally
  • Not updated in five years or more1,280 · 59.8% here, 55.6% nationally
  • Median graduation year2002 · the 1,538 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RG0100X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

2,140 NPPES records list gastroenterology physician (207RG0100X) as their primary taxonomy with a practice address in California: 5.5 per 100,000 residents against 6.2 nationally (50 states and D.C.). Los Angeles has 195 of them (9%).

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 York1,797
  2. Florida1,513
  3. Texas1,478
  4. Pennsylvania1,049

States with a similar rate per 100,000

  1. Michigan5.5
  2. Arizona5.4
  3. Indiana5.4
  4. Vermont5.4

The largest states

  1. New York1,797
  2. Florida1,513
  3. Texas1,478
  4. Pennsylvania1,049
  5. Illinois887

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.