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 39 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. Ju-En ThlickBaldwin Park, CA 917061386878262
  2. Carlton Thomas, M.D.San Diego, CA 921141205881398
  3. George Thomas, M.D.Arcadia, CA 910071649293150
  4. Tanya Thomas, M.D.Mission Hills, CA 913451437593720
  5. William Thurston, MDSan Jose, CA 951191407932908
  6. Nels Thygeson, M.D.San Rafael, CA 949011114189495
  7. Andrea Tieng, M.D.Rancho Cucamonga, CA 917301356528566
  8. Kirsten Tillisch, MDLos Angeles, CA 900951881614493
  9. George Tinawi, MDMountain View, CA 940401518127216
  10. Monica Tincopa, MDSan Diego, CA 921031356511729
  11. Sadha Tivakaran, MDSacramento, CA 958251720150543
  12. Lakshma Tiyyagura, MDStockton, CA 952031164527883
  13. Kosuke Tokunaga, M.D.Yuba City, CA 959911578571626
  14. Loc Ton, M.D.Sacramento, CA 958231407145436
  15. Alexander Tonthat, MD, MBAOroville, CA 959661124522784
  16. Anthony Tornay, M.D.Rancho Mirage, CA 922701316918642
  17. Natalie Torok, M.D.Stanford, CA 943051750336939
  18. James Torosis, M.D.Redwood City, CA 940621851477467
  19. Cara Torruellas, M.D.Sacramento, CA 958171336376342
  20. Joseph TothSacramento, CA 958171376120535
  21. Lisa Toy, M.D.Sylmar, CA 913421992975403
  22. Scott Trahms, MDSanta Rosa, CA 954031023192093
  23. Doan-Trang Tran, MDAnaheim, CA 928071336210319
  24. Hoan Tran, M.D.San Jose, CA 951161982876785
  25. Khoi Tran, MDCosta Mesa, CA 926271821076316
  26. Ky-Dieu Tran, MDFountain Valley, CA 927081952698946
  27. Timothy Tran, MDTorrance, CA 905051316164171
  28. Tram Tran, M.D.Santa Monica, CA 904041437187234
  29. Tu Tran, M.D.Huntington Park, CA 902551467466243
  30. Tu Tranvan, M.D.Rosemead, CA 917701376570184
  31. Joseph Traube, M.D.San Diego, CA 921211548371529
  32. James Trenbeath, MDLaguna Hills, CA 926531245209089
  33. Leo Treyzon, M.D.Beverly Hills, CA 902121740304203
  34. Huy Trinh, M.D.San Jose, CA 951161326041658
  35. Priyam Tripathi, M.D.Los Angeles, CA 900451235498361
  36. Kashyap Trivedi, MDOrange, CA 928681649307356
  37. Mayur Trivedi, MDSimi Valley, CA 930651629265046
  38. David Truong, M.D.Fountain Valley, CA 927081528090818
  39. Patrick Truong, M.D.West Covina, CA 917901326237819
  40. Chung-Jyi Tsai, MDLoma Linda, CA 923501871507343
  41. Franklin Tsai, M.D.La Jolla, CA 920371972780120
  42. Mark Tsai, M.D.Northridge, CA 913251962566950
  43. Matthew Tsai, M.D., PH.DSan Diego, CA 921031285051177
  44. Patricia Tsai, M.D.Newport Beach, CA 926631538100896
  45. Mark Tsuchiyose, M.D.Daly City, CA 940151063412195
  46. Raymond Tu, MDSan Jose, CA 951191114003621
  47. Rosemary Tu, M.D.La Mesa, CA 919421073680609
  48. Sanjeev Tummala, MDMountain View, CA 940401740499193
  49. Martha Turchyn-Mazuryk, MDWalnut Creek, CA 945961497821979
  50. Thomas Twaddell, M.D.San Francisco, CA 941311760751176

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.