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 6 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. Michael Chang, M.D.San Diego, CA 921031114155488
  2. Patrick Chang, MDLos Angeles, CA 900331750885307
  3. Stanley Chang, M.D.Fresno, CA 937021013936566
  4. Suyi Chang, MDWalnut Creek, CA 945961972681468
  5. Yu-Ming Chang, M.D., PH.D.Fremont, CA 945391760659866
  6. Andrew Chao, M.D.Sacramento, CA 958171740570514
  7. Daniel Chao, M.D.Loma Linda, CA 923571316144488
  8. David Chapman, M.D.Yorba Linda, CA 928861053321943
  9. Paul Chard, MD PHDOakland, CA 946121427006006
  10. Prista Charuworn, MDStanford, CA 943051003002221
  11. Om Chaurasia, MDMission Viejo, CA 926911528136702
  12. Gaurang Chaurushia, MDDowney, CA 902411538126131
  13. Charles Chaya, M.D.Riverside, CA 925051760438873
  14. Kendrick Che, DOLoma Linda, CA 923541326251844
  15. Haritha Chelimilla, M.D.Escondido, CA 920251528235892
  16. Pundari Chemitiganti, M.D.Huntington Beach, CA 926481033123971
  17. Adam Chen, MDRiverside, CA 925051821160300
  18. Ann Chen, MDStanford, CA 943051003840307
  19. Beverly Chen, M.D.Redondo Beach, CA 902771154622454
  20. Christina Chen, M.D., PH.D.Hacienda Heights, CA 917451356425516
  21. Ellie Chen, MDTorrance, CA 905051417485350
  22. Frederick Chen, MDFreedom, CA 950191962539585
  23. Jaime Chen, MDLos Angeles, CA 900341619037892
  24. Jennifer Chen, MDSan Francisco, CA 941431376771758
  25. Joe Chen, M.D.Los Alamitos, CA 907201700817350
  26. Joseph Chen, M.D.San Francisco, CA 941431558500603
  27. Kay ChenSan Diego, CA 921611811429079
  28. Philip Chen, MDRiverside, CA 925061073796728
  29. Tien-Chun Chen, MDTemple City, CA 917801396005450
  30. Timothy Chen, M.D.San Francisco, CA 941151699017707
  31. Vida ChenModesto, CA 953551922480789
  32. Wei-Chung Chen, MDLos Angeles, CA 900331699066381
  33. William ChenSan Diego, CA 921231366837890
  34. William Chen, M.D.Roseville, CA 956611982744942
  35. Derek Cheng, MDLos Angeles, CA 900481093928160
  36. Fong Kuei Cheng, M.D.Chico, CA 959281922275874
  37. Huilan Cheng, M.D.Berkeley, CA 947051679684245
  38. Steve Cheng, MDWalnut Creek, CA 945981245318328
  39. Tony Cheng, MDSan Diego, CA 921111629698923
  40. Rekha Cheruvattath, MDSacramento, CA 958231891779740
  41. Nagaraj Chetty, MDVan Nuys, CA 914051508975293
  42. Eddie Cheung, MDOakland, CA 946071255305447
  43. Ramsey Cheung, MDPalo Alto, CA 943041750394532
  44. Rahul Chhablani, MDLos Angeles, CA 900491376799395
  45. Hellen Chiao, MDOceanside, CA 920561154681435
  46. Mai-Ching Chien, M.D.Hemet, CA 925431053322701
  47. Alan Chin, MDSan Jose, CA 951191750467262
  48. Matthew Chin, M.D.Walnut Creek, CA 945971629397351
  49. Stefan Chin, MDDaly City, CA 940151891794152
  50. Charlotte Ching, MDSan Francisco, CA 941151407475312

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.