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 17 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. Yejoo JeonRedwood City, CA 940631851851679
  2. Jenny Jew, M.D.Antioch, CA 945091356504476
  3. Ritesh Jha, M.D.Fremont, CA 945381972684645
  4. Manan Jhaveri, MDSacramento, CA 958231306285739
  5. Yan Jiang, MDStanford, CA 943051831585595
  6. Yi Jiang, MDStanford, CA 943051366946345
  7. Won-Seok Jo, M.D.San Bernardino, CA 924081245215144
  8. Piyush Jogani, MDNorthridge, CA 913251730197609
  9. Gregory Johnson, MDThousand Oaks, CA 913601952463762
  10. Mark Johnson, M.D.Chula Vista, CA 919101861421372
  11. R Johnson, M.D.San Diego, CA 921231548272446
  12. Sheeva JohnsonSacramento, CA 958231326434200
  13. Steven Johnson, M.DSalinas, CA 939011265439038
  14. Gavin Jonas, MDAnaheim, CA 928071740351725
  15. Barbara Jung, M.D.San Diego, CA 921031205869062
  16. Rome Jutabha, M.D.Los Angeles, CA 900331790785434
  17. Sitaraman Jyotheeswaran, M.D.Anaheim, CA 928011952469272
  18. Magdalena Kaczynska, MDSeaside, CA 939551033206438
  19. Mark Kadden, M.D.Escondido, CA 920251093784597
  20. Adriena Kajdos, M.D.Eureka, CA 955011699725325
  21. Ishaan Kalha, MDBakersfield, CA 933091295711539
  22. Denise Kalmaz, M.D.San Diego, CA 921031275700973
  23. Tejinder Kalra, M.D.Los Gatos, CA 950321174564033
  24. Lori Kam, M.D.Tarzana, CA 913561144305244
  25. Nathan Kam, M.D.San Leandro, CA 945771598843351
  26. Sam Kam, M.D., PH.D.Hacienda Heights, CA 917451558451815
  27. Wing Kam, M.D., PH.D.San Francisco, CA 941181003964826
  28. Ahmad Kamal, MDSan Jose, CA 951281598703787
  29. Amrit Kamboj, MDWest Hollywood, CA 900481700240355
  30. Jan Kamler, MDMonterey, CA 939401093791824
  31. Rokay Kamyar, M.D.La Mesa, CA 919421770572109
  32. Vikram Kanagala, M.DRancho Mirage, CA 922701407000748
  33. Kevin KaneOakland, CA 946121396109914
  34. Marc Kaneshiro, M.D.West Hollywood, CA 900481083865836
  35. Jimmy Kang, MDBaldwin Park, CA 917061427106236
  36. Ravi Kankotia, M.D.Newport Beach, CA 926631275996613
  37. Rasik Kansara, M.D.San Jose, CA 951161063461747
  38. Danny Kao, MDGreenbrae, CA 949041396709796
  39. James Kao, MDMurrieta, CA 925631760645121
  40. Roger Kao, M.D.San Carlos, CA 940701982786133
  41. Vincent Kao, DOFountain Valley, CA 927081649570268
  42. Yagya Kapila, MDFremont, CA 945381801955026
  43. Ashwani Kapoor, MDSacramento, CA 958161033370788
  44. Ani Kardashian, M.D.Los Angeles, CA 900331982040259
  45. Ara Kardashian, M.D.Encino, CA 914361265703102
  46. William Karnes, MDOrange, CA 928681881652998
  47. Nicholas Karyotakis, MDLos Angeles, CA 900671922072826
  48. John Kasher, M.D.Burbank, CA 915051285723304
  49. Priya Kathpalia, M.D.San Francisco, CA 941151194046821
  50. William Katkov, M.D.Santa Monica, CA 904041386693646

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.