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 23 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. Cameron Locke, MDSan Leandro, CA 945771386006641
  2. Ian Logan, M.D.Davis, CA 956161164572186
  3. George Longstreth, MDSan Diego, CA 921201285793869
  4. Alejandro LopezSan Francisco, CA 941431578190724
  5. Oscar Lopez, MDBrawley, CA 922271205034733
  6. Mark Lott, M.D.Inglewood, CA 903011821192139
  7. Michael Loudin, M.D.Berkeley, CA 947021932542156
  8. Justin Louie, M.D.San Francisco, CA 941151518351683
  9. Eric Low, M.D., M.P.H.San Diego, CA 921031245761766
  10. Anson Lowe, M.D.Stanford, CA 943051922165406
  11. Sarina Lowe, MDLos Angeles, CA 900951821592379
  12. Andrew Lu, M.D.Fremont, CA 945381912197393
  13. Frances Lu, MDSanta Rosa, CA 954051942445374
  14. Shelly Lu, M.D.Los Angeles, CA 900331386673606
  15. Timothy Lu, M.D., PH.D.San Francisco, CA 941431922258169
  16. Daniel Luba, M.D.Gonzales, CA 939261790786002
  17. Shih-Lin Lue, M.D.Monterey Park, CA 917541992895346
  18. John Lunn, MDLos Angeles, CA 900951588683437
  19. Lawrence Lusk, MDSouth San Francisco, CA 940801144308750
  20. Alexander Lustberg, M.D.Santa Rosa, CA 954051225009301
  21. Brant Lutsi, M.D.Woodland, CA 956951265608186
  22. Kip Lyche, MDVentura, CA 930031811927981
  23. John Lyons, M.D.San Diego, CA 921281417156068
  24. Averil Ma, M.D.San Francisco, CA 941431336250141
  25. Gene Ma, M.D.San Jose, CA 951191316238579
  26. James Ma, MDRiverside, CA 925051295802007
  27. Steven Ma, MDSan Diego, CA 921231730715715
  28. Brock Macdonald, M.D.San Francisco, CA 941171689901506
  29. Gustavo Machicado, MDNorthridge, CA 913251568434652
  30. Anand Madan, M.D.Roseville, CA 956611366418006
  31. Bahar Madani, MDLa Jolla, CA 920371730356106
  32. Sethu Madhavan, MDLancaster, CA 935341194732230
  33. Michael Madievsky, MDTarzana, CA 913561982696613
  34. Glenn Madokoro, M.D.Newport Beach, CA 926631639255060
  35. Kalyani Maganti, M.D.Concord, CA 945201073533212
  36. Pooja MagaviSan Diego, CA 921341912494402
  37. Uma Mahadevan, MDSan Francisco, CA 941151851355283
  38. Anmol Mahal, M.D.Fremont, CA 945381609931526
  39. Jacquelyn Maher, MDSan Francisco, CA 941101457454951
  40. Sarah Maher, M.D.Rancho Mirage, CA 922701609253475
  41. Sohan Mahil, M.D.Stockton, CA 952091427115211
  42. Michael Mahoney, MDAuburn, CA 956021497881965
  43. Hugh Mai, M.D.San Jose, CA 951121710921903
  44. Stephanie Mai, M.D.Sacramento, CA 958161841610862
  45. Zenowij Majuk, MDSanta Cruz, CA 950651851376297
  46. Man-Siak Mak, MDMerced, CA 953401609875004
  47. Ranjit Makar, MDSan Jose, CA 951191083858997
  48. Marc Makhani, M.D.Los Angeles, CA 900481710156476
  49. Ariel Malamud, MDLos Angeles, CA 900151518032218
  50. Stephanie Maldonado, MD, SCMSan Francisco, CA 941431558998757

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.