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 24 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. Gurtej Malhi, M.DStockton, CA 952041174934897
  2. Krishan Malhotra, M.D.Pomona, CA 917671497831978
  3. Iftikhar Malik, M.D.Stockton, CA 952041548335185
  4. Vikram Malladi, MDGreenbrae, CA 949041902814015
  5. Niharika Mallepally, MD MPHNorth Hollywood, CA 916021679001333
  6. Angela Mallory, P.A.Sacramento, CA 958161144238296
  7. Sarathy Mandayam, MDFrench Camp, CA 952311518911023
  8. Neeraj Mangla, MDSan Diego, CA 921031912327529
  9. Palaniappan Manickam, M.D., MPHSacramento, CA 958161194962803
  10. Pavan Mankal, M.D.Orange, CA 928681760777320
  11. Neel Mann, M.D.Los Angeles, CA 900331619105665
  12. Rupinder Mann, M.D.Sacramento, CA 958171639552755
  13. Donald Mansell, M.D.Paradise, CA 959691730117862
  14. Ahmad Mansour, MDLa Jolla, CA 920371487882478
  15. Eric Mao, M.D.Sacramento, CA 958161043503295
  16. Amee Mapara-Shah, M.D.San Ramon, CA 945821265681134
  17. Justin Marasigan, DOOxnard, CA 930301174714067
  18. Samuel Marcus, M.D.Stanford, CA 943051396717740
  19. Mazen Mardini, MDLodi, CA 952401518909126
  20. Hemnishil Marella, DOLivermore, CA 945501760915771
  21. Jeffrey Mark, M.D.Turlock, CA 953821487603155
  22. Howard Marks, M.D.Manteca, CA 953361962479352
  23. Jay Marks, MDLos Angeles, CA 900481003871914
  24. Scott Marnoy, MDFontana, CA 923351104985779
  25. Joseph MarsanoSacramento, CA 958171235432527
  26. Jon Marsh, M.D.Yuba City, CA 959911467468090
  27. Keith Martin, M.D.Yorba Linda, CA 928861649280546
  28. Ralston Martin, MDVallejo, CA 945891942388780
  29. Jose Martinez Perez, MDSacramento, CA 958171841949013
  30. Lenna Martyak, M.D.Santa Monica, CA 904041164638177
  31. Chiara MaruggiSan Diego, CA 921301578094132
  32. Michael MassaroCarmichael, CA 956081558741447
  33. Sonali Master, MDSan Diego, CA 921201700934783
  34. Howard Masuoka, MDStanford, CA 943051770630162
  35. Sajen Mathews, MDFullerton, CA 928351326048323
  36. Jagrati Mathur, MDSan Francisco, CA 941091205000734
  37. Christian Mathy, MDSan Francisco, CA 941431922059393
  38. Harry Matossian, M.D.Ukiah, CA 954821316945702
  39. Suzanne Matsui, M.D.Palo Alto, CA 943041316049869
  40. Jonathan Matthew, MDWest Hills, CA 913071124085881
  41. Robin Matuk, M.D.Bakersfield, CA 933091245320563
  42. Sean May, M.D.Yuba City, CA 959911134136989
  43. Andrew Mayer, MDLa Jolla, CA 920371215949201
  44. Emeran Mayer, MDLos Angeles, CA 900951881615508
  45. Frank Mayer, M.D.La Jolla, CA 920371598760589
  46. Laurence Mazzotta, M.D.Vallejo, CA 945901790740546
  47. Richard McAuliffe, MDGreenbrae, CA 949041770546673
  48. Timothy McCarter, MDFontana, CA 923351386628402
  49. Ryan McConnell, MDPalo Alto, CA 943011013151588
  50. John McCracken, MDSacramento, CA 958251235203548

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.