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 1 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. David Aarons, MDLodi, CA 952401619081379
  2. Constante Abaya, MDOxnard, CA 930301003918459
  3. Sadeea Abbasi, M.D., PH.D.Los Angeles, CA 900331366713513
  4. Basim Abdelkarim, MDUpland, CA 917861932217544
  5. Homan Abdollahzadeh, MDPalm Springs, CA 922621184634826
  6. John Abdulian, M.D.Fresno, CA 937201437114113
  7. Hussein Abidali, DORancho Cucamonga, CA 917301205274768
  8. Alaa Abousaif, MDOrange, CA 928681235124108
  9. Donald Abrahm, M.D.Newport Beach, CA 926631215022405
  10. Maria Abreu, M.D.West Hollywood, CA 900481598793374
  11. Safwat Absood, M.D.Modesto, CA 953551932113891
  12. Barham Abu Dayyeh, MDWest Hollywood, CA 900481902927353
  13. Ronald Adamany, M.D.Mission Viejo, CA 926911992780688
  14. Miles Adler, M.D.San Leandro, CA 945781760414502
  15. Ronald Adler, MDOakland, CA 946021134206162
  16. Rashmi Advani, M.D.West Hollywood, CA 900481902253958
  17. Parviz Afshani, M.D.Santa Monica, CA 904041083693766
  18. Payam Afshar, M.D.La Mesa, CA 919421023192861
  19. Nikhil Agarwal, M.D.San Francisco, CA 941151487831145
  20. Vijay Agarwal, M.D.Palm Springs, CA 922621609964154
  21. Maria AguilarSacramento, CA 958171265701494
  22. Thomas Aguirre, M.D.Santa Barbara, CA 931051285772004
  23. Hrair Aharonian, M.D.Northridge, CA 913261174771034
  24. Waseem Ahmad, M.D.San Francisco, CA 941151649633991
  25. Aijaz Ahmed, MDStanford, CA 943051447351747
  26. Waseem Ahmed, MDWest Hollywood, CA 900481497166573
  27. Michael Ahn, MDSanta Clara, CA 950511225115173
  28. Gabriella Aitcheson, MDSan Bernardino, CA 924081295230415
  29. Veeral Ajmera, M.D.San Diego, CA 921031932429842
  30. Adewale Ajumobi, M.D.Rancho Mirage, CA 922701871777698
  31. Kathy Akashi, MDAnaheim, CA 928071952472862
  32. Daud Akhtar, MDStanford, CA 943051205666245
  33. Naeem Akhtar, MDMadera, CA 936371831291863
  34. Ali AkramSacramento, CA 958161194168450
  35. Mumtaz Akram, M.D.West Covina, CA 917901144325242
  36. Alsadiq Al HillanLos Angeles, CA 900951932632700
  37. Mounzer Al Samman, M.D.Fairfield, CA 945341700822160
  38. Khalid Al Shamousi, MD, FRCPCLos Angeles, CA 900481386299972
  39. Yasser Al-Antably, MDSacramento, CA 958251285712992
  40. Hussain Al-Darsani, M.D.Chino, CA 917101669429775
  41. Amar Al-Juburi, M.D.Sacramento, CA 958171821041229
  42. Dalia Al-Mudallal, M.D.Laguna Hills, CA 926531356502116
  43. Abdul Alaama, M.D.Montebello, CA 906401861439135
  44. Ravindra Alapati, MDAnaheim, CA 928011912989773
  45. Erick Alayo, M.D.Chula Vista, CA 919101841454758
  46. C Gregory Albers, MDOrange, CA 928681982784047
  47. Michael Albertson, M.D.Thousand Oaks, CA 913601114035128
  48. Somaya Albhaisi, MBBCH, MPHLos Angeles, CA 900331518318104
  49. Liberacion Albinda, M.D.Oakley, CA 945611104953983
  50. David Alexanian, M.D.Burbank, CA 915051578806089

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.