NPI
Gastroenterologists in Fontana, CA
11 gastroenterologists in Fontana, CA in the October 12, 2026 NPPES file, by primary taxonomy (Internal Medicine, Gastroenterology). Each row shows the credential, practice address, phone, and NPI.
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License: a US government work, in the public domain (Public Domain Mark 1.0).
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Every provider listed as Internal Medicine, Gastroenterology near your ZIP
Active individuals and group practices from the NPI registry, grouped by practice address, as a spreadsheet.
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Gastroenterologists in Fontana
1 to 11 of 11
- 1790967743Alexander Han, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-5000
- 1174694087Patricia Hsia, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-3910
- 1205903119Timothy Jenkins, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-3910
- 1285705236David Kestenbaum, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-3910
- 1679640486Eve Kirschner, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-3910
- 1104985779Scott Marnoy, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-3910
- 1386628402Timothy McCarter, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-7830
- 1033286844Tommy Oei, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-3910
- 1457514168Nehali Patel, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-5000
- 1053470658Daniel Seid, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-3910
- 1023185931Blanca Viramontes, MD · 9961 Sierra Ave, Fontana CA 92335 · Phone (909) 427-3910
Nearby cities
- Gastroenterologists in Rialto, CA4 mi
- Gastroenterologists in Rancho Cucamonga, CA6 mi
- Gastroenterologists in San Bernardino, CA10 mi
- Gastroenterologists in Upland, CA11 mi
- Gastroenterologists in Riverside, CA13 mi
- Gastroenterologists in Loma Linda, CA13 mi
- Gastroenterologists in Chino, CA15 mi
- Gastroenterologists in Redlands, CA17 mi
Related
- All NPIs in Fontana, CA
- NPIs in California
- Taxonomy code 207RG0100X
- Pharmacists229
- Family Medicine Doctors225
- Student in an Organized Health Care Education/Training Program providers187
- Behavior Technicians141
- Internal Medicine Doctors118
- General Dentists111
- Pharmacies in Fontana, CA37
- Compounding pharmacies in Fontana, CA4
- OIG exclusion check
- Medicare enrollment lookup
Questions
How many gastroenterologists are in Fontana, CA?
11 active NPI records in the October 12, 2026 NPPES file list Internal Medicine, Gastroenterology as their primary taxonomy and a practice location in Fontana, CA.
How do I check a provider's NPI number?
Open the NPI number on a row. The record page shows the NPI, status, practice address, phone, specialties, and licenses as NPPES lists them.
Does this list show insurance or network status?
No. NPPES does not publish insurance or network status. This page lists public registry records only.
Source: NPPES NPI Registry, data as of October 12, 2026. Last updated October 12, 2026. How we source data. Corrections: hello@rivvi.ai.