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Gastroenterology in Fullerton, CA

The federal NPI Registry lists 10 gastroenterologists with a practice address in Fullerton.

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Gastroenterologists in Fullerton

Alphabetical, from the federal NPI Registry (CMS), fetched 2026-11-05. Not a ranking or an endorsement; nobody pays to appear in this list. Confirm details with each office.

  • Kumkum Patel, MD, MPH

    Internal Medicine, Gastroenterology

    1837 Sunny Crest Dr · 92835

    714-446-5831

  • Martin Carr, MD

    Internal Medicine, Gastroenterology

    1837 Sunny Crest Dr · 92835

    714-446-5831

  • Patrick Koo, MD

    Internal Medicine, Gastroenterology

    1837 Sunny Crest Dr · 92835

    714-446-5831

  • Richard Mcguire, MD

    Internal Medicine, Gastroenterology

    1521 S Harbor Blvd · 92832

    714-990-0911

  • Sajen Mathews, MD

    Internal Medicine, Gastroenterology

    1837 Sunny Crest Dr · 92835

    714-446-5831

  • Thu Anne Mai

    Internal Medicine, Gastroenterology

    1837 Sunny Crest Dr · 92835

    714-446-5831

  • Vijay Prabhakar, MD

    Internal Medicine, Gastroenterology

    1837 Sunny Crest Dr · 92835

    714-446-5831

  • Yeeshun Miao, MD

    Internal Medicine, Gastroenterology

    2141 N Harbor Blvd Suite 25000 · 92835

    714-626-8610

Plus 2 more registered in Fullerton. Search them all at npiregistry.cms.hhs.gov.

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Questions people ask

How many gastroenterologists practice in Fullerton?
The federal NPI Registry lists 10 gastroenterologists with a practice address in Fullerton. Source: CMS NPI Registry, practice-location addresses.
Can a practice sponsor the Gastroenterology page for Fullerton?
Yes. This page has 1 sponsor position, sold for a flat monthly fee and always labeled "Sponsored". Fees never depend on patients, calls or leads.

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