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Our Practice

Hilton Head Gastroenterology is a wholly private medical practice providing comprehensive gastrointestinal services to patients and referring physicians. We are conveniently located on Hilton Head Island and have a second office in Hardeeville across from the University of South Carolina Beaufort - Bluffton campus. 

Hilton Head Gastroenterology has been caring for patients in the Hilton Head, Bluffton, Hardeeville, and Beaufort areas since 1985.  As it's an independent practice Hilton Head Gastroenterology is free to work with a variety of partners and has long standing relationships with the Medical University of South Carolina, Mayo Clinic - Jacksonville, Hilton Head Hospital and the Outpatient Surgery Center of Hilton Head. For surgical procedures not available in Beaufort County we utilize our relationships with our colleagues from Jacksonville, Fl, to Charleston, SC. 

Our practice is dedicated to caring for patients with digestive disorders. Our staff is committed to providing high quality, cost effective medical care.

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Our Doctors and Practitioners
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Michael Gilbreath, MD


Medical School:

University of Illinois College of Medicine at Chicago

Internship and Residency:

Barnes Hospital, St. Louis, Missouri


Washington University School of Medicine in St. Louis

Board Certifications:

Internal Medicine and Gastroenterology

Julie M. Sim, MSN, APRN
Julie M. Sim, MSN, APRN

Jacksonville University, Jacksonville, FL

Advanced Practicioner School (MSN):


South University, Savannah, GA

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Glenn Gwozdz, MD

Medical School:

Cornell University Medical College

Internship and Residency:

George Washington University Hospital


University of Maryland Hospital

Board Certifications:

Internal Medicine and Gastroenterology

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Mandy de Bruin, MSN, APRN



Indiana and Purdue University, IN

Advanced Practitioner School (MSN):

Walden University, Minneapolis, MN

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