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Mathews Journal of Gastroenterology & Hepatology

2572-6471
Dr. Ronnie Fass
Dr. Ronnie Fass

Director
Case Western Reserve University
USA

Biography

Dr. Ronnie Fass is currently working as Director of the Division of Gastroenterology and Hepatology and head of the Esophageal and Swallowing Center at the MetroHealth Medical Center, Cleveland Ohio. He is also a tenured professor of medicine at Case Western Reserve University. Dr. Fass did his internship and residency in internal medicine at the University of Arizona Health Sciences Center, where he later became a Chief Resident. He then completed a fellowship in gastroenterology at the University of California in Los Angeles where he focused on GI motility and functional bowel disorders.

Dr. Ronnie Fass holds many honorary positions in various scientific societies and communities related to Gastroenterology and Hepatology. Ronnie Fass received many awards and also serves as Editorial board member for various National and International journals related to Gastroenterology and Hepatology. He has published more than 550 articles, editorials, commentaries, and abstracts in journals such as Gastroenterology, Gut, American Family Physician, American Journal of Gastroenterology and Archives of Internal Medicine. He has published two books (GERD and NCCP) and has written 47 book chapters.

Research interests: 
Gastro Intestinal motility
Functional bowel disorders
Gastroesophageal Reflux Disease (GERD)
Peptic disorders

Recently Published Articles
Research Article

AST/ALT Ratio: Differential Diagnostic Modality Between ALD and Viral Hepatitis – A Preliminary Study

Published : 13th March 2026
Authors : Sangeetha Sahoo1, Muni Kumar D2, Hari Priya S2,*
Citation : Sahoo S, et al. (2026). AST/ALT Ratio: Differential Diagnostic Modality Between ALD and Viral Hepatitis – A Preliminary Study. Mathews J Gastroenterol Hepatol. 11(1):40.

Research Article

Briefly about Endoscopy

Published : 09th March 2026
Author : Siniša Franjić*
Citation : Franjić S. (2026). Briefly about Endoscopy. Mathews J Gastroenterol Hepatol. 11(1):39.

Review Article

Eosinophilic Esophagitis is GERD against the Background of Allergies: Hypothesis. Diagnosis and Treatment

Published : 28th January 2026
Author : Michael D Levin*
Citation : Levin MD. (2026). Eosinophilic Esophagitis is GERD against the Background of Allergies: Hypothesis. Diagnosis and Treatment. Mathews J Gastroenterol Hepatol. 11(1):38.

Review Article

Etiology and Pathogenesis of Inflammatory Diseases of the Biliary Tract: A Hypothesis

Published : 26th December 2025
Author : Michael D Levin*
Citation : Levin MD. (2025). Etiology and Pathogenesis of Inflammatory Diseases of the Biliary Tract: A Hypothesis. Mathews J Gastroenterol Hepatol. 10(3):37.

Review Article

The Pathophysiology of Esophageal Achalasia, As Described by The Chicago Classification, Corresponds in Most Cases to GERD

Published : 25th November 2025
Author : Michael D Levin*
Citation : Levin MD. (2025). The Pathophysiology of Esophageal Achalasia, As Described by The Chicago Classification, Corresponds in Most Cases to GERD. Mathews J Gastroenterol Hepatol. 10(3):36.

Review Article

Belching Pathophysiology

Published : 29th October 2025
Author : Michael D Levin*
Citation : Levin MD. (2025). Belching Pathophysiology. Mathews J Gastroenterol Hepatol. 10(3):35.

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