The right gastroenterology expertise—when and where you need it.

Regional Gi formed when both of Lancaster County’s long-trusted gastroenterology practices merged. Combined, our team can now match patients with experts in virtually any digestive condition that could affect you and your family. We also have specialists in procedures such as colonoscopy, endoscopy, and advanced surgeries. You can see any clinician you choose at any Regional Gi location. Follow the links on this page to get to know our providers and review their backgrounds and clinical interests.

Photo of J. David Horwhat MD, FACG, FASGE

J. David Horwhat MD, FACG, FASGE

Areas of Interest
Advanced Endoscopy, Cryotherapy, Ablative Treatments, Barretts Esophagus, Esophageal Cancer, Radiation Proctitis

Temple University

Clinical & Research Fellowship
Walter Reed Army Medical Center, Duke University Medical Center

Board Certification
Internal Medicine and Gastroenterology

Biographical Info

Dr. Horwhat is a Pennsylvania native who returned to practice in his home state after a 21 year career as an active duty military medical officer. Dr.Horwhat earned his Bachelor of Arts degree in Biology from Cornell University in 1988 and his Doctor of Medicine degree from Temple University in 1992. Dr. Horwhat completed his Internal Medicine training at Madigan Army Medical Center, Gastroenterology Fellowship at the Walter Reed Army Medical Center and Advanced Endoscopy Fellowship from Duke University Medical Center.

He has authored or co-authored over 70 publications, book-chapters and abstracts and has lectured on numerous areas of advanced endoscopy. During fellowship training, Dr. Horwhat was involved with the development and clinical use of endoscopic spray cryotherapy along with LGI’s Dr. Mark Johnston at the National Naval Medical Center in Bethesda, MD. Dr Horwhat continues to work with cryotherapy and other ablative treatments in Barrett’s esophagus, palliation of esophageal cancer and treatment of radiation proctitis and is recognized as a national expert in this area of gastroenterology.

Dr. Horwhat’s practice focuses on Advanced Therapeutic Endoscopy.  He is Board Certified in Gastroenterology and is a Fellow of the American College of Gastroenterology and Fellow of the American Society of Gastrointestinal Endoscopy.

Dr. Horwhat and his wife have three children.