Gastrointestinal Associates

Gastrointestinal Associates (GIA) is a premier gastroenterology practice and clinical research center based in Knoxville, Tennessee, recognized for its long history of innovation in digestive health. Founded in 1971 by Dr. Bergein Overholt, the inventor of the flexible fiberoptic sigmoidoscope, GIA established the first licensed endoscopic ambulatory surgery center in the United States in 1986. The practice provides comprehensive care for gastrointestinal, liver, and pancreatic disorders and is a national leader in clinical research, participating in numerous Phase 1-3 trials for conditions such as inflammatory bowel disease (IBD) and Barrett's esophagus. GIA operates multiple state-of-the-art endoscopy centers and offers specialized programs like GIA 180 for non-surgical weight management. Through its commitment to research and advanced technology, the company remains at the forefront of gastrointestinal medicine and patient care.