Overholt is a graduate of the University of Tennessee Medical School. He did his internship, residency and gastroenterology fellowship at University Hospital in Ann Arbor, Mich., and additional gastroenterology fellowship training at New York Hospital-Cornell Medical Center. He is president of Gastrointestinal Associates (GIA) in Knoxville. His efforts led his group in the development of the first licensed and accredited endoscopic ambulatory surgery center in the USA. This center was the first ASC to partner with AMSURG. He is now leading the development of an innovative quality and value program for GIA.
Overholt has been involved with technology development his entire professional career and received the prestigious Schindler Award from the American Society for Gastrointestinal Endoscopy and the William Beaumont Award of the American Medical Association for the development of flexible fiberoptic sigmoidoscopy. Overholt served as the Medical Director of the Laser Center of the Thompson Cancer Survival Center until 2011 where he pioneered the development of photodynamic therapy and radiofrequency ablation of precancerous esophageal disease. He is a past president of the American Society for Gastrointestinal Endoscopy and the American Association of Ambulatory Surgery Centers and is widely published in the field of gastroenterology. He served as medical director and board member of AMSURG from 1993 through 2009 and currently serves on the board of directors of gMed, The Whitestone Group, PRSM Healthcare and CRH Medical.