Thoracic Surgery What is Thoracic Surgery? Thoracic surgery is the branch of surgery that treats the structures of the chest with the exception of the heart. A thoracic surgeon is trained in the surgical treatment of the esophagus, lungs, chest muscle and the diaphragm muscle. A cardiothoracic surgeon is a thoracic surgeon also trained in surgery performed on the heart. Horizon locations offering this service: Fredericton Facility Name Address Phone Dr. Everett Chalmers Regional Hospital (Fredericton) 700 Priestman St. , PO Box 9000, Fredericton, New Brunswick, E3B 3B7 506-452-5400 Moncton Facility Name Address Phone The Moncton Hospital 135 MacBeath Ave., Moncton, New Brunswick, E1C 6Z8 506-857-5111 Saint John Facility Name Address Phone Saint John Regional Hospital 400 University Ave., Saint John, New Brunswick, E2L 4L2 506-648-6000