Mary E. MacGuire, MD, FACS, specializes in general surgery, critical care and endoscopy. Located in Casper, WY, Dr. MacGuire is a board-certified surgeon with over 20 years of surgical experience. Her expertise is in general surgery with special focus in Laparoscopic and gastrointestinal surgery, Laparoscopic and endoscopic treatment for esophageal reflux disease, Treatment of breast disease, Thyroidectomy and Parathyroidectomy, Colonoscopy and GI procedures, Hernias and Acid reflux Call Dr. MacGuire's office today to schedule an appointment.