In This Section Related Links Gastroenterology at Dartmouth-Hitchcock Norris Cotton Cancer Center - GI Cancer Endoscopy Center at Dartmouth-Hitchcock Manchester Colorectal Cancer Screening Why Have a Colorectal Cancer Screening? Types of Colorectal Cancer Screening Tests Before Your Colonoscopy During Your Colonoscopy After Your Colonoscopy Risks and Complications Insurance Information Clinical Trials Related Links More Appointment Information Contact Us Concord, NH Phone: (603) 228-1763Fax: (603) 228-7088 Lebanon, NH (DHMC) Phone: (603) 650-5030 Manchester, NH Phone: (603) 629-8299Fax: (603) 629-1730 Nashua, NH Phone: (603) 577-4081Fax: (603) 577-4277