American Society of Clinical Oncology
Guideline for follow-up care, including recommendations for examinations, CEA tests, colonoscopy and sigmoidoscopy exams, and CT scans.
https://www.asco.org/research-guidelines/quality-guidelines/guidelines/patient-and-survivor-care#/10246
National Cancer Institute/Colorectal Cancer
Information, resources, and links pertaining to colorectal cancer survivorship.
http://www.cancer.gov/cancertopics/types/colon-and-rectal
National Comprehensive Cancer Network
Guidelines for colorectal cancer follow-up on this link; available for free, but registration required.
https://www.nccn.org/guidelines/category_1
American Cancer Society
Survivorship guideline for primary care providers.
http://www.cancer.org/healthy/informationforhealthcareprofessionals/acsguidelines/colorectalcancersurvivorshipcareguidelines/