American Cancer Society
2026 colorectal cancer screening recommendations: age 45 start for average risk, preferred stool/visual tests, new stool RNA option, blood-based screening as non-preferred alternative.
Open source →Evidence library
Primary sources used across Colonoscopy.us
These links form the medical and coverage backbone of the current build. A public site should keep a dated source inventory so future updates are systematic.
USPSTF
Recommended screening ages, intervals, and selective screening age 76–85.
Open source →CDC
Patient-facing screening, symptoms, risk, and the distinction between screening and diagnostic evaluation.
Open source →American College of Gastroenterology
Family-history and higher-risk screening guidance.
Open source →AGA / ASGE / U.S. Multi-Society Task Force
2025 consensus recommendations for bowel-preparation quality, split dosing, patient education, and medication planning.
Open source →National Cancer Institute
Colorectal screening PDQ and cancer-term dictionary used for pathology definitions.
Open source →Medicare
Current coverage pages for colonoscopy, FIT/FOBT, stool DNA, blood-based biomarker screening, sigmoidoscopy, and CT colonography.
Open source →U.S. Department of Labor / HHS / Treasury
ACA preventive-services FAQs addressing colonoscopy, integral services, and follow-up colonoscopy after positive screening tests.
Open source →