A guide to a high-quality exam
Getting the most from your colonoscopy.
The goal is a careful exam and a clear plan. Ask about your doctor’s training and measured results, then prepare well and follow through on what is found.
Take these questions to your care team
Six questions worth asking.
- Who will perform my colonoscopy, and what specialized training have they completed?
- Do you track individual detection and completion rates? How do you review those results?
- Which preparation is appropriate for me, and whom should I call if I have trouble?
- How do my health and medications affect the sedation plan and procedure setting?
- If you find a large or difficult polyp, how will further treatment be arranged?
- How will I receive the procedure report, pathology results, and next-exam recommendation?
1Choose your clinician
Specialized training. Demonstrated quality.
Gastroenterologists complete three years of dedicated fellowship training in digestive disease and endoscopy after residency. [1]
On average, studies find that gastroenterologists detect more adenomas and complete more exams than surgeons. The evidence is observational and doesn’t rank any individual doctor. Read the specialty evidence
Where should you have it done?
Your referring clinician can help you find an experienced provider and a setting that suits your health, sedation needs and insurance. A doctor’s procedure volume is useful context, but not proof of quality on its own. See what the volume studies show
2Understand quality
Look beyond “the procedure was completed.”
Quality means a clean colon, reaching the end of the colon, a careful look, appropriate polyp removal and a written follow-up plan. [2]
The measure you may hear about is the adenoma detection rate: the share of a doctor’s screening exams that find at least one precancerous polyp. It matters. In a large screening program, when doctors who found fewer adenomas improved, fewer of their patients later developed cancer. Read the long-term quality study
Explore the professional quality measures and their definitions
3AI-assisted detection
Can AI help find more polyps?
AI tools such as GI Genius flag suspicious areas while your doctor looks. In a large randomized trial, more patients had at least one adenoma found with AI: 56.6% versus 48.4%.
AI supports a careful look; it doesn’t replace good prep or a skilled doctor. Trials haven’t yet shown fewer future cancers. It’s fair to ask whether your practice uses it.
4Prepare and plan
A clear view starts before your appointment.
Follow your team’s written diet, prep and fasting instructions; a split-dose prep is usually recommended. Call if you can’t finish, or if a past prep went poorly. [3]
Review your medicines and supplements with the team, and arrange a ride home if you’ll be sedated. Ask how your health affects the risks, which include bleeding, a tear in the colon and reactions to sedation. [4]
5Follow through
Leave with a plan. Get the final results.
Ask for the procedure report. Was the view clear and the whole colon examined? Were polyps removed, or is another procedure needed? Confirm how you’ll get the lab results, and whom to call if they don’t arrive. [2] [4]
When you’re next due depends on what was found, the quality of the exam and your history. Ten years after a normal exam assumes a high-quality exam and average risk. [5]
Sources & interpretation
Behind this guide.
All six sources
- ACGME. Gastroenterology program requirements, 2026. Training duration and competencies.
- ASGE/ACG. Quality indicators for colonoscopy, 2024. Examination quality and performance measures.
- U.S. Multi-Society Task Force. Bowel preparation guidance, 2025.
- NIDDK. Colonoscopy. Preparation, risks, recovery, and results.
- U.S. Multi-Society Task Force. Follow-up after colonoscopy and polypectomy, 2020.
- Pilonis et al. Adenoma detection and subsequent cancer risk, 2025. Observational evidence on improvement in measured detection.
Detection-outcomes evidence added October 2, 2026; other guide material reviewed September 28, 2026. The practical recommendation and questions above are Colonoscopy First’s interpretation. Specialty and procedure-volume research, with limitations