How often should you get a colonoscopy?
As Dr. Khan explains, adults at average risk should start colonoscopy screening at age 45 and repeat it every 10 years if the result is normal. People with a parent, sibling or child who had colon cancer or advanced polyps usually start at 40, or 10 years before that relative's diagnosis, and repeat every 5 years. If polyps are found, the next colonoscopy may be in 3, 5, 7 or 10 years depending on their number, size and type.
Colonoscopy screening intervals at a glance
- Average risk, normal resultEvery 10 years from age 45.
- Family historyStart at 40 or earlier; usually every 5 years.
- Polyps or IBD1 to 7 years, set by your gastroenterologist.
What does a colonoscopy detect?
A colonoscopy detects colon and rectal polyps, colorectal cancer, inflammation from ulcerative colitis, Crohn's disease or microscopic colitis, diverticulosis, sources of bleeding such as angiodysplasia, hemorrhoids, and causes of chronic diarrhea or anemia. Biopsies taken during the procedure confirm the diagnosis. Read more about what a colonoscopy detects.
| Finding at last colonoscopy | Typical next colonoscopy |
|---|---|
| Normal, average risk | 10 years |
| 1 to 2 small tubular adenomas (under 10 mm) | 7 to 10 years |
| 3 to 4 small adenomas | 3 to 5 years |
| Adenoma 10 mm or larger, or advanced features | 3 years |
| Large polyp removed in pieces | 6 months |
| Small hyperplastic polyps in the rectum | 10 years |
| Ulcerative colitis or Crohn's colitis (8+ years) | Every 1 to 3 years |
When should you stop colonoscopy screening?
Screening is recommended through age 75. Between 76 and 85, the decision is individual and depends on overall health, life expectancy and prior results. Screening is usually not recommended after 85. Your gastroenterologist will help weigh the benefits and risks.
Do not wait for your screening date if you have
- Rectal bleeding or blood in the stool
- A change in bowel habits lasting more than three weeks
- Iron deficiency anemia
- Unexplained weight loss
- A positive stool test such as FIT or Cologuard
Have symptoms like these?
Dr. Muhammad Ali Khan, a board-certified gastroenterologist and hepatologist, sees adults at our Katy and Cypress offices, serving patients across Greater Houston.
Are there alternatives to colonoscopy?
Yes. Stool-based tests such as yearly FIT and stool DNA testing every 3 years, and CT colonography every 5 years, are accepted options for average-risk adults. Any abnormal result needs a follow-up colonoscopy. Colonoscopy remains the preferred test for people with symptoms or higher risk. Compare colonoscopy vs Cologuard.
Tip: Keep a copy of your colonoscopy and pathology report. The polyp type and size decide your next interval, and having the report avoids repeating screening too early or too late.
How do you prepare for a colonoscopy?
Preparation involves a low-residue diet for a day or two, clear liquids the day before, and a bowel prep solution taken in split doses. A clean colon lets the doctor see small polyps. You will need someone to drive you home after sedation. See our colonoscopy prep guide.
Where can you get a screening colonoscopy near Katy or Cypress?
Dr. Muhammad Ali Khan performs screening and diagnostic colonoscopies for patients from Katy, Cypress, Fulshear, Richmond and Greater Houston. Learn more about colon cancer screening and colonoscopy services.
Get answers instead of guessing
Request a visit with Dr. Muhammad Ali Khan at our Katy and Cypress offices. Call the office to check your insurance coverage; self-pay options are available.
Key takeaways
- Average-risk adults start colonoscopy screening at 45 and repeat every 10 years if normal.
- Family history usually means starting at 40 and repeating every 5 years.
- The type, size and number of polyps set your next interval.
- Colonoscopy detects polyps, cancer, colitis, diverticulosis and bleeding sources.
- Symptoms or a positive stool test need a colonoscopy right away.
Frequently asked questions
Is colonoscopy covered by insurance?
Screening colonoscopy is covered by most plans as preventive care. A diagnostic colonoscopy may have costs. See colonoscopy cost and insurance.
Does colonoscopy hurt?
Most patients are sedated and feel little or nothing. Mild bloating afterwards is common.
How long does a colonoscopy take?
The procedure usually takes 20 to 40 minutes, with a total visit of 2 to 3 hours.
Can I get a colonoscopy before 45?
Yes, if you have symptoms, a family history or other risk factors.
What is the adenoma detection rate?
It is the share of screening colonoscopies in which a doctor finds at least one precancerous polyp, a key quality measure.
Do I need a referral to see a gastroenterologist in Katy or Cypress?
It depends on your insurance plan. Many PPO plans let you book a specialist directly, while some HMO plans require a referral from your primary care doctor. Call (346) 340-4414 and the team can help you check.
Sources
- NIDDK — Colonoscopy
- MedlinePlus — Colonoscopy
- USPSTF — Colorectal cancer screening
- American College of Gastroenterology — Colorectal cancer
- National Cancer Institute — Colorectal cancer
Where to be seen in Katy and Cypress
United Gastroenterology Associates has two offices: Katy, at 23920 Katy Freeway, Suite 555, next to Memorial Hermann Katy Hospital, and Cypress, at 21216 Northwest Freeway, Suite 640, on US-290. Both are open Monday through Friday, 8:30 AM to 5:00 PM, closed for lunch from 12:00 to 1:30 PM, and serve patients from Fulshear, Richmond and across Greater Houston. Call (346) 340-4414 for either office.
Katy office
23920 Katy Freeway, Suite 555
Katy, TX 77494
Memorial Hermann Medical Plaza 1
Next steps
If you are dealing with how often should you get a colonoscopy or any ongoing digestive concern, a focused evaluation can find the cause and start the right treatment. Dr. Muhammad Ali Khan and the team at United Gastroenterology Associates see adults from Katy, Cypress, Fulshear, Richmond, Greater Houston and across Texas. Call (346) 340-4414 or request an appointment today.
If you have severe pain, vomit blood, pass black stools or have chest pain, call 911 or go to the nearest emergency room.
