A colonoscopy in Northern Virginia is one of the most effective steps you can take to protect your long-term health, because it can find and remove precancerous polyps before they ever become a problem. For many people the test feels intimidating, mostly because of the unknowns. This guide explains when colon cancer screening should begin, how often it is repeated, and what actually happens before, during, and after the procedure, so you can make an informed decision with your gastroenterologist.
This article is general education, not medical advice. Your own timing and screening plan should be set with a physician who knows your history.
What a colonoscopy is and why it matters
A colonoscopy is an exam that lets a gastroenterologist look at the inner lining of the colon and rectum using a thin, flexible camera. Its real advantage is that it does two jobs at once: it detects abnormal growths called polyps and allows the physician to remove many of them during the same exam. Because most colorectal cancers begin as polyps that grow slowly over years, removing them early is what makes screening so powerful.
When to get screened
For adults at average risk, the American Cancer Society updated its guidance in 2026 and continues to recommend starting colorectal cancer screening at age 45. The U.S. Preventive Services Task Force also recommends screening for average-risk adults from age 45 to 75. Screening generally continues to age 75 when life expectancy is greater than 10 years, and adults between 76 and 85 should decide with their physician whether to continue.
Some people should begin earlier or screen more often, including those with a family history of colorectal cancer or polyps, inflammatory bowel disease, or certain inherited conditions. A gastroenterologist can look at your personal and family history and recommend the right starting age and interval for you.
How often a colonoscopy is repeated
For average-risk adults whose colonoscopy is normal, screening is generally repeated every 10 years. If polyps are found and removed, your physician may recommend a shorter interval based on what was found. This is why the results of one exam guide the timing of the next, rather than a single fixed schedule for everyone.
What to expect before, during, and after
Preparation is the part most people remember. The day before your exam you will follow a clear-liquid diet and complete a bowel prep that cleanses the colon, which helps your physician see clearly. The exam itself usually takes about 30 to 60 minutes and is done under sedation, so most people are comfortable and remember little of it. You will need someone to drive you home afterward because of the sedation, and most people return to normal activity the next day. Your care team will review any findings with you and explain the next steps.
Screening options beyond colonoscopy
Colonoscopy is considered the gold standard because it can both find and remove polyps in one step, but it is not the only option. Stool-based tests, such as the fecal immunochemical test and multitarget stool tests, are also recommended, and newer blood-based tests are available though not yet a preferred choice. A useful point to discuss with your gastroenterologist is that if a non-colonoscopy test is positive, a colonoscopy is still needed to follow up. You can read more about the recommended options through the American Cancer Society.
Tips for an easier bowel preparation
Because the bowel prep is the part most people find inconvenient, a little planning makes it easier. Begin the clear-liquid diet on schedule, stay well hydrated throughout the day, keep the prep solution cold and sip it steadily rather than all at once, and stay close to a bathroom once it begins. Many people find it helps to have wipes and a comfortable spot ready for the evening. Following the instructions closely is the most reliable way to make sure your colonoscopy gives a clear, complete view the first time, which reduces the chance of needing to repeat it. If any part of the instructions is unclear, call the office before your appointment rather than guessing.
What happens if a polyp is found
Finding a polyp during a colonoscopy is common and is not a cause for alarm on its own. Most polyps are removed during the same exam and sent to a laboratory to be examined under a microscope. Depending on the number, size, and type of polyps, your gastroenterologist will recommend when your next colonoscopy should be, which may be sooner than the usual 10-year interval. This follow-up planning is part of what makes colonoscopy so valuable, because it does not just look, it also treats by removing growths before they have a chance to develop further.
Does insurance cover a screening colonoscopy?
Many health plans cover a screening colonoscopy as preventive care for average-risk adults, though the specifics vary by plan and situation. Coverage can differ when a colonoscopy is diagnostic rather than screening, or when polyps are found and removed during the exam, which can change how the visit is billed. Because the details depend on your individual plan, it is worth confirming your benefits with your insurer and with our office before your appointment so there are no surprises. Our team can help you understand what questions to ask.
Colonoscopy in Northern Virginia with GC of NoVA
Gastroenterology Center of Northern Virginia provides colonoscopy and colon cancer screening for patients across Arlington, Annandale, and the surrounding Northern Virginia communities. Our physicians perform procedures at VHC Health, Inova Fairfax Hospital, and the Woodburn Endoscopy Center, and we see patients at two offices: Arlington, next to VHC Health, and Annandale, in the Woodburn Medical complex. If you are due for screening or have questions about whether it is time to start, we are here to help you understand your options.
To schedule a colonoscopy or a screening consultation, contact our Arlington office at (703) 522-7476 or our Annandale office at (703) 560-6106, or learn more at gcofnova.com. If you are weighing symptoms alongside screening, our guide to GERD and acid reflux in Northern Virginia may also help.
Frequently asked questions about colonoscopy in Northern Virginia
At what age should I start colon cancer screening?
For average-risk adults, the American Cancer Society and the U.S. Preventive Services Task Force recommend starting at age 45. People with a family history or other risk factors may need to begin earlier, which a gastroenterologist can help determine.
How often do I need a colonoscopy?
For average-risk adults with a normal exam, a colonoscopy is generally repeated every 10 years. If polyps are found and removed, your physician may recommend a shorter interval.
Is a colonoscopy uncomfortable?
The exam is done under sedation, so most people are comfortable during the procedure and remember little of it. Many people find the bowel preparation the day before to be the more noticeable part. Plan for someone to drive you home afterward.
Where are colonoscopies performed in Northern Virginia?
Gastroenterology Center of Northern Virginia performs procedures at VHC Health, Inova Fairfax Hospital, and the Woodburn Endoscopy Center, with offices in Arlington and Annandale.
This article is for general education and is not medical advice. Talk with a qualified gastroenterologist about your symptoms, screening timing, and treatment options.
