Reviewed by the Evolve Health clinical team · 2026-10-16 · 8 min read
Clinically reviewed by the Evolve Health clinical team — October 2026
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Quick answer
If you are an average-risk adult, colorectal cancer screening starts at 45 — that is the U.S. Preventive Services Task Force recommendation, for everyone from 45 through 75. You have two main routes: the FIT test, a take-home stool test repeated every year, or a colonoscopy, a specialist procedure repeated every 10 years if it is normal. At Evolve Health, your clinician can order the FIT through the lab and refers you for a colonoscopy if you choose that route or a FIT result needs follow-up. Screening is typically covered as preventive care — and we verify your coverage free, from your insurance card, photo ID, and date of birth, before you schedule.
The questions we hear about this one follow a pattern: "I feel completely fine — do I really need this?" "Is a stool test actually enough?" "I thought screening started at 50." All fair. Screening is unusual in medicine because it is meant for people who feel fine — and this particular screening does double duty. Most colorectal cancers start as small growths called polyps, and polyps usually grow slowly, over years. Find and remove a polyp, and you may have prevented a cancer outright. Find a cancer early, before it has spread, and as the American Cancer Society puts it, it is far easier to treat successfully. That combination — preventable and highly treatable when caught early — is why this screening is worth doing on schedule even when nothing feels wrong.
Why the starting age moved from 50 to 45
For decades, 50 was the milestone birthday for a first colonoscopy. In 2021, the U.S. Preventive Services Task Force lowered the recommended starting age to 45 for average-risk adults, because colorectal cancer has been steadily rising in younger adults while falling in older ones — screening works, and the trend lines said it needed to start sooner. The recommendation covers ages 45 through 75 (a Grade A recommendation for ages 50 to 75, Grade B for 45 to 49). "Average risk" means no personal history of colorectal cancer or advanced polyps, no inflammatory bowel disease like Crohn's or ulcerative colitis, and no strong family history. If any of those apply to you, your timeline may be different — possibly starting at 40, or even earlier — and that is a clinician-directed decision, not a do-it-yourself calculation.
Route 1: FIT — the take-home stool test
FIT stands for fecal immunochemical test. It looks for hidden (occult) blood in your stool — blood you cannot see, which can be an early sign of a polyp or cancer. Your clinician orders the kit through the lab, you collect a small sample at home, and you return the kit for analysis. No clinic procedure, no prep, no sedation, no dietary restrictions, and no time off work. The trade-offs are just as clear:
- It is a yearly test. One FIT checks one moment in time. Its protection comes from the rhythm — repeated every year, it gets repeated chances to catch bleeding from a growing polyp.
- It detects blood, not polyps. A polyp that is not bleeding can be missed. That is a known limit of the test, and exactly why the yearly repeat matters.
- A positive result is a referral, not an answer. If blood is found, the next step is a colonoscopy to locate the source. Most positive FITs turn out to be something other than cancer — but the follow-up is how you know.
Route 2: colonoscopy — the find-it-and-remove-it option
A colonoscopy is a procedure performed by a specialist (usually a gastroenterologist) at a hospital or endoscopy center, using a thin camera to examine the entire colon. It is the most thorough single test — and it is the only screening route that treats as it goes: if the specialist finds a polyp, they can usually remove it during the same procedure, before it ever has the chance to become a cancer. If everything is normal, an average-risk adult typically does not need another one for 10 years. The honest downsides are the logistics: a bowel prep the day before to clear the colon, sedation during the procedure, a driver to take you home afterward, and most of a day set aside. Like any procedure, it carries small risks, which the specialist will review with you beforehand. To be clear about our role: Evolve Health does not perform colonoscopies. We refer you to a trusted local specialist and stay involved in your care before and after.
FIT vs. colonoscopy, side by side
| FIT (stool test) | Colonoscopy | |
|---|---|---|
| Where it happens | At home, with a kit from the lab | At a specialist's procedure center |
| How often | Every year | Every 10 years, if normal |
| Preparation | None | Bowel prep the day before |
| Sedation | None | Yes — you will need a driver |
| What it does | Detects hidden blood in the stool | Views the colon directly and removes polyps |
| If something is found | A colonoscopy is needed to find the source | Polyps are usually removed during the same procedure |
So which one should you choose?
Honestly? For most average-risk adults, the best screening test is the one that actually gets done. A colonoscopy done on schedule is an excellent choice. A FIT done every single year, without fail, is also an effective screening strategy — the guidelines endorse both. FIT tends to fit people who want to start now, at home, without prep or a day off. Colonoscopy tends to fit people who would rather do the most complete test and be done for a decade, and it is the route your clinician is more likely to recommend if you have a family history, prior polyps, or any symptoms. There are other stool-based options as well — your clinician can walk through them if you are curious. What does not work is the third option a lot of people quietly pick: neither. If you are 45 or older and unscreened, either route puts you ahead of that.
How screening works at Evolve Health
It usually starts with a conversation at your annual physical — which is often $0 with acceptable insurance. Your clinician reviews your age, history, and family history, and helps you pick a route. If FIT fits, we order the take-home kit through the lab, and we review the result with you when it comes back — a negative result goes on your yearly reminder list, and a positive one means we arrange the colonoscopy referral promptly. If colonoscopy fits better from the start, we place the referral and follow up on the report. Either way, before anything is scheduled, we verify your coverage free from your insurance card, photo ID, and date of birth. Screening at 45 to 75 is typically covered as preventive care, and under current federal guidance that includes the follow-up colonoscopy after a positive stool test for most plans. If you do not have insurance, call us before you assume it is out of reach — we will tell you the self-pay cost of the lab test before anything is ordered.
Symptoms that should not wait for screening
Everything above is about screening — testing people who feel fine. Symptoms are a different situation, and they should not be routed through a screening test or a "wait until my physical" plan. See a clinician promptly if you notice:
- Blood in your stool — even once, even if you assume it is hemorrhoids.
- A persistent change in bowel habits — new constipation, diarrhea, or narrower stools lasting more than a few weeks.
- Unexplained iron-deficiency anemia on lab work — low iron with no clear cause deserves an explanation.
- Unexplained weight loss — losing weight without trying is a symptom, not a success.
These need a diagnostic evaluation, not a screening test — and that is true at any age, including well under 45. Most of the time the cause turns out to be something ordinary, but "most of the time" is a conclusion you reach after an evaluation, not before one.
Frequently asked questions
At what age should I start colorectal cancer screening?
If you are at average risk, start at 45. The U.S. Preventive Services Task Force recommends screening for all average-risk adults from age 45 through 75. If a parent or sibling had colorectal cancer or advanced polyps — especially before age 60 — your clinician may recommend starting earlier, sometimes at 40 or 10 years before the age your relative was diagnosed. When in doubt, ask: the right start age is a two-minute conversation at your next visit.
What is the difference between a FIT test and a colonoscopy?
FIT is a take-home stool test that checks for hidden blood in your stool — a possible early sign of polyps or cancer. You collect the sample at home, return it to the lab, and repeat it every year. A colonoscopy is a procedure a specialist performs with a camera, usually every 10 years if the results are normal, and its advantage is that the specialist can find and remove polyps during the same procedure. In short: FIT looks for signs that something needs a closer look; a colonoscopy is the closer look.
If my FIT is positive, does that mean I have cancer?
No. A positive FIT means blood was detected in your stool, and blood has many possible sources — polyps, hemorrhoids, and inflammation are all more common explanations than cancer. What a positive FIT does mean is that a colonoscopy is needed to find the source. That follow-up step is not optional: the FIT did its job by flagging the blood, and the colonoscopy is how the question gets answered.
Does insurance cover colorectal cancer screening?
In most cases, yes. For average-risk adults ages 45 to 75, colorectal cancer screening is preventive care, and most plans cover the screening itself — including, under current federal guidance, the follow-up colonoscopy after a positive stool test. Details still vary by plan. At Evolve Health we verify your coverage free, from your insurance card, photo ID, and date of birth, before you schedule — so you know where you stand ahead of time.
Can Evolve Health do my screening?
Partly — and we coordinate the rest. Your Evolve clinician can order the take-home FIT through the lab, review your results with you, and help you choose the screening route that fits your risk and your life. We do not perform colonoscopies. If you choose that route, or a FIT result needs follow-up, we refer you to a trusted local specialist and stay in the loop on your results.
What symptoms mean I should not wait for a screening test?
Screening is for people who feel fine. Book a visit promptly instead if you notice blood in your stool, a change in bowel habits that lasts more than a few weeks, or unexplained weight loss, or if lab work has shown iron-deficiency anemia without a clear cause. Those symptoms need a diagnostic evaluation, not a routine screening test — and they deserve attention at any age, including under 45.
Sources
- U.S. Preventive Services Task Force — Colorectal Cancer: Screening (final recommendation: screening for adults ages 45 to 75; Grade A for 50 to 75, Grade B for 45 to 49)
- American Cancer Society — Colorectal Cancer Screening Recommendations (screening options, intervals, and follow-up after a positive stool test)
- Centers for Disease Control and Prevention — Screening for Colorectal Cancer (test types, preparation, and what results mean)
General education only: This article explains colorectal cancer screening options in general terms. Your personal screening plan — which test, and when to start — depends on your history and risk, and your clinician can help you decide.
Turning 45 this year? Leave your physical with a plan
Book an annual physical (often $0 with acceptable insurance) and start the screening conversation. We will verify your coverage free before your visit — then order your FIT or place your colonoscopy referral, whichever route fits you.