After the ACS update, when does a blood test fit colorectal screening?
The American Cancer Society’s May 27, 2026 update added a blood-based option for colorectal cancer screening, but only as a non-preferred choice for average-risk adults who do not complete preferred tests. Here is what changed, what did not, and what to know about accuracy, follow-up colonoscopy, and Medicare coverage. ([pressroom.cancer.org](https://pressroom.cancer.org/colorectal-cancer-screening-guideline-update-2026))
