Why did it take so long for colon cancer screening to be a covered benefit when insurance has long paid for treating this malignancy? The short answer is that screening tests rarely, if ever, save money.
A screening test looks for a disease when the patient has no symptoms. And because of the lack of symptoms, nearly all of these tests offer no medical benefit.
For a screening test to save money, the costs must be very low, the benefit long lasting and the potential for side effects unlikely.