In year n, the 50 selected general practitioners will receive from the national health insurance a list of patients who are not up to date with colorectal cancer screening. Each patient's screening status will be verified by the clinical research associate through a review of the medical records. A telephone call will be made by a member of the patient's primary care team.

In year n, the 50 selected general practitioners will receive from the national health insurance a list of patients who are not up to date with colorectal cancer screening. Each patient's screening status will be verified by the clinical research associate through a review of the medical records. There will not be an intervention.

A telephone call will be made by a member of the patient's primary care team (general practitioner, medical secretary, public health nurse, or care coordinator), with priority given to a call by the patient's general practitioner. The call should preferably be made to the patient's mobile phone. If the call is unsuccessful, a voicemail message will be left, and a second call will be attempted within the following seven days. The voicemail message will include the name of the patient's general practitioner, the purpose of the call regarding colorectal cancer screening, and notification that a further attempt will be made to reach the patient. If the telephone exchange is successful, an appointment at the healthcare facility will be offered to the patient, during which the screening test will be offered to the patient, during which the screening test will be handed over and explained by one of the healthcare professionals from the same facility.

Patients who completed the colorectal cancer screening test during the intervention year (year n), within the patient population of general practitioners participating in the study, and who were identified from the national health insurance list as not up to date with screening - a status that was confirmed by reviewing their medical records.

Completion of the screening will be confirmed by the presence of the test result in the patient's medical record within the General practionner's practice software, no later than three months after the end of the intervention.

This mesure will be done in each arm.

Patients whose colorectal cancer screening status changed between the list received from National Health in year n and the list received in year n+1.

A change in status will be confirmed by the absence of the patient from the n+1 list, among those still registered within the general practitioner's patient panel.