Screening for colorectal cancer (CRC) remains severely underutilized. Although simple reminders are modestly effective in enhancing preventive care utilization, they are not widely utilized. Even if used widely, the effectiveness of simple reminders is limited, leaving nearly half of patients without screening. One explanation for this is that simple reminders do not address the barriers and resources of the patients and physicians they are designed to prompt. In this study, we will examine the impact on CRC screening of a reminder system that uses the physician as the message source and is tailored to the physician screening preferences and patient-reported characteristics, CRC screening-related barriers, status and CRC susceptibility. This intervention will be compared to a standard CRC health education and screening reminder system.