Association of Primary Care Clinic Appointment Time With Clinician Ordering and Patient Completion of Breast and Colorectal Cancer Screening

Key Points Question Are breast and colorectal cancer screening rates associated with the time of day a patient visits the primary care clinician? Findings In this quality improvement study analysis of 33 primary care practices including 19 254 patients eligible for breast cancer screening and 33 468 patients eligible for colorectal cancer screening, both clinician ordering and patient completion of cancer screening tests decreased as the time of day progressed. Meaning Patients with primary care clinic appointment times later in the day were less likely to be ordered for and receive guideline recommended cancer screening.