Randomization
Randomization will occur at the prescriber level and separate, independent randomizations will be performed for new prescription alerts and existing prescription notifications at the time of EHR flagging prescribers' first instance of each. Prescribers may be randomized for alerts, notifications, both, or neither. Once randomized (i.e., after the first alert or notification), alert/notification types for that prescriber will remain consistent throughout the remainder of the study period.To account for variation in both overall and inappropriate DOAC prescribing occurrence, randomization will be stratified by trainee (vs. non-trainee) status and specialist (e.g., cardiology, hematology) vs. primary care for non-trainees. A permuted block randomization implemented via computer scripts that can interface directly with the EHR will be used to generate stratified random assignments.This trial is not fully blinded. Prescribers will be aware of the specific content of their assigned alerts and/or notifications but will be unaware of other intervention options. All study staff monitoring outcomes data collection will be blinded to treatment assignment.