TY - JOUR T1 - Clinicians’ Overestimation of Their Geographic Service Area JF - The Annals of Family Medicine JO - Ann Fam Med SP - S63 LP - S66 DO - 10.1370/afm.2383 VL - 17 IS - Suppl 1 AU - Robert M. Rock AU - Winston R. Liaw AU - Alex H. Krist AU - Sebastian Tong AU - David Grolling AU - Jennifer Rankin AU - Andrew W. Bazemore Y1 - 2019/08/12 UR - http://www.annfammed.org/content/17/Suppl_1/S63.abstract N2 - In this study, we evaluated family physicians’ ability to estimate the service area of their patient panel—a critical first step in contextual population-based primary care. We surveyed 14 clinicians and administrators from 6 practices. Participants circled their estimated service area on county maps that were compared with the actual service area containing 70% of the practice’s patients. Accuracy was ascertained from overlap and the amount of estimated census tracts that were not part of the actual service area. Average overlap was 75%, but participants overestimated their service area by an average of 166 square miles. Service area overestimation impedes implementation of targeted community interventions by practices. ER -