In Reply We appreciate the comments regarding our recent Original Investigation1 by Sharp and Rediger et al who highlight important considerations and provide suggestions for future studies. Sharp raises concerns that our study1 adds to the existing atheoretical literature on why patients miss appointments. We concur that a large body of literature and conceptual frameworks have explored factors—both patient-related and health system–related—that likely contribute to missed appointments.2 In fact, our team members are actively exploring strategies that broadly address the social determinants of health in an effort to improve heath care access.3,4 That said, Sharp appears to miss the major reason for our study1: to assess the marginal impact of addressing transportation barriers through ridesharing.