The purpose of this trial is to determine whether setting up a follow-up appointment for patients who received treatment and were discharged from the emergency department increases their compliance with the follow-up appointment. We are enrolling patients who need a follow-up visit, have health insurance but report do not have a primary care doctor. Patients are randomized to one of three treatment groups: (1) assistance setting up a follow-up appointment by a research assistant using ZocDoc; (2) ZocDoc information given to the subject to set up follow-up appointment by him/herself; or (3) usual discharge instructions by ED staff. Subjects are phoned approximately 2 weeks after the ED visit and asked whether they completed a follow-up visit, satisfaction with their ED visit, satisfaction with their follow-up visit, and additional ED treatment and recovery.