In response to concerns about COVID-19 transmission, many ambulatory care visits have transitioned to telehealth visits. This commentary describes the impact of telehealth on diagnostic errors and medication safety in ambulatory settings. Recommendations to further understand the impact of telemedicine on patient safety include: systematically measuring patient safety outcomes and increasing reporting of safety incidents; identifying the patients and clinical scenarios with the greatest risk of unsafe telehealth care; identifying and supporting best practices to ensure equal access to safe telehealth.