Patients and families are encouraged to play an active role in patient safety by, for example, reporting inaccurate or incomplete electronic health record notes after visits. In this study, patients and families at two US healthcare sites (pediatric subspecialty and adult primary care) were invited to complete a survey (OurDX) before their visit to identify their visit priority, recent medical history/symptoms, and potential diagnostic concerns. In total, 7.5% of patients and families reported a potential diagnostic concern, mainly not feeling heard by their provider.