Patient and family engagement is essential to effective and safe diagnosis. OurDX is a previsit online engagement tool to help identify opportunities to improve diagnostic safety in patients and families living with chronic conditions. In this study, researchers implemented OurDX in specialty and primary care clinics at two academic healthcare organizations and examined the potential safety issues and whether patient/family contributions were integrated into the post-visit notes. Qualitative analysis of 450 OurDX reports found that participants contributed important information about the diagnostic process. Participants with diagnostic concerns were more likely to raise concerns about the diagnostic process (e.g., access barriers, problems with tests/referrals, communication breakdowns), which may represent diagnostic blind spots.