Prior research has shown that when patients have access to clinicians' notes, they may identify relevant safety concerns. In this study, 9550 obstetrics and gynecology patients were provided with access to their outpatient visit documentation. Almost 70% of eligible patients read one or more notes during the study period, but only 3.2% shared feedback through 232 electronic reports. Of patients who provided feedback, 27% identified errors in the documentation; provider reviewers determined that 75% of these could impact care.