Patient access to electronic health information is mandated by the 21st Century Cures Act.1,2 Therefore, institutions have developed policies promoting information access through online portals. However, policies that do not adequately protect confidentiality can result in unintended disclosures of sensitive health information. When the possibility of parental disclosure exists, many adolescents hesitate to share complete health information with clinicians,3,4 potentially resulting in incomplete histories and adverse outcomes (eg, undiagnosed sexually transmitted infections or untreated mental health disorders). We assessed whether concerns surrounding parental access to portal information altered sensitive health information sharing among late adolescents and young adults and the likelihood of opening a portal account.