Which of the following can be accessed through a secured website to request prescription refills from providers?

The DEA reporting site is primarily used for regulatory and compliance purposes related to controlled substances. It does not provide a platform for patients to request prescription refills, focusing instead on the monitoring and reporting of drug prescriptions by healthcare professionals.

Electronic prescribing (e-prescribing) is a technology that allows healthcare providers to send prescriptions directly to pharmacies electronically. While it streamlines the prescription process, it does not serve as a platform for patients to request their own refills, which is specifically handled through patient portals.

Personal health records (PHRs) are tools that allow patients to manage and store their health information. Although they may contain prescription information, they do not typically offer direct functionality for patients to request refills from providers, which is a service provided by patient portals.