The data being made available through Blue Button 2.0 initiative provides opportunities to leverage this data for meaningful purposes. Depending on the motivation of the user of these systems, the purpose and approach may differ.
Bluebutton2.0

BlueButton 2.0 Use Cases in Healthcare Ecosystem
Blue Button 2.0 is creating a data-centric ecosystem for Medicare beneficiaries. By facilitating access to patient health history, it has the potential to drive down Medicare spending and improve health outcomes.