The US Digital Service has launched version 2 of the BlueButton API. The BlueButton API covers the Medicare claims domain within the FHIR healthcare data portability standard and now that BlueButton 2.0 is out, many organizations that orbit the Medicare ecosystem will be rolling out their support for it in an effort to improve patient and caregiver access to what is commonly referred to as the longitudinal patient record: a record that covers the broad history of a particular patient's healthcare and that is interoperable across all systems that are relevant to the patient's care. In this interview, ProgrammableWeb editor-in-chief David Berlind interviews USDS product manager Kelly Service about the significance of the launch.