With new capabilities such as multiple practice functionality, role-based access, and a flexible reporting period, the v4.0 release expands the use case to quality measure reporting for multiple healthcare providers, allowing popHealth to be used by organizations such as state healthcare organizations. The v4.0 release is also certified as a 2014 Edition EHR module for clinical quality measure (CQM) reporting (CHPL Certification ID: IG-3687-16-001 and IG-3687-16-0002).
This has nothing to do with VistA. They adopted the PopHealth Project, it’s general CQM certified for MU-2 for use standalone or interfaced to other EMR.