The VistA 4 Product Roadmap outlines how the Department of Veterans Affairs (VA), under the direction of the VistA Evolution Program, will build upon the previous success and institutional knowledge investment in Veterans Health Information Systems and Technology Architecture (VistA) Electronic Health Record (EHR). The evolution of VA�s existing EHR product will be known as VistA 4. The updated VA EHR system will be interoperable with the EHR systems of the Department of Defense (DoD) and other healthcare partners to enhance patient-centered, team- and evidence-based care by giving healthcare providers a complete picture of a patient�s care and treatment history.