The Joint Longitudinal Viewer (JLV) is a clinical application that provides an integrated, read-only display of health data from the Department of Defense (DOD), Department of Veterans Affairs (VA), and provider organizations outside the federal health care systems in a common data viewer. Thousands of DOD and VA clinicians use JLV daily to access real-time medical data in the treatment of their patients. VA benefits administrators also use the application extensively as they research patient medical histories to process claims. The customizable display allows an individual to view patient data through any of JLV’s health information widgets. Users can easily tailor the display to best support their workflow(s). Data in JLV displays chronologically, and it can be easily identified by the site of care.