“…The VHA has moved beyond the first generation of its electronic health record and its extensive national administrative datasets and is now developing second and third generation informatics products for VHA clinicians, patients, managers, and scientists. Administrative data are available for rapid identification of unintended consequences of health care policy [16] and adverse events [19], threats to patient safety [20], and access to care barriers [11,15]. Clinical datasets with the administrative data support large-scale epidemiological research and observational studies of interventions.…”