We argue that voluntary mental health registries integrated into the 9-1-1 system, where patients and caregivers can establish a repository of this information, will help fill this information gap by enabling first responders to quickly understand the context of a call for service with a mental health component, and to make better informed decisions. Despite valid concerns about privacy, stigma, and the potential misuse of protected health information, such registries, if carefully designed and administered, can improve the health outcomes of (...) 9-1-1 calls for service involving mental health-related crises. (shrink)