Crash data alone do not fully reveal the medical and financial consequences of motor vehicle crashes. Linking crash, vehicle, and behavior characteristics to their specific medical and financial outcomes provides a more comprehensive understanding of motor vehicle crash outcomes. Crash prevention and mitigation factors can also be identified through data linkage. From 1992 to 2013, NHTSA worked with States to develop data linkage programs under the CODES effort. State CODES programs became fully autonomous in 2013.