Health information about prisoners is excluded from national databases. The lack of health information on prisoners reduces the estimate of true prevalence of diseases in the United States. Without sufficient representation of disease prevalence of both civilian and non-civilian populations, funding decisions are based on an underrepresentation of the true need. This underrepresentation disproportionately affects lower socioeconomic minorities and has an impact on measuring health disparities especially in cardiovascular disease. The prison population is at highest risk of adverse health outcome during times of transition from prison to the general population. The access to health data related to cardiovascular diseases in the prison population (inmates and newly released) and the recommendations from a workshop held by the National Heart, Lung, and Blood Institute are discussed.