Study, Treat, Observe, and Prevent Neglected Diseases of Poverty Act or the STOP Neglected Diseases of Poverty Act This bill directs the Department of Health and Human Services (HHS) to address neglected diseases of poverty in the United States. Among other activities, HHS must establish an interagency task force to provide recommendations to address neglected diseases of poverty in the United States; provide grants to states to implement surveillance systems to determine the prevalence, incidence, and distribution of such diseases; and increase awareness of neglected diseases of poverty among health care providers and the public.