Background: The National Center for Health Statistics (NCHS) provides statistical information to guide actions and policy to improve the health of the American people. NCHS has developed a data linkage program that links its cross-sectional health survey data to information from vital and administrative data sources. Through a collaborative interagency agreement between NCHS and the U.S. Department of Housing and Urban Development (HUD), participants in two national health surveys administered by NCHS were linked to administrative data from HUD.Methods: This report describes and evaluates the data linkage of 1999\u20132012 National Health Interview Survey (NHIS) and National Health and Nutrition Examination Survey (NHANES) to administrative...