The main objective of this methodological report is to provide comparisons between NSDUH and other national data sources for adult and adolescent mental health prevalence estimates, updating a previous report comparing 2009 NSDUH estimates with other data sources (Hedden et al., 2012). Other sources of data are 2001 to 2003 National Comorbidity Survey Replication (NCS-R), 2001 to 2004 National Comorbidity Survey Adolescent Supplement (NCS-A), 2001 to 2002 National Epidemiologic Survey on Alcohol and Related Conditions (NESARC) Wave 1, 2012 to 2013 NESARC-III, • 2011 to 2012 Behavioral Risk Factor Surveillance System (BRFSS), 2012 National Health Interview Survey (NHIS), 2012 Medical Expenditure Panel Survey (MEPS), 2011 to 2012 National Survey of Children\'s Health (NSCH), and 2009 and 2011 Youth Risk Behavior Survey (YRBS).