The National Survey of Substance Abuse Treatment Services (N-SSATS), conducted by the Substance Abuse and Mental Health Services Administration (SAMHSA), is an annual survey of facilities providing substance abuse treatment. The survey is designed to collect data on the location, characteristics, and use of alcoholism and drug abuse treatment facilities and services throughout the 50 States, the District of Columbia, and other U.S. jurisdictions. This report presents the findings from the 2002 N-SSATS. It is divided into five chapters: Chapter 1 presents a description of the N-SSATS, chapter 2 describes trends in facility characteristics, chapter 3 describes facility characteristics and services, chapter 4 presents client characteristics, and chapter 5 presents State data. Findings from the survey include: 13,720 facilities responded to the survey in 2002 for a response rate of 96 percent. These facilities reported a 1-day census of 1,136,287 clients receiving substance abuse treatment on March 29, 2002. There were 91,851 clients under the age of 18 in treatment on March 29, 2002, making up 8 percent of the total population in treatment on that date. Of the facilities that responded to the survey in 2002, 61 percent were private non-profit, 25 percent were private for-profit, and 11 percent were State or local government facilities. Over half (51 percent) of all facilities had managed care contracts in 2002, as compared to 42 percent in 1996. Outpatient treatment was the most widely available type of care, with regular outpatient care offered by 74 percent of all facilities and intensive outpatient care offered by 44 percent of all facilities. Day treatment/partial hospitalization services were offered by 15 percent of all facilities, outpatient detoxification by 12 percent, and outpatient methadone/LAAM maintenance by 7 percent. Residential rehabilitation was offered by 26 percent of all facilities and hospital inpatient rehabilitation by 4 percent; residential detoxification and hospital inpatient detoxification were offered by 8 percent and 7 percent of all facilities, respectively. Nearly half of all facilities (49 percent) offered special programs for the dually diagnosed, clients with mental and substance abuse disorders, and more than one-third of all facilities (37 percent) had programs for adolescents. Nearly half of all clients (48 percent) were in treatment for both alcohol and drug abuse; 31 percent were in treatment for drug abuse only, and 21 percent were in treatment for alcohol abuse only. Tables, figures, and 3 appendices