Drug & Alcohol Services Information System (DASIS)

The Drug and Alcohol Services Information System (DASIS) is the primary source of national information on the services available for substance abuse treatment and the characteristics of individuals admitted to treatment. The system is in the public domain and was developed and is maintained by the Substance Abuse and Mental Health Services Administration (SAMHSA) within the U.S. Department of Health & Human Services (HHS).

DASIS contains three data sets which are maintained by DASIS staff and contractors within SAMHSA, with cooperation and support from each State:

• The Inventory of Substance Abuse Treatment Services (I-SATS), an electronic master list of all organized substance abuse treatment facilities known to the Substance Abuse and Mental Health Services Administration (SAMHSA),
• The National Survey of Substance Abuse Treatment Services (N-SSATS), an annual survey of the treatment providers on the I-SATS; and
• The Treatment Episode Data Set (TEDS), a national database containing a minimum data set of information about individuals admitted to and discharged from treatment (primarily by providers receiving public funding).