Substance Abuse and Mental Health Services Administration (SAMHSA) logoDASIS Drug and Alcohol Services Informaton System
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NOTICE: This website ( is being transferred. Its data files will be housed on the Substance Abuse & Mental Health Data Archive (SAMHDA) at, and the reports will be housed on the SAMHSA Data Page at

Although we do not anticipate any issues during or after this transfer, we ask that you notify us if you have any difficulties accessing the documents or data currently on any of the BHSIS, (formerly, DASIS), SAMHDA, or SAMHSA Data Page websites. To leave comments or questions, please click on the “Comments/Questions” button in the navigation bar to the left.


DASIS Program Description

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. DASIS contains three data sets which are maintained with the cooperation and support of the States:

  1. The Inventory of Behavioral Health Services (I-BHS), an electronic master list of all organized substance abuse treatment facilities known to the Substance Abuse and Mental Health Services Administration (SAMHSA),
  2. The National Survey of Substance Abuse Treatment Services (N-SSATS), an annual survey of the treatment providers on the I-BHS; and
  3. 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).