This resource is commonly referred to as "The IDDT Toolkit." It is published by the Substance Abuse and Mental Health Services Administration (SAMHSA).

$0, Free PDF | This Toolkit is designed to accompany the Dual Diagnosis Capability in Addiction Treatment (DDCAT) Index. It helps service systems and organizations assess their capability (or capacity) to provide treatment for people diagnosed with a substance-use disorder who also have a co-occurring mental illness . 

$0, Free PDF | This Toolkit is designed to accompany the Dual Diagnosis Capability in Mental-Health Treatment (DDCMHT) Index. It helps service systems and organizations assess their capability (or capacity) to provide treatment for people diagnosed with a mental illness who also have a co-occurring substance-use disorder.