Integrated Dual Disorder Treatment for Inpatient Settings

Integrated Dual Disorder Treatment (IDDT) for Inpatient Settings was developed by the Ohio Substance Abuse and Mental Illness Coordinating Center of Excellence (CCOE)—an initiative of the Center for Evidence-Based at Case Western Reserve University—and the State of Ohio’s inpatient Behavioral Healthcare Organizations (BHOs). This model was created with reference to and as an adaptation of the community-based IDDT model and fidelity scale.

The IDDT model is an evidence-based practice that improves the quality of life for people with co-occurring severe mental illness and substance use disorders by combining substance abuse services with mental health services. It helps people address both disorders at the same time—in the same service organization by the same team of treatment providers.

Learn more about the philosophy and core components of IDDT on this website (click here).


• IDDT Inpatient Fidelity Scale

IDDT Overview (Booklet)

Implementing IDDT: A Step-By-Step Guide to Stages of Organizational Change (Booklet)

More Resources & Tools


Data analysis of Integrated Dual Disorder Treatment reveals cost savings for State of Ohio

IDDT pioneer Bob Drake reflects upon the ongoing evolution of integrated treatment and the importance of supported employment