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HomeResearch-Based Programs

A Comprehensive Program
for the Integrated Treatment of Co-occurring Disorders

Research has shown that the most effective treatment for co-occurring disorders is an integrated approach that treats substance use and mental health disorders at the same time.

Co-occurring Disorders ProgramThe Hazelden Co-occurring Disorders Program is the first comprehensive program that provides the best integrated treatment services for people with non-severe psychiatric disorders that co-occur with substance use disorders.

This integrated treatment approach helps people recover by offering both mental health and substance use services at the same time and in one setting.


Based on Integrated Dual Disorders Treatment Model

The Dartmouth Psychiatric Research Center developed and tested the Integrated Dual Disorders Treatment (IDDT) model, an established evidence-based practice designed for people with severe mental health disorders.

The Hazelden Co-occurring Disorders Program draws on the numerous randomized controlled trials using the IDDT model and adapts them for patients with non-severe mental health disorders.


The Hazelden Co-occurring Disorders Program was developed by leaders in the research and treatment of co-occurring disorders.

The program authors are faculty members of the Dartmouth Medical School.


The primary goal of the Hazelden Co-occurring Disorders Program is to offer current information and proven tools to treat non-severe co-occurring disorders.

The Hazelden Co-occurring Disorders Program:

  • Helps program directors assess and expand the capabilities of their current organization
  • Offers clinicians an easy-to-use treatment program with tools that give clients and their families necessary services and support
  • Integrates the most current best practices and therapies in the field, such as motivational enhancement therapy (MET), cognitive-behavioral therapy (CBT), and Twelve Step facilitation (TSF)

The program also offers:

  • Effective customizable strategies to treat clients' specific co-occurring disorders
  • Evidence-based strategies and standardized best practices for treatment, mental health, and criminal justice
  • Tools to help sustain clinicians' confidence and skills to assess and treat patients' co-occurring disorders
  • Benchmarks to transform Addiction Only Services (AOS) or Mental Health Only Services (MHOS) to Dual Diagnosis Capable (DDC), and to transform a DDC program to Dual Diagnosis Enhanced (DDE) treatment
  • Manualized integrated treatment interventions that educate and train new staff to treat both substance use and mental health disorders
  • A DVD presentation that allows clients and family members to access the same educational information offered to clinicians and other health care professionals. This approach supports a key concept of effective treatment in which all participants are equal shareholders in deciding the most appropriate integrated treatment plan
  • Screening and assessment measures to distinguish between drug-induced mental health problems and psychiatric morbidity and to help determine effective pharmacotherapy and psychosocial interventions

Key excerpts


Seven key components

The Hazelden Co-occurring Disorders Program consists of five curricula, a DVD, and the Clinical Administrator's Guidebook.

Find out more about each component, including prices and how to purchase:

Order Online

Preview CDP

Sampler and overview
Download the first chapters and sample pages from each manual

Slideshow overview
Download a presentation describing the research, background and materials that make up the program

CDP video preview

Clasped hands

A Guide to Living with Co-occurring Disorders provides an educational overview of co-occurring disorders, offers interviews from people who have them, and discusses ways that patients can participate in treatment to better manage their recovery.

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