The Division of Mental Health and Addiction Services (DMHAS) serves as the Single State Agency (SSA) for substance use and the State Mental Health Authority (SMHA) as designated by the U.S. Department of Health and Human Services, Substance Abuse and Mental Health Services Administration (SAMHSA). DMHAS oversees the provision of a broad range of adult community mental health and addiction services throughout the State, and contracts with various entities to provide and support community-based prevention, early intervention, treatment, education, and recovery services, including for at-risk and special populations. DMHAS contracts with a wide range of community mental health and substance use provider agencies that assist clients living in the community.

DMHAS is the lead organization planning for the 988 crisis and suicide prevention continuum of services, including the 988 contact centers, mobile crisis outreach, and future crisis receiving and stabilization centers.

DMHAS coordinates and manages addiction treatment services delivery for criminal justice programs through collaboration with other state entities, including the Administrative Office of the Courts, Department of Corrections, and State Parole Board. It is responsible for the Statewide Intoxicated Driving Program, which schedules individuals convicted of driving under the influence for detention, screening, evaluations, education, and treatment referral and oversees the Intoxicated Driver Resource Centers (IDRCs).

DMHAS contracts with community agencies to provide screening services in order to reduce inappropriate inpatient or outpatient commitments and avoid unnecessary incarcerations. DMHAS designates funds and, with the NJ Department of Health, regulates the provision of mental health services at inpatient units in acute care hospitals known as short-term care facilities, as well as the assessment, referral, commitment, and crisis intervention functions of screening centers.

The Disaster and Terrorism Branch (DTB) is responsible for the planning and implementation of post-disaster services for local, county, and statewide events. The Branch collaborates with federal and state emergency management partners to plan for and deploy services for affected individuals and groups.