SAMHSA, the Substance Abuse and Mental Health Services Administration, is the federal agency responsible for improving prevention, treatment, and recovery services for mental health conditions and substance use disorders across the United States. It sits within the Department of Health and Human Services and works primarily by funding state and local programs, collecting national data on behavioral health, running crisis support lines, and publishing clinical guidelines that shape how care is delivered nationwide.
SAMHSA’s Core Mission
SAMHSA’s official mission is to “lead public health and service delivery efforts that treat mental illness, especially serious mental illness, prevent substance abuse and addiction, and provide treatments and supports to foster recovery while ensuring access and better outcomes for all.” In practice, this means the agency doesn’t typically treat patients directly. Instead, it acts as a funding engine and knowledge hub, channeling billions of dollars to states, tribes, territories, and community organizations that run prevention programs, treatment centers, and recovery support services on the ground.
The agency organizes its work around six strategic priorities: preventing substance misuse, addressing serious mental illness, expanding crisis intervention, improving access to evidence-based treatment, supporting long-term recovery, and identifying emerging behavioral health threats like new synthetic drugs or rising youth mental health crises.
How SAMHSA Funds Treatment and Prevention
The most direct way SAMHSA affects communities is through grants. Its two largest funding streams are block grants that go to every state and territory, giving local governments flexibility to address their specific needs.
The Substance Use Prevention, Treatment, and Recovery Services Block Grant (known as the SUBG) provides funds to all 50 states, the District of Columbia, Puerto Rico, U.S. territories, and one tribal entity. States use this money to run substance use prevention activities, fund treatment programs, and support recovery services for individuals and families. Each state must have a designated unit within its executive branch to administer the grant, apply annually for funds, and can distribute money to local governments, community organizations, and faith-based groups.
A parallel block grant, the Community Mental Health Services Block Grant, funds mental health services in a similar structure. Beyond these two major programs, SAMHSA also awards competitive grants targeting specific issues like opioid overdose prevention, mental health services for children, and crisis care expansion.
National Data Collection
SAMHSA runs the National Survey on Drug Use and Health (NSDUH), the leading source of population-level statistics on alcohol, tobacco, and drug use, mental health conditions, and other behavioral health trends in the U.S. This annual survey shapes national policy by revealing how many Americans struggle with substance use disorders, how many receive treatment, which age groups are most affected, and how patterns shift over time. When you see a headline citing rates of depression, binge drinking, or marijuana use among teens, the underlying data often comes from NSDUH.
Crisis Lines and Treatment Locators
SAMHSA operates or oversees several direct-to-public resources. The most prominent is the 988 Suicide and Crisis Lifeline, which offers 24/7 support by call, text, or chat for anyone experiencing a mental health crisis, suicidal thoughts, or substance use emergencies. Congress designated 988 as the national crisis dialing code in 2020, building on the existing National Suicide Prevention Lifeline. SAMHSA describes 988 as “a first step towards a transformed crisis care system in America,” and the agency funds the network of local and regional crisis centers that answer those calls. The service includes access for deaf and hard-of-hearing individuals and Spanish speakers.
SAMHSA also maintains FindTreatment.gov, a free, confidential online directory where anyone can search for mental health and substance use treatment facilities across the country. The tool lets you find practitioners who prescribe buprenorphine for opioid addiction, locate methadone treatment programs, and learn about different types of care before starting treatment.
Clinical Guidelines and Best Practices
Through its Evidence-Based Practices Resource Center, SAMHSA publishes a wide range of clinical resources aimed at helping communities, clinicians, and policymakers adopt treatments that actually work. These come in several formats. Treatment Improvement Protocols (TIPs) are detailed guides on specific clinical topics, such as TIP 63, which covers medications for opioid use disorder. Advisories address timely topics like peer recovery support in rural areas or standards for crisis care workers. The center also offers screening and assessment tools, categorized by substance type and audience, along with toolkits for community-level initiatives like preventing alcohol and drug misuse among young people.
These publications matter because they translate research into practical recommendations. A small-town clinic deciding how to implement telehealth for patients with serious mental illness, for example, can use SAMHSA’s published guide that distills the evidence into specific steps for implementation.
Federal Workplace Drug Testing
One of SAMHSA’s less well-known roles involves setting the standards for drug testing in federal and federally regulated workplaces. Its Division of Workplace Programs oversees federal drug-free workplace programs, certifies executive branch agencies’ drug-free workplace plans, and identifies safety-sensitive positions subject to random testing. The division also runs the National Laboratory Certification Program, which certifies the laboratories authorized to conduct forensic drug testing for federal agencies and regulated industries like transportation and nuclear energy.
Beyond the federal workforce, the division develops and shares information to help private employers build their own drug-free workplace programs, including a publicly available Drug-Free Workplace Toolkit.
How SAMHSA Is Led
SAMHSA is headed by an official at the assistant secretary level within the Department of Health and Human Services. As of late 2025, Christopher D. Carroll serves as the Principal Deputy Assistant Secretary for Mental Health and Substance Use, providing overall leadership for the agency’s policies, programs, operations, and budget. The position carries responsibility for both intragovernmental coordination and public affairs, reflecting SAMHSA’s role as a bridge between federal policy and the local organizations that deliver care.