SAMHSA’s new National Guidance on Essential Specialty Substance Use Disorder (SUD) Care articulates a core or essential set of services for adults with SUD that should be available at any specialty SUD treatment facility in the United States. The intended audiences are states and payers, accreditation entities, adults and families in need of care, specialty SUD treatment facility operators/administrators, behavioral health professionals, researchers, and local governments. Currently, there is a dramatic lack of consistency in services available to adults in need of specialty SUD treatment. The goal of this guidance is for the intended audiences to use this tool to identify treatment gaps, support evidence-based planning, and improve outcomes for adults with SUD.