Assertive Community Treatment (ACT) is a structured way of helping those with major mental illnesses and/or substance abuse by bringing services directly to the patient in home. Instead of hospitalization or an outpatient program, staff members like social workers, psychiatrists, and counselors come directly to the patient’s house for treatment. ACT is used primarily for those with severe and persistent mental illness like schizophrenia or bipolar disorder, some of whom also contend with substance abuse. ACT can be short- or long-term (months to years), and provides the same multidisciplinary, 24/7 staffing of a psychiatric unit, but in the comfort of the patient's own home and/or community.