Agency-owned or operated facilities that provide an alternative living environment for adults with developmental disabilities, sensory impairments, physical disabilities, emotional disabilities, multiple disabilities or chronic illnesses such as AIDS who are in need of personal services, supervision and/or assistance essential for self-protection or sustaining the activities of daily living and consequently are unable to live with their own families or in a more independent setting. Group residences for adults with disabilities may be licensed by the state and may be distinguished according to the level of service residents require. Service levels depend on the self-care skills residents possess, their limitations in the areas of physical coordination and mobility, and the presence and extent of behavior problems including disruptive or self-injurious behavior.

Community based residential facilities that provide treatment services in the context of a 24-hour, supervised drug and alcohol-free environment for people who have problems related to excessive use of alcohol and/or use of other drugs

A condition, previously referred to in the U.S. as "dual diagnosis", in which individuals have both a diagnosed mental illness and a substance use disorder involving either drugs or alcohol. Any combination of mental health and substance use disorders qualifies for this diagnosis, e.g., an alcohol use disorder and depression, post-traumatic stress disorder and a heroin use disorder, prescription drug dependence and anxiety. For purposes of treatment, it is recommended that clients receive intensive medical and therapeutic intervention and care for both disorders at the same time, allowing them to manage the symptoms caused by the mental health disorder without resorting to drugs and/or alcohol and worsening their mental health symptoms, or allowing an untreated mental health order to increase the urge to drink or get high.

Disorders related to excessive alcohol use, other drug use or use of other substances including caffeine and tobacco that is characterized by an inability to control or limit the amount taken or the frequency; intense cravings; continuing use despite problems with work, school or family/social obligations or interpersonal problems; risky use, e.g., driving a car, operating machinery while under the influence or continuing to smoke following an emphysema diagnosis; or evidence of pharmacological indicators (tolerance and withdrawal symptoms), the adjustment the body makes as it attempts to adapt to the continued and frequent use of a substance.