Which of the following is NOT a residential mental health facility service?

A skilled nursing facility is primarily designed to provide medical care and assistance with daily living activities for individuals with chronic illnesses or disabilities. These facilities focus on nursing care rather than specialized mental health support and rehabilitation.

In contrast, a sub-acute unit provides transitional care for individuals with mental health conditions, offering a structured environment where patients can receive intensive treatment and support. Home Share programs typically involve matching individuals in need of support with caregivers in a shared living arrangement, fostering a community-based approach to mental health care. Substance abuse clinics specifically address addiction and often offer residential treatment programs focused on substance use recovery, which is a key aspect of certain mental health services.

Thus, the skilled nursing facility stands apart from the other options, making it the service that does not align with the specific scope of residential mental health facility services.