The Fairfax-Falls Church Community Services Board is the public agency that plans, organizes and provides services for people in the community who have mental illness, substance use disorders, and/or developmental disability. Most other, non-emergency CSB services are primarily for people whose conditions seriously impact their daily functioning. For example, women and girls who are pregnant, intravenous drug users, and people asking for treatment for abuse of opioid drugs (including prescription drugs) have priority for substance use disorder services.