Treatment for drug abuse and addiction is delivered in many different settings, using a variety of behavioral and pharmacological approaches. In the United States, more than 11,000 specialized drug and alcohol treatment facilities provide intervention, drug and alcohol detox, rehabilitation, counseling, behavioral therapy, medication, case management, and other types of services to persons with drug use disorders. Because drug abuse and addiction are major public health problems, a large portion of drug treatment is funded by local, State, and Federal governments. Private and employer-subsidized health plans also may provide coverage for treatment of drug addiction and its medical consequences. Drug abuse and addiction are treated in specialized treatment facilities and mental health clinics by a variety of providers, including certified drug abuse counselors, physicians, psychologists, nurses, and social workers. Treatment is delivered in outpatient, inpatient, and residential settings. Although specific treatment approaches often are associated with particular treatment settings, a variety of therapeutic interventions or services can be included in any given setting.