Past year prevalence of mild or moderate mental illness or illicit drug or alcohol abuse by insurance type. * Average past year mental illness and illicit drug or alcohol abuse for public insurance and uninsured. † Average past year mental illness and illicit drug or alcohol abuse for private insurance and Medicare. (Source: 2010 National Survey on Drug Use and Health). # Psychologists, licensed clinical social workers, and other licensed mental health professionals were grouped together for analyses as “licensed mental health providers”.