"States reported a total of 1,248,599 individuals with co-occurring mental health and substance use disorders aged 12 years and older who were served in the 2019 reporting period, accounting for 20 percent of all individuals served during this period.
"Mental health diagnoses for individuals with co-occurring mental health and substance use disorders aged 12 and older who were served in the 2019 reporting period differed somewhat by gender, age group, race, ethnicity, living arrangements, employment, not in labor force details, service setting, and timing of admission. Mental health diagnoses for this cohort were largely similar across SMI/SED [Serious Mental Illness / Serious Emotional Disturbance] status."
Substance Abuse and Mental Health Services Administration, Center for Behavioral Health Statistics and Quality. Mental Health Annual Report: 2014–2019. Use of Mental Health Services: National Client-Level Data. Rockville, MD: Substance Abuse and Mental Health Services Administration, 2021.
