In Module 1, readers will learn about:

• The appropriate terminology surrounding CODs and COD treatment approaches.
• The numerous factors that led to the creation of this TIP update.
• The need for this TIP, which addresses CODs and summarizes prevalence and treatment rates, trends in programming, and negative events associated with CODs (e.g., increased hospitalization).
• The complicated and bidirectional relationship between mental disorders and SUDs that can make diagnosing and treating these conditions diffcult.
• Essential services for people with CODs must be recovery oriented, culturally responsive, and inclusive of clients’ families or support system (including mutual-help and peer recovery supports).
• Counselors should ensure that they are providing clients full access to treatments.
• Counselors should ensure that they are providing clients full access to treatments;
• All SUD treatment clients should be screened at least annually for SUDs, mental disorders, risk of harm to self and others, functional impairment, and trauma.
• Numerous screening and assessment measures are validated for use with people who have mental disorders and SUDs to help counselors make diagnostic determinations and guide decisions about referral for further