Psychiatrists assess addiction severity in patients through a combination of clinical interviews, standardized assessment tools, and behavioral observations. They conduct detailed interviews to gather information about the patient's substance use history, including frequency, quantity, and duration of use, as well as the impact on daily functioning and relationships. Standardized tools, such as the Addiction Severity Index (ASI) or the Substance Abuse Subtle Screening Inventory (SASSI), may be used to quantify the severity of the addiction and identify areas of concern. Psychiatrists also evaluate co-occurring mental health disorders, which can complicate addiction, and observe physical and psychological symptoms associated with substance use. This comprehensive assessment helps to determine the appropriate level of care and tailor treatment plans to meet individual needs effectively.

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