Family history of other substance abuse and dependence

This code indicates a documented family history of substance abuse or dependence involving substances other than alcohol or tobacco. This includes a history of addiction to illicit drugs, prescription medications used non-medically, or other psychoactive substances within the patient's biological family.

Apply this code when a patient's medical record explicitly states a family history of substance abuse or dependence (excluding alcohol and tobacco) that may be relevant to their current health status, risk assessment, or treatment plan. This is particularly useful for patients presenting with mental health disorders, chronic pain, or other conditions where genetic predisposition or environmental factors related to family substance use are considered.

• Ensure the documentation specifies "other substance abuse" to differentiate from alcohol (Z81.1) or tobacco (Z81.2).
• This code is for family history only; do not use for the patient's personal history or current substance use.
• Always sequence as a secondary diagnosis, as it describes a risk factor rather than a current condition.