ICD-10 Code F12.121 – Cannabis abuse with intoxication delirium (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F12.121 – Cannabis abuse with intoxication delirium
What it is
F12.121 identifies cannabis abuse with delirium caused by intoxication. Use it when cannabis use leads to an acute confused state that is more than simple intoxication.
Clinical signs
Clinical features may include disturbed attention, disorientation, reduced awareness of the environment, and fluctuating thinking. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents cannabis abuse and specifies intoxication delirium. It fits cases where delirium is attributed to recent cannabis use and is not better explained by another cause.
Choose the code only when the record clearly links the delirium to cannabis intoxication. Check documentation if the chart says intoxication, altered mental status, or confusion without delirium.
Do not use for
Do not use for uncomplicated cannabis intoxication, cannabis dependence, or cannabis use without abuse. Also avoid it when delirium is due to another substance or medical condition. Check documentation.
Coding tip
Confirm both the substance pattern and the delirium term in the provider note before assigning F12.121.