ICD-10 Code F15.121 – Other stimulant abuse with intoxication delirium (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F15.121 – Other stimulant abuse with intoxication delirium
What it is
F15.121 identifies stimulant abuse involving intoxication delirium from a stimulant other than cocaine. It means the patient has delirium caused by recent stimulant use, with the abuse pattern documented.
Clinical signs
Delirium typically presents with acute confusion, reduced attention, disorganized thinking, and fluctuating awareness. Clinical features vary; refer to documentation for the specific stimulant, timing, and whether intoxication is confirmed.
When to use this code
Use this code when the record documents stimulant abuse and the patient’s delirium is attributed to intoxication from that stimulant. It is appropriate when the provider links the mental status change to current stimulant use. Check documentation if the chart does not clearly state abuse, intoxication, and delirium together.
Do not use for
Do not use this code for stimulant dependence, stimulant use without delirium, or delirium from another cause. Do not apply it when the substance is cocaine or when documentation is insufficient.
Coding tip
Confirm the provider explicitly connects the delirium to stimulant intoxication before assigning F15.121.