ICD-10 Code F16.180 – Hallucinogen abuse with hallucinogen-induced anxiety disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F16.180 – Hallucinogen abuse with hallucinogen-induced anxiety disorder
What it is
This code identifies hallucinogen abuse accompanied by an anxiety disorder caused by the hallucinogen. Use it when documentation links the substance use to anxiety symptoms rather than a primary anxiety condition.
Clinical signs
You may see excessive worry, panic, restlessness, or fear occurring during or after hallucinogen use. Clinical features vary; refer to documentation for the specific substance, timing, and whether symptoms are substance-induced.
When to use this code
Use this code when the record states hallucinogen abuse and clearly documents hallucinogen-induced anxiety disorder. It fits cases where anxiety is attributed to the drug effect, not an independent anxiety diagnosis. Check documentation if the relationship is unclear.
Do not use for
Do not use it for hallucinogen use without abuse, or for anxiety that is unrelated to hallucinogen use. Do not assign it when the chart does not specify a substance-induced anxiety disorder.
Coding tip
Confirm both elements are documented: hallucinogen abuse and anxiety caused by the hallucinogen.