ICD-10 Code F16.980 – Hallucinogen use, unspecified with hallucinogen-induced anxiety disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F16.980 – Hallucinogen use, unspecified with hallucinogen-induced anxiety disorder
What it is
This code identifies hallucinogen use where the patient has an anxiety disorder caused by the substance. Use it when the record links anxiety symptoms directly to hallucinogen use, but the specific hallucinogen is not named.
Clinical signs
Typical findings include anxiety, fear, panic, or marked nervousness occurring with hallucinogen use or shortly after exposure. Clinical features vary; refer to documentation for the provider’s stated diagnosis and substance relationship.
When to use this code
Use this code when documentation states hallucinogen use, unspecified, with an induced anxiety disorder. It fits encounters where the clinician attributes the anxiety disorder to hallucinogen use and does not identify a specific hallucinogen.
Code it from the diagnosis statement, assessment, or problem list. If the record only mentions anxiety without a causal link to hallucinogen use, check documentation before assigning this code.
Do not use for
Do not use it for anxiety disorders unrelated to hallucinogen use, or when a different substance is identified. Check documentation if the chart supports intoxication, withdrawal, or another substance-induced condition instead.
Coding tip
Confirm both elements are documented: hallucinogen use and the induced anxiety disorder.