ICD-10 Code F16.159 – Hallucinogen abuse with hallucinogen-induced psychotic disorder, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F16.159 – Hallucinogen abuse with hallucinogen-induced psychotic disorder, unspecified
What it is
This code identifies hallucinogen misuse accompanied by a psychotic disorder caused by the substance, when the psychosis type is not further specified. It indicates both abuse and a documented hallucinogen-induced psychotic state.
Clinical signs
Clinical features vary; refer to documentation. Common findings include hallucinations, delusions, disorganized thinking, or impaired reality testing temporally linked to hallucinogen use.
When to use this code
Use this code when the record clearly states hallucinogen abuse with a hallucinogen-induced psychotic disorder and does not name a more specific psychotic subtype. It is appropriate when the clinician links the psychosis to hallucinogen use and documents the condition as unspecified. Check documentation if the substance use pattern or psychotic diagnosis is unclear.
Do not use for
Do not use this code for hallucinogen use without abuse, or for psychosis unrelated to hallucinogen exposure. If the record identifies a more specific hallucinogen-induced psychotic disorder, code that instead.
Coding tip
Confirm that both abuse and substance-induced psychosis are documented together before assigning F16.159.