ICD-10 Code F16.18 – Hallucinogen abuse with other hallucinogen-induced disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F16.18 – Hallucinogen abuse with other hallucinogen-induced disorder
What it is
This code identifies hallucinogen abuse with a documented hallucinogen-induced disorder that is not otherwise specified elsewhere in the code set. Use it when the record shows harmful use and a related mental or behavioral effect.
Clinical signs
Clinical features vary; refer to documentation. You may see altered perception, mood changes, anxiety, confusion, or other substance-induced mental symptoms linked to hallucinogen use.
When to use this code
Use this code when the provider documents hallucinogen abuse plus another hallucinogen-induced disorder, and the record does not support a more specific code. It fits encounters where the substance use is clinically significant and the induced condition is part of the assessment. Check documentation if the type of induced disorder is unclear.
Do not use for
Do not use this code for hallucinogen use without abuse, or when the chart supports a different specific hallucinogen-induced disorder code. Avoid it if the documentation only states intoxication, dependence, or poisoning.
Coding tip
Confirm both abuse and the induced disorder are documented before assigning F16.18.