ICD-10 Code F16.988 – Hallucinogen use, unspecified with other hallucinogen-induced disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F16.988 – Hallucinogen use, unspecified with other hallucinogen-induced disorder
What it is
This code identifies hallucinogen use that is linked to another hallucinogen-induced disorder, but the specific disorder is not named. Use it when the record shows hallucinogen-related harm and the documentation does not specify a more exact diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Hallucinogen-induced disorders may include perceptual disturbances, altered thinking, anxiety, agitation, or other substance-related mental changes noted by the clinician.
When to use this code
Use F16.988 when the provider documents hallucinogen use with a hallucinogen-induced disorder, but the exact disorder is not specified. It also fits cases where the chart confirms a hallucinogen-related condition and you cannot assign a more specific code. Check documentation for the exact substance if available.
Do not use for
Do not use this code for uncomplicated hallucinogen use without an induced disorder. Do not use it when the record specifies a different hallucinogen-induced diagnosis or another substance-related disorder.
Coding tip
Always look for the provider’s exact wording; if the induced disorder is named, code that more specific diagnosis instead.