Hallucinogen use, unsp w psychotic disorder, unsp

This code signifies a diagnosis of hallucinogen use where the specific type of hallucinogen is not documented, and the patient is experiencing a psychotic disorder directly induced by this hallucinogen use. The nature of the psychotic disorder itself is also unspecified. It indicates a direct causal link between the hallucinogen use and the onset of psychotic symptoms.

Use this code when documentation clearly states hallucinogen use and a co-occurring hallucinogen-induced psychotic disorder, but the specific hallucinogen and the precise type of psychotic disorder are not identified. This code is appropriate when a clinician has established a diagnosis of hallucinogen-induced psychosis, but further specificity is lacking in the medical record.

• Assign this code only when the documentation explicitly links the psychosis to hallucinogen use.
• Avoid using this code if the type of hallucinogen or the specific psychotic disorder is known; instead, use a more specific code from the F16.xx category.
• Consider sequencing this code as a primary diagnosis if the hallucinogen-induced psychotic disorder is the main reason for the encounter.