Hallucinogen use, unsp with intoxication, uncomplicated

This code signifies a diagnosis of hallucinogen use disorder where the specific type of hallucinogen is not documented, and the patient is experiencing acute intoxication without any further complications such as delirium, psychosis, or perceptual disturbances. It indicates the immediate effects of hallucinogen ingestion are present but are not severe enough to warrant a more specific intoxication code.

Use this code when documentation confirms hallucinogen intoxication, but the specific hallucinogen is not identified (e.g., "patient intoxicated on unknown hallucinogen"). This code is appropriate when the intoxication is uncomplicated, meaning there are no co-occurring mental or behavioral disturbances beyond the expected acute effects of the substance. Documentation should clearly state "hallucinogen use" and "intoxication, uncomplicated."

• Do not use if the specific hallucinogen is known; instead, use a more precise code from the F16.xx series.
• Avoid this code if there are documented complications of intoxication, such as delirium (F16.921) or psychotic disorder (F16.922).
• Always sequence this code as a primary diagnosis if it is the reason for the encounter, or as a secondary diagnosis if it is a co-occurring condition.