Hallucinogen use, unsp w hallucinogen-induced mood disorder

This code signifies a diagnosis of a mood disorder directly caused by the use of hallucinogenic substances, where the specific hallucinogen is not identified. The patient experiences significant mood disturbances, such as depression, mania, or mixed affective states, that are directly attributable to their hallucinogen use.

Use this code when documentation clearly links a patient's mood disorder to their use of hallucinogens, and the specific type of hallucinogen is not specified. This is appropriate for initial assessments or when a definitive substance cannot be identified despite a clear causal relationship.

• Ensure documentation explicitly states the mood disorder is "hallucinogen-induced" and not merely co-occurring with hallucinogen use.
• Avoid this code if the specific hallucinogen (e.g., LSD, PCP) is documented; instead, use a more specific code from the F16.xx series.
• Always sequence this code after any acute intoxication or withdrawal codes, if applicable, to reflect the primary substance-related issue.