Adverse effect of unspecified psychodysleptics, init encntr

This code signifies an initial adverse reaction to a hallucinogenic substance where the specific drug is not identified. It indicates that the patient is experiencing an undesirable effect from a psychodysleptic drug, rather than an intentional overdose or poisoning. The "initial encounter" aspect means the patient is receiving active treatment for this specific adverse effect.

Use this code when a patient presents to a healthcare facility with symptoms directly attributable to an adverse reaction to an unspecified hallucinogen. This is appropriate for initial evaluations and treatments of these reactions, such as acute psychosis, severe anxiety, or other physiological responses to the drug. It should be applied when the specific hallucinogen causing the reaction is unknown or not documented.

• Always sequence this code first when it is the primary reason for the encounter.
• Do not use this code for intentional overdose, poisoning, or drug abuse without an adverse effect.
• If the specific hallucinogen is known, use a more specific code from the T40.9 category.