Poisoning by unsp psychodysleptics, self-harm, init

This code signifies a patient presenting with adverse effects from an intentional overdose or self-poisoning with an unspecified hallucinogenic substance. The "initial encounter" designation indicates the patient is receiving active treatment for the acute effects of the poisoning.

This code is appropriate for emergency department visits or initial hospital admissions where a patient has deliberately ingested an unknown hallucinogen with suicidal intent. It should be used when the specific type of psychodysleptic substance is not documented.

• Always sequence this code first when it represents the primary reason for the encounter.
• Requires additional codes for any associated mental health conditions (e.g., depression, suicidal ideation) or physical injuries.
• Avoid using if the specific hallucinogen is known; instead, use a more precise code from the T40.9 category.