Poisoning by unsp psychodysleptics, undetermined, sequela

This code signifies a long-term consequence or complication arising from a poisoning event involving an unspecified hallucinogenic substance. The original intent of the poisoning (e.g., accidental, intentional self-harm, assault) could not be determined at the time of the initial event. This code is used when the patient is presenting for care related to these lasting effects, not the acute poisoning itself.

Apply this code when a patient presents with a sequela (e.g., chronic organ damage, persistent neurological deficits, long-term mental health issues) directly attributable to a past poisoning by an unknown hallucinogen. This is appropriate for follow-up encounters after the acute phase of the poisoning has resolved. It should be used when the original poisoning's intent was documented as undetermined.

• Always assign a sequela code for the specific long-term condition if known, in addition to this code.
• Ensure documentation clearly links the current condition to a past poisoning by an unspecified hallucinogen with undetermined intent.
• Do not use this code for acute poisoning events; use the appropriate acute poisoning code with the 7th character "A" for initial encounter.