Poisoning by other psychodysleptics, undetermined, sequela

This code indicates a long-term consequence or complication arising from a poisoning event involving unspecified hallucinogenic substances, where the intent of the poisoning (e.g., accidental, intentional self-harm) could not be determined. It signifies that the acute phase of the poisoning has passed, and the patient is now experiencing residual effects.

Use this code when documenting a patient presenting with a chronic condition, disability, or other lasting health problem that is directly attributed to a past poisoning by a hallucinogen, and the original poisoning event's intent was not specified. This code is appropriate for follow-up encounters addressing these persistent sequelae.

• Always assign this code as a secondary diagnosis, following the code for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a past hallucinogen poisoning.
• Do not use this code for acute poisoning events; those require codes from the initial encounter or subsequent encounter categories.