Poisoning by tetracyclic antidepress, undetermined, sequela

This code signifies a long-term health problem or complication resulting from an exposure to tetracyclic antidepressants where the intent of the poisoning (e.g., accidental, intentional self-harm, assault) cannot be determined. The patient is no longer in the acute phase of the poisoning but is experiencing residual effects.

Apply this code when documenting chronic conditions, organ damage, or persistent neurological deficits that are directly attributable to a past tetracyclic antidepressant poisoning of unknown intent. This would be used for follow-up encounters after the initial acute treatment has concluded.

• Requires a seventh character 'S' to indicate sequela, meaning the residual effect of a past poisoning.
• Always sequence this code after the codes for the specific sequelae (e.g., chronic kidney disease, persistent arrhythmia).
• Ensure documentation clearly links the current condition to the past tetracyclic antidepressant poisoning and explicitly states the undetermined intent.