Poisoning by tricyclic antidepressants, undetermined, subs

This code signifies a patient presenting for follow-up care or sequelae related to an overdose or adverse reaction to tricyclic antidepressants, where the intent of the poisoning (e.g., accidental, intentional self-harm, assault) cannot be determined from the medical record. The patient is no longer in the acute phase of the poisoning but is still receiving treatment or monitoring for its effects.

Use this code for subsequent encounters when a patient is being managed for ongoing complications, side effects, or recovery from tricyclic antidepressant poisoning of undetermined intent. This includes situations like follow-up appointments after discharge from an acute care setting, or ongoing outpatient management of organ damage or psychiatric sequelae.

• Ensure the medical record clearly documents "undetermined" intent for the poisoning.
• The "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Always code any specific manifestations or sequelae of the poisoning (e.g., cardiac arrhythmias, neurological deficits) in addition to this code.