Toxic effect of tobacco cigarettes, self-harm, subs

This code signifies a patient presenting for follow-up care related to a toxic reaction from deliberately ingesting or otherwise misusing tobacco cigarettes with the intent to harm themselves. The patient is no longer in the acute phase of treatment but is receiving ongoing management for the effects of the poisoning.

Apply this code for patients returning for subsequent appointments after initial treatment for tobacco cigarette poisoning due to intentional self-harm. This includes visits for monitoring organ damage, managing persistent symptoms, or addressing psychological sequelae. Do not use for the initial encounter or for sequelae.

• Requires a seventh character "D" for subsequent encounter.
• Always sequence after the primary diagnosis for the reason for the visit, if applicable.
• Ensure documentation clearly indicates intentional self-harm and a follow-up encounter.