Toxic effect of chlorine gas, intentional self-harm, subs

This code signifies a patient presenting for follow-up care related to a toxic exposure to chlorine gas, where the exposure was deliberately self-inflicted. The patient has already received initial treatment for the acute effects of the poisoning.

This code is appropriate for encounters such as medication adjustments, wound care, respiratory therapy, or psychological counseling for a patient who previously attempted self-harm by inhaling chlorine gas. It indicates that the patient is in the recovery phase and receiving ongoing management for the sequelae of the intentional poisoning.

• Ensure documentation clearly states "intentional self-harm" and that this is not the initial encounter for the poisoning.
• Always sequence this code after any codes for specific conditions or injuries resulting from the chlorine gas exposure (e.g., chemical pneumonitis).
• Consider adding an external cause code (X-code) to further specify the intent and circumstances of the self-harm.