Toxic effect of nitrogen oxides, self-harm, sequela

This code signifies the long-term, residual effects resulting from intentional self-poisoning with nitrogen oxides. It indicates that the acute toxic event has passed, but the patient continues to experience health problems directly attributable to that exposure. These sequelae can manifest in various organ systems, depending on the severity and duration of the initial poisoning.

Apply this code when documenting chronic conditions or permanent damage that developed as a direct consequence of a past intentional self-harm attempt involving nitrogen oxides. This would include follow-up encounters for ongoing treatment of respiratory, neurological, or other systemic damage. It is appropriate for use after the acute phase of the poisoning has resolved.

• Always sequence this code after the code(s) identifying the specific sequela(e) (e.g., chronic bronchitis, neurological deficits).
• Ensure documentation clearly links the current condition to the past intentional nitrogen oxide poisoning.
• Do not use this code for acute toxic effects; refer to the appropriate acute poisoning codes for initial encounters.