Toxic effect of nitrogen oxides, intentional self-harm, subs

This code signifies a toxic reaction resulting from the deliberate self-administration or exposure to nitrogen oxides. This particular code is used when the patient is receiving follow-up care for the initial poisoning event, such as monitoring for long-term effects or managing complications. The intent of self-harm is a critical component of this diagnosis.

Use this code for subsequent encounters where a patient is being treated for the lingering effects or complications of a prior intentional self-poisoning by nitrogen oxides. This includes follow-up appointments for respiratory issues, neurological damage, or other systemic effects that arose from the initial toxic exposure. It would not be used for the initial acute poisoning event.

• Ensure documentation clearly specifies "intentional self-harm" as the intent of the poisoning.
• Verify that the encounter is for follow-up care, not the initial acute treatment.
• Always code an external cause code (e.g., X67.-) in conjunction with this diagnosis to provide more detail about the circumstances of the self-harm.