Poisoning by therapeutic gases, self-harm, sequela

This code indicates a long-term consequence or complication arising from a deliberate act of self-poisoning using therapeutic gases. This refers to conditions that persist after the acute phase of the poisoning has resolved, such as chronic respiratory issues, neurological damage, or other lasting organ dysfunction.

Apply this code when documenting a patient presenting with a sequela directly attributable to a past intentional self-harm event involving therapeutic gases. This would be used in follow-up encounters for chronic conditions resulting from such an incident, not for the initial acute poisoning.

• Always sequence this sequela code after the code for the specific nature of the sequela (e.g., chronic bronchitis, anoxic brain damage).
• Ensure documentation clearly links the current condition to the past intentional self-harm by therapeutic gases.
• Do not use this code for acute poisoning events; use the appropriate acute poisoning code with the 7th character "A" for initial encounter.