Poisoning by therapeutic gases, assault, sequela

This code signifies a long-term health condition or complication resulting from a past poisoning event involving therapeutic gases. The poisoning was intentionally inflicted by another person. The sequela could manifest as chronic respiratory issues, neurological damage, or other persistent health problems directly attributable to the original assault.

Use this code when documenting a patient presenting with a current health problem that is a direct consequence of a previous assault involving therapeutic gases. This applies to follow-up encounters where the acute phase of the poisoning has resolved, but the patient continues to experience residual effects. Examples include chronic lung disease after forced inhalation of anesthetic gases, or persistent neurological deficits from carbon monoxide poisoning inflicted by another.

• Always sequence this code after the code for the specific sequela (e.g., chronic bronchitis, anoxic brain damage).
• Ensure documentation clearly links the current condition to a past poisoning by therapeutic gases and specifies the assault intent.
• Do not use this code for the initial acute poisoning event; use the acute poisoning code with the appropriate seventh character for initial encounter.