Poisoning by therapeutic gases, assault, subs encntr

This code signifies a patient presenting for follow-up care related to an intentional poisoning by a therapeutic gas, such as medical oxygen or nitrous oxide, administered with malicious intent. The patient is no longer in the acute phase of the poisoning but is receiving ongoing treatment or monitoring for its effects.

Apply this code when documenting subsequent encounters for patients who have been intentionally poisoned by therapeutic gases. This includes follow-up appointments for ongoing symptom management, monitoring for long-term complications, or rehabilitation services after the initial acute treatment.

• Ensure documentation clearly indicates the poisoning was an assault and that this is a subsequent encounter.
• Always code the specific therapeutic gas involved if known and documented.
• Do not use for accidental poisonings or adverse effects of properly administered therapeutic gases.