Poisoning by therapeutic gases, intentional self-harm, subs

This code signifies a patient presenting for follow-up care or management of complications arising from a deliberate act of self-poisoning using therapeutic gases. This includes gases like nitrous oxide or oxygen when intentionally misused to cause harm. The patient's initial acute poisoning event has already been addressed.

Apply this code when documenting subsequent encounters for patients who previously attempted suicide or self-harm by inhaling therapeutic gases. This could involve follow-up appointments for respiratory complications, neurological sequelae, or mental health evaluations related to the poisoning event. It is used after the initial acute treatment has concluded.

• Always assign an additional code for the specific therapeutic gas involved, if known.
• Ensure documentation clearly indicates the "subsequent encounter" status, such as follow-up, aftercare, or management of late effects.
• Pair this code with relevant mental health diagnoses (e.g., depression, anxiety) if the patient is receiving ongoing psychiatric care related to the self-harm attempt.