Poisoning by therapeutic gases, intentional self-harm, init

This diagnosis code signifies a patient presenting with adverse effects resulting from the deliberate self-administration of therapeutic gases, such as oxygen or nitrous oxide, with the intent to cause harm. The "initial encounter" designation indicates that this is the first time the patient is being seen for this specific poisoning event.

Apply this code when a patient is admitted to the emergency department or hospital after intentionally inhaling therapeutic gases in a suicide attempt or other self-injurious behavior. This would include cases where the patient explicitly states their intent or where clinical evidence strongly suggests self-harm.

• Always assign an additional code for the specific therapeutic gas involved (e.g., T59.0X1A for toxic effect of oxygen).
• Ensure documentation clearly supports intentional self-harm; if accidental, a different intent code is required.
• The "initial encounter" applies as long as the patient is receiving active treatment for the poisoning.