Poisoning by therapeutic gases, undetermined, init encntr

This code signifies a patient presenting with adverse effects from therapeutic gases, where the intent of the poisoning (accidental, intentional self-harm, assault) cannot be determined. The "initial encounter" indicates that this is the first time the patient is receiving active treatment for this specific poisoning.

Use this code when a patient experiences poisoning symptoms due to gases administered for therapeutic purposes (e.g., anesthetic gases, medical oxygen, nitric oxide), and the circumstances surrounding the exposure are unclear or undocumented. This applies to situations where the provider cannot definitively state if the poisoning was accidental or intentional.

• Always sequence this code first when it represents the primary reason for the encounter.
• Do not use this code if the intent of the poisoning is known (e.g., accidental, intentional self-harm, assault); instead, select the appropriate intent-specific code.
• Ensure documentation clearly supports the "undetermined" intent and the "initial encounter" for treatment.