Toxic effect of carb monx from mtr veh exhaust, asslt, sqla

This code describes the long-term or residual effects resulting from a carbon monoxide poisoning event caused by motor vehicle exhaust, specifically when the poisoning was due to an assault. It indicates that the acute phase of the poisoning has passed, and the patient is now experiencing ongoing health issues directly attributable to that past exposure.

Use this code when documenting a patient presenting with chronic neurological, cardiovascular, or other systemic sequelae following an assault-related carbon monoxide poisoning from motor vehicle exhaust. This applies to follow-up visits where the focus is on managing these persistent effects, not the initial acute poisoning.

• Ensure the medical record clearly documents the assault as the intent and motor vehicle exhaust as the source of carbon monoxide.
• This code is for sequelae, meaning it should not be used for the initial acute poisoning or subsequent encounters for acute treatment.
• Always code the specific sequela (e.g., anoxic brain damage, cardiac arrhythmia) first, followed by this external cause code.