Toxic effect of carb monx from utility gas, assault, subs

This code signifies the adverse health effects resulting from exposure to carbon monoxide specifically originating from utility gas, where the exposure was intentionally inflicted by another person. It indicates that the patient is receiving follow-up care for the sequelae of this toxic exposure after the initial treatment phase.

Apply this code for patients presenting for ongoing management, rehabilitation, or evaluation of persistent symptoms following a carbon monoxide poisoning event from utility gas that was determined to be an assault. This includes follow-up appointments for neurological deficits, cardiac complications, or other organ damage sustained during the initial poisoning.

• Ensure documentation clearly specifies "utility gas" as the source of carbon monoxide and that the intent was an "assault."
• The "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Always sequence this code as a secondary diagnosis when a primary condition (e.g., anoxic brain injury) is being treated as a direct result of the poisoning.