Toxic effect of carb monx from oth source, self-harm, subs

This code signifies a patient presenting for follow-up care related to carbon monoxide poisoning that was intentionally self-inflicted, but the source of the carbon monoxide was not from motor vehicle exhaust or utility gas. This indicates the patient is receiving ongoing management for the effects of the poisoning after the initial acute phase.

This code is appropriate for subsequent encounters when a patient is being treated for residual symptoms or complications arising from a deliberate self-harm attempt involving carbon monoxide from sources like charcoal burning, faulty appliances, or industrial chemicals. It should be used for visits after the initial emergency treatment.

• Always assign an external cause code (X67.-) in conjunction with this code to specify the intent and circumstances.
• Ensure the "D" seventh character is used only for subsequent encounters, not initial or sequela.
• Verify the carbon monoxide source is not motor vehicle exhaust or utility gas, as those have specific codes.