Toxic effect of mercury and its compounds, assault, subs

This code signifies a toxic reaction to mercury or its compounds resulting from an intentional act of harm by another person. The encounter documented is not the initial treatment for the poisoning but rather a follow-up visit for ongoing care, monitoring, or treatment of residual effects.

Apply this code when a patient presents for subsequent care related to mercury poisoning that was inflicted intentionally by another individual. This includes follow-up appointments for chelation therapy, neurological evaluations, or management of long-term complications after the initial acute phase.

• Ensure documentation clearly states the poisoning was due to an assault and that this is not the first encounter for this specific event.
• Always sequence this code after the primary diagnosis indicating the specific manifestation of the mercury toxicity, if applicable.
• Consider additional external cause codes (e.g., Y07.-) to provide further detail about the perpetrator and circumstances of the assault.