Toxic effect of substances, accidental, sequela

This code signifies a long-term or residual condition resulting from an accidental exposure to a toxic substance not otherwise specified. The initial toxic event has resolved, but the patient continues to experience lasting health problems directly attributable to that exposure.

Apply this code when documenting chronic organ damage, neurological deficits, or other persistent health issues that are a direct consequence of an unintentional poisoning by a substance not covered by more specific codes. This is used after the acute phase of the toxic effect has passed and the sequela is being treated or monitored.

• Always sequence this code after the code for the specific sequela (e.g., chronic kidney disease, peripheral neuropathy).
• Ensure documentation clearly links the current condition to a past accidental toxic exposure.
• Do not use for acute toxic effects; refer to the appropriate acute poisoning codes.