Poisoning by anthelminthics, accidental, sequela

This code signifies long-term health problems or conditions that arise as a direct result of an accidental overdose or toxic exposure to an anthelminthic medication. These sequelae are the residual effects that persist after the acute phase of the poisoning has resolved. Examples could include chronic organ damage, neurological deficits, or other lasting complications.

Apply this code when documenting a patient presenting with a chronic condition or permanent injury that is definitively linked to a past, unintentional anthelminthic poisoning. This would be used after the acute poisoning event has been treated and the patient is now dealing with the lasting consequences. It is appropriate for follow-up encounters addressing these persistent issues.

• Always assign an additional code(s) to specify the nature of the sequela (e.g., specific organ damage, neurological disorder).
• Do not use this code for the initial acute poisoning event; that would require an acute poisoning code from the T36-T65 range.
• Ensure documentation clearly establishes the causal link between the past accidental anthelminthic poisoning and the current sequela.