Poisoning by anthelminthics, undetermined, sequela

This code indicates a long-term or residual effect stemming from a poisoning event involving anthelminthic medications, where the intent of the poisoning (accidental, intentional self-harm, assault, or undetermined) could not be established. The patient is no longer in the acute phase of the poisoning but is experiencing persistent health issues directly attributable to the past exposure to these anti-parasitic drugs.

Use this code when documenting a patient presenting with chronic conditions or lasting damage (e.g., organ damage, neurological deficits) that are definitively linked to a prior anthelminthic poisoning. This applies when the original poisoning event's intent was never determined or is not relevant to the current encounter, and the patient is being treated for the sequelae.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly links the current condition to the past anthelminthic poisoning.
• Do not use this code for acute poisoning; refer to the appropriate acute poisoning codes for initial encounters.