Poisoning by anthelminthics, intentional self-harm, sequela

This code indicates a long-term consequence or residual effect resulting from a deliberate act of self-poisoning with an anthelminthic medication. It signifies that the acute phase of the poisoning has passed, but the patient continues to experience health problems directly attributable to the overdose. These sequelae can range from organ damage to neurological deficits.

Use this code when documenting a patient presenting with chronic or persistent health issues that are a direct result of a past intentional self-harm event involving an anthelminthic. This applies to follow-up encounters where the focus is on managing these lasting effects, rather than the acute poisoning itself. It should be assigned after the initial acute poisoning has been treated and the patient is experiencing ongoing complications.

• Always assign an additional code(s) to specify the nature of the sequela (e.g., specific organ damage, neurological impairment).
• Do not use this code for the initial acute poisoning event; use the acute poisoning code (T37.4X2A) for that encounter.
• Ensure documentation clearly links the current sequela to the past intentional anthelminthic poisoning.