Poisoning by antiviral drugs, undetermined, init encntr

This code signifies an adverse event resulting from an antiviral medication where the intent (e.g., accidental, intentional self-harm, assault) cannot be determined. The patient is presenting for the initial treatment of the poisoning.

Apply this code when a patient presents with symptoms of poisoning due to an antiviral drug, and the medical record does not specify whether the poisoning was accidental, intentional, or due to an assault. This code is appropriate for the first encounter for this specific poisoning event.

• Always assign an additional code for the specific antiviral drug involved, if known.
• Do not use this code for adverse effects of properly administered antiviral drugs; refer to the T36-T50 drug tables for those scenarios.
• Ensure the "A" seventh character is used only for the initial encounter for treatment of the poisoning.