Poisoning by oth systemic anti-infect/parasit, undet, subs

This code signifies a patient's adverse reaction or illness resulting from exposure to a systemic anti-infective or antiparasitic medication not otherwise specified, where the intent of the exposure (e.g., accidental, intentional self-harm) cannot be determined. This diagnosis is used when the patient is receiving ongoing care for the effects of this poisoning after the initial treatment.

Apply this code for follow-up visits, rehabilitation, or long-term management of complications arising from an undetermined poisoning by a systemic anti-infective or antiparasitic. This includes situations where the patient is being monitored for organ damage, neurological effects, or other sequelae of the initial poisoning event.

• Always assign an additional code for the specific manifestation(s) of the poisoning, such as organ failure or neurological symptoms.
• Ensure the "D" seventh character is appropriate for subsequent encounters; "A" is for initial encounters and "S" for sequelae.
• Confirm that the specific anti-infective or antiparasitic agent is not covered by a more specific code within the T36-T37 range.