Poisn by unsp sys anti-infect and antiparastc, undet, subs

This code signifies a poisoning event involving an anti-infective or antiparasitic medication where the specific drug is unknown, and the intent (accidental, intentional self-harm, assault) cannot be determined. This diagnosis is used when a patient is receiving follow-up care for the effects of such an exposure.

Apply this code for subsequent encounters when a patient presents for ongoing treatment or monitoring related to a previously diagnosed poisoning by an unspecified systemic anti-infective or antiparasitic. This includes situations where the initial acute effects have been managed, but the patient requires further medical attention for residual symptoms or complications. Use this code when the documentation clearly indicates an undetermined intent for the poisoning.

• Ensure documentation explicitly states "undetermined" intent for the poisoning.
• This "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Do not use this code for initial acute poisoning encounters; refer to the "A" seventh character for those cases.