Underdosing of unsp systemic anti-infect/parasit, sequela

This code indicates a patient experienced a long-term or residual effect resulting from the insufficient administration of an unspecified systemic medication used to treat infections or parasites. This underdosing event, which occurred in the past, has led to a current health problem or complication. The specific anti-infective or antiparasitic agent involved is not documented.

Apply this code when documentation clearly links a current sequela (e.g., chronic infection, organ damage) to a previously inadequate dosage or duration of an anti-infective or antiparasitic medication, and the specific drug class is not identified. This code is appropriate for conditions that are a direct consequence of the underdosing, even if the original underdosing event is no longer active.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation explicitly states a causal link between the underdosing and the current condition.
• If the specific class of anti-infective or antiparasitic is known, use a more specific T37.x6XS code.