Underdosing of systemic anti-infect/parasit, sequela

This code signifies a long-term consequence or complication arising from the patient not receiving enough of a prescribed systemic anti-infective or antiparasitic medication. This underdosing could be due to various reasons, leading to persistent or recurring infections, treatment failure, or other chronic health issues directly attributable to the insufficient medication.

Use this code when documenting a condition that is a direct result of a past underdosing event of a systemic anti-infective or antiparasitic. This applies when the acute underdosing event itself is no longer active, but its lasting effects are being treated or monitored. Examples include chronic infections that failed to clear due to insufficient antibiotic courses, or parasitic infestations that recurred because the initial treatment was inadequate.

• Always sequence this code after the code(s) for the specific sequela being treated.
• Consider using an additional code from categories Z91.12- or Z91.13- to specify the patient's noncompliance or intentional underdosing, if applicable and documented.
• Ensure documentation clearly links the current condition to a past underdosing event, indicating it is a long-term effect rather than an acute underdosing episode.