Underdosing of unspecified systemic antibiotic, sequela

This code indicates a patient experienced an adverse effect or complication due to not receiving enough of an unspecified systemic antibiotic. It signifies that the underdosing is a past event whose residual effects or complications are now being treated. This is distinct from an active underdosing situation.

Use this code when a patient presents with a condition, infection, or complication that is a direct result of a previously insufficient dose of a systemic antibiotic. Examples include treatment failure, recurrence of infection, or development of resistance attributed to the prior underdosing. It should be assigned as a secondary diagnosis, following the code for the specific condition or sequela being treated.

• Always assign a primary code for the specific condition or sequela resulting from the underdosing.
• Ensure documentation clearly links the current condition to a past underdosing event.
• Do not use for active underdosing; this code is specifically for sequelae.