Underdosing of aminoglycosides, sequela

This code signifies a long-term consequence or complication arising from the patient receiving an insufficient dose of an aminoglycoside antibiotic. This underdosing could have led to persistent infection, treatment failure, or other adverse health effects that are now manifesting. The "S" indicates that this is a sequela, meaning the acute phase of the underdosing event has passed, and the current condition is a residual effect.

Use this code when documenting a patient's current condition that is a direct result of a past, inadequate administration of an aminoglycoside. This would apply, for example, if a patient presents with a chronic or recurrent infection due to the original aminoglycoside treatment being ineffective because of underdosing. It is appropriate when the underdosing event itself is no longer active, but its lasting impact is being addressed.

• Always sequence this code after the code(s) for the specific condition or disease that is the sequela of the underdosing.
• Ensure documentation clearly links the current condition to the previous aminoglycoside underdosing.
• Do not use this code for acute underdosing events; use the appropriate acute underdosing code (T36.5X6A or T36.5X6D) for those scenarios.