Underdosing of parasympatholytics and spasmolytics, sequela

This code indicates a long-term health condition or complication arising from a patient not receiving enough of their prescribed parasympatholytic medication (such as anticholinergics or antimuscarinics) or spasmolytics. This underdosing has led to a persistent or residual effect that is being treated or evaluated. The sequela could be a worsening of the original condition the medication was meant to treat, or a new problem directly attributable to the insufficient dosage over time.

Use this code when documenting a patient presenting with a chronic or residual condition that is a direct consequence of historical underdosing of anticholinergic, antimuscarinic, or spasmolytic drugs. This applies when the underdosing event itself is no longer acute, but its lasting impact is the focus of the current encounter. Examples include persistent urinary incontinence due to chronic underdosing of an antimuscarinic, or ongoing muscle spasms from insufficient spasmolytic therapy in the past.

• This "S" seventh character indicates a sequela, meaning the residual effect of a past underdosing event.
• Always code the specific sequela (e.g., urinary incontinence, muscle spasm) first, followed by this underdosing code to indicate its cause.
• Ensure documentation clearly links the current condition to the previous underdosing of the specified drug class.