Underdosing of amphetamines, sequela

This code signifies a patient's current health condition or complication that is a direct result of a past underdosing of amphetamines. It indicates that the patient previously did not receive enough of the prescribed amphetamine, and this past event is now causing ongoing health issues. The sequela could be a recurrence of the original condition the amphetamine was treating, or a new adverse effect stemming from the insufficient dosage.

Use this code when documenting a patient presenting with a long-term effect or consequence directly attributable to a prior instance of not taking enough amphetamine medication. This applies to situations where the underdosing event itself is no longer active, but its lasting impact is being treated. Examples include a patient experiencing a relapse of ADHD symptoms due to chronic underdosing, or developing a related psychological issue as a sequela.

• Always sequence this code after the code for the specific sequela (e.g., the mental health condition or symptom).
• Ensure documentation clearly links the current condition to a past underdosing event of amphetamines.
• This "S" seventh character indicates a sequela, meaning the residual effect of the underdosing, not the acute event itself.