Underdosing of centr-acting/adren-neurn-block agnt, sequela

This code signifies a patient's long-term health problem or condition that arose as a direct consequence of not receiving enough of a centrally-acting or adrenergic-neuron-blocking medication. This could include chronic symptoms or complications that persist after the initial underdosing event has passed.

Apply this code when documenting a chronic adverse effect or sequela resulting from a past underdosing of medications like clonidine, methyldopa, or guanfacine. This is appropriate for conditions such as uncontrolled hypertension or persistent neurological symptoms directly attributable to the historical insufficient dosage.

• Requires a seventh character "S" to indicate sequela, meaning the residual effect of a previous underdosing.
• Always code the specific sequela (e.g., uncontrolled hypertension) first, followed by this underdosing code.
• Ensure documentation clearly links the current condition to a past underdosing event of the specified drug class.