Adverse effect of amphetamines, subsequent encounter

This code signifies a harmful or undesirable reaction to amphetamines that occurs during a follow-up visit. This adverse effect is not due to poisoning or overdose, but rather a side effect or complication arising from the therapeutic use of the drug.

Apply this code when a patient presents for ongoing management or evaluation of an adverse effect from amphetamine use, such as cardiac arrhythmias, severe anxiety, or psychosis, after the initial treatment of the adverse effect has already begun. This would be used for subsequent encounters related to monitoring the resolution or ongoing impact of the adverse reaction.

• Requires a seventh character of "D" for subsequent encounter.
• Always sequence this code after the code for the specific manifestation of the adverse effect.
• Distinguish from poisoning (T43.61-) or underdosing (T43.626-) which have different code ranges.