Adverse effect of methamphetamines, subsequent encounter

This code signifies a harmful or unintended reaction to methamphetamine use that occurs during a follow-up visit or after the initial treatment for the adverse effect. It indicates that the patient is experiencing ongoing complications or new symptoms related to a previous methamphetamine exposure.

Apply this code when a patient presents for continued management of an adverse effect from methamphetamines, such as persistent cardiac arrhythmias, neurological deficits, or psychiatric symptoms, after the initial encounter for the adverse event. This is appropriate for follow-up appointments, rehabilitation visits, or when monitoring the long-term impact of the drug.

• Always sequence this code after the primary diagnosis describing the specific adverse effect (e.g., tachycardia, psychosis).
• Ensure documentation clearly states the adverse effect is due to methamphetamines and that this is a subsequent encounter.
• Distinguish from poisoning (T43.6X1-) or underdosing (T43.6X6-) which have different code categories.