Poisoning by methamphetamines, undetermined, subs

This code signifies a patient presenting with adverse effects from methamphetamine exposure where the intent (e.g., accidental, intentional self-harm, assault) cannot be determined. The "subsequent encounter" indicates the patient is receiving follow-up care for the poisoning after initial treatment.

Apply this code when a patient is seen for ongoing management of methamphetamine poisoning, and the medical record does not clearly state whether the exposure was accidental, intentional, or due to assault. This would include scenarios like follow-up appointments for organ damage, psychiatric complications, or withdrawal symptoms stemming from the undetermined methamphetamine exposure.

• Always sequence this code after the primary diagnosis for the specific manifestation of the poisoning (e.g., acute psychosis, cardiac arrhythmia).
• Ensure documentation explicitly supports "undetermined" intent; if intent is known, a different T43.65 subcategory should be used.
• The "D" seventh character indicates the patient is in the recovery phase and receiving routine follow-up care for the poisoning.