Poisoning by iminostilbenes, undetermined, subs encntr

This code signifies a poisoning event involving iminostilbene medications, such as carbamazepine, where the intent (accidental, intentional self-harm, assault, or therapeutic error) cannot be determined. This specific code is used when the patient is receiving follow-up care for the poisoning after the initial treatment of the acute effects.

Apply this code for patients presenting for ongoing management, monitoring, or treatment of residual effects from an iminostilbene poisoning where the circumstances of the poisoning are unknown. This includes follow-up appointments for organ damage, neurological sequelae, or psychological support related to the undetermined poisoning.

• Always sequence this code after the primary diagnosis for the specific manifestation of the poisoning.
• Do not use this code for initial encounters; instead, use the appropriate initial encounter code (T42.1X1A, T42.1X2A, T42.1X3A, T42.1X4A).
• Ensure documentation clearly supports the "undetermined" intent and the "subsequent encounter" status.