Late effect of poisoning due to drug, medicinal or biological substance

This code signifies a health problem that persists or arises long after an acute poisoning event caused by a drug, medicinal, or biological substance. It describes the residual effects or sequelae of such poisoning, not the acute poisoning itself.

Use this code when a patient presents with a current condition directly attributable to a past poisoning from a drug, medication, or biological agent. Documentation should clearly link the current manifestation to a previous, resolved poisoning episode.

• Always sequence this code after the code identifying the specific late effect (e.g., neurological deficit, organ damage).
• Do not use this code for acute poisoning; use appropriate E-codes and acute poisoning codes.
• Ensure documentation explicitly states the "late effect" or "sequela" of a past poisoning event.