Poisoning by opium, accidental (unintentional), sequela

This code signifies the long-term effects or complications arising from an accidental overdose or exposure to opium. It indicates that the acute poisoning event has resolved, but the patient is now experiencing residual health problems directly attributable to that past incident.

Apply this code when documenting conditions such as chronic organ damage, neurological deficits, or persistent psychological issues that are a direct consequence of a previously treated unintentional opium poisoning. This code is appropriate for follow-up encounters addressing these lasting sequelae, not the initial acute poisoning.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., chronic liver failure, anoxic brain damage).
• Ensure documentation clearly links the current condition to a past accidental opium poisoning.
• Do not use this code for acute poisoning events; those require codes with the appropriate 7th character for initial or subsequent encounter.