Poisoning by opium, undetermined, sequela

This code signifies the long-term effects or complications arising from an opium poisoning where the intent (accidental, intentional self-harm, assault) could not be determined. It indicates that the acute phase of the poisoning has passed, and the patient is now experiencing residual health problems directly attributable to the past opium exposure.

Apply this code when documenting conditions such as chronic organ damage, neurological deficits, or persistent mental health issues that are a direct consequence of a past opium overdose or exposure, and the circumstances of the poisoning remain unknown. This is appropriate for follow-up encounters addressing these lasting effects, not for the initial acute poisoning event.

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