Poisoning by other narcotics, undetermined, sequela

This code signifies a long-term health problem or complication arising from a past poisoning event involving a narcotic substance not otherwise specified. The original intent of the poisoning (e.g., accidental, intentional self-harm, assault) could not be determined at the time of the initial event. This code is used to report the residual effects after the acute phase of the poisoning has resolved.

Apply this code when documenting a chronic condition or permanent injury directly attributable to a prior, unspecified narcotic poisoning. Examples include ongoing organ damage, neurological deficits, or mental health disorders that developed as a sequela. This code is appropriate for follow-up encounters addressing these lasting effects.

• Always assign this code as a secondary diagnosis, following the code for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a past narcotic poisoning of undetermined intent.
• Do not use this code for acute poisoning events; instead, refer to the appropriate acute poisoning codes.