Poisoning by other opioids, assault, sequela

This code signifies a long-term or residual effect stemming from a past poisoning by an opioid other than heroin, methadone, or other synthetic narcotics, where the poisoning was intentionally inflicted by another person. These sequelae can manifest as chronic organ damage, neurological deficits, or persistent mental health conditions resulting from the initial assaultive overdose.

This code is appropriate when documenting a current condition that is a direct consequence of a previous opioid poisoning that was an assault. It is used after the acute phase of the poisoning has resolved, and the patient is being treated for the lasting complications. Examples include chronic liver failure due to a past intentional overdose of oxycodone, or persistent cognitive impairment following an assaultive poisoning with fentanyl.

• Always sequence this sequela code after the code for the specific residual condition being treated.
• Ensure documentation clearly links the current condition to a past opioid poisoning that was an assault.
• Do not use this code for acute poisoning events; it is exclusively for long-term effects.