Poisoning by unsp drug/meds/biol subst, self-harm, sequela

This code signifies a long-term complication or residual effect resulting from a deliberate act of self-poisoning involving an unspecified drug, medication, or biological substance. It indicates that the acute phase of the poisoning has passed, and the patient is now experiencing a chronic or lasting consequence directly attributable to that past event.

Apply this code when documenting conditions such as chronic organ damage (e.g., liver failure, kidney damage), neurological deficits, or persistent psychological sequelae that are definitively linked to a prior intentional self-poisoning event with an unidentifiable substance. This code is appropriate for follow-up encounters after the initial acute poisoning has been treated.

• Always sequence this code after the code(s) identifying the specific sequela (e.g., chronic liver disease).
• Ensure documentation clearly links the current condition to a past intentional self-harm poisoning.
• Avoid using this code for acute poisoning events; use the appropriate acute poisoning code with the 7th character "A" (initial encounter).