Toxic effect of unsp substance, self-harm, sequela

This code signifies a long-term consequence or complication arising from a previous toxic exposure to an unidentified substance, where the original exposure was deliberately self-inflicted. It indicates that the patient is currently experiencing a health problem directly attributable to that past act of intentional self-poisoning, even if the specific substance is unknown.

This code is appropriate when a patient presents with a chronic or residual condition (e.g., organ damage, neurological deficits, psychological sequelae) that is documented as a direct result of a past, intentional self-harm event involving a toxic substance. It should be used when the specific substance ingested or exposed to cannot be identified in the medical record.

• Requires documentation of a causal link between the current condition and a past intentional self-harm toxic exposure.
• Only use when the specific toxic substance is truly unknown or unidentifiable in the medical record.
• Always assign additional codes for the specific sequela (e.g., chronic kidney disease, neuropathy) to fully describe the patient's condition.