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

This code signifies a patient presenting for follow-up care or treatment of adverse effects resulting from an intentional overdose or self-poisoning with an unknown or unspecified drug, medication, or biological substance. The initial act of self-harm has already occurred, and the patient is now receiving ongoing management for its consequences.

Apply this code when documenting subsequent encounters for patients who previously attempted suicide or intentionally harmed themselves via an unspecified substance overdose. This includes follow-up appointments for organ damage, psychiatric evaluation, or ongoing detoxification after the initial acute phase. It is appropriate when the specific substance involved in the poisoning is not identified in the medical record.

• Ensure the documentation clearly indicates "intentional self-harm" and that this is a "subsequent encounter" for the poisoning.
• Only use this code when the specific drug, medicament, or biological substance is not documented or is unknown. If the substance is known, a more specific T50.- code should be used.
• Always code any associated physical or mental health conditions resulting from the poisoning in addition to this code.