Poisoning by antithrombotic drugs, self-harm, init

This code signifies a patient presenting with adverse effects from an antithrombotic medication, such as warfarin, heparin, or novel oral anticoagulants, due to a deliberate act of self-poisoning. The patient intentionally ingested or administered an excessive dose of the drug with the intent to cause harm.

Apply this code for initial encounters where a patient is admitted or seen for acute management of an overdose of an antithrombotic agent, and the history clearly indicates intentional self-harm. This includes emergency department visits, inpatient admissions for stabilization, or initial outpatient evaluations following such an event.

• Always assign an additional code for the specific antithrombotic drug involved (e.g., T45.51- for anticoagulants, T45.52- for antithrombotic agents).
• Ensure documentation explicitly states "intentional self-harm" or similar phrasing to support the "2" in the 5th character.
• For subsequent encounters related to the same poisoning event, use the appropriate subsequent or sequela encounter character.