Poisoning by antithrombotic drugs, accidental, sequela

This code signifies a long-term or residual effect resulting from an accidental overdose or unintended exposure to an antithrombotic medication. These sequelae can manifest as chronic bleeding disorders, organ damage, or other persistent health issues directly attributable to the initial poisoning event. The original acute poisoning has resolved, but its lasting impact continues to affect the patient.

Apply this code when documenting a patient presenting with a current condition or symptom that is a direct consequence of a past, accidental antithrombotic drug poisoning. This is appropriate for follow-up visits or when the patient is admitted for treatment of these chronic effects, long after the acute poisoning episode has passed. It indicates that the poisoning event is no longer active but has left a permanent mark on the patient's health.

• Always sequence this code after the code(s) for the specific sequela being treated (e.g., chronic anemia due to past anticoagulant overdose).
• Ensure documentation clearly links the current condition to a past accidental antithrombotic poisoning.
• Do not use for acute poisoning events; those require codes from the initial encounter (A) or subsequent encounter (D) categories.