Poisoning by anticoagulant antagonists and other coagulants

This code signifies an adverse reaction or overdose resulting from substances that counteract anticoagulants or promote coagulation. This includes agents like vitamin K, protamine sulfate, or other procoagulant factors administered therapeutically, as well as accidental or intentional ingestions. The poisoning leads to clinical manifestations such as abnormal clotting, thrombotic events, or other systemic toxicities.

Apply this code when documentation clearly indicates poisoning by a coagulant or an anticoagulant antagonist. This typically occurs in scenarios of medication error, accidental overdose, or intentional self-harm involving these specific drug classes. Supporting documentation should specify the substance involved and the resulting adverse effects.

• Distinguish between poisoning (adverse effect due to overdose/wrong substance) and adverse effect in therapeutic use (e.g., side effect at correct dosage).
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter.
• Look for specific drug names like vitamin K, protamine, or factor concentrates in the medical record to confirm the substance.