Poisn by anticoag antag, vit K and oth coag, slf-hrm, subs

This code signifies a deliberate act of self-poisoning involving substances that counteract anticoagulants, such as vitamin K or other procoagulant agents. This could occur in an attempt to reverse the effects of blood thinners or to induce clotting. The "subsequent encounter" indicates that the patient is receiving follow-up care for complications or ongoing management related to this initial self-harm incident.

This code is appropriate for documenting follow-up visits, hospital readmissions, or ongoing treatment for a patient who previously intentionally poisoned themselves with anticoagulant antagonists or other coagulants. Examples include a patient returning for monitoring of coagulation parameters after initial stabilization, or for treatment of organ damage resulting from the overdose. It would not be used for the initial acute care encounter.

• Ensure documentation clearly states "intentional self-harm" and that the encounter is not the initial treatment.
• Always sequence this code after any codes for the specific adverse effects or complications of the poisoning.
• Verify the substance involved is an anticoagulant antagonist, vitamin K, or other coagulant, and not an anticoagulant itself.