Extravasation of other vesicant agent, subsequent encounter

This code signifies an injury to tissue caused by the accidental leakage of a vesicant agent, other than chemotherapy drugs, from a vein into surrounding tissue during or after an infusion. It specifically denotes that the patient is in the healing phase of this extravasation event, not the initial acute phase. The vesicant agent is one capable of causing blistering, tissue necrosis, or severe irritation.

Use this code when documenting the follow-up care for a patient who experienced extravasation of a non-chemotherapeutic vesicant agent, such as certain antibiotics, electrolytes, or contrast media. This applies when the patient is seen for continued monitoring, wound care, or management of complications related to the extravasation after the initial treatment.

• Ensure the documentation clearly specifies the extravasated agent was a vesicant and not a non-vesicant irritant.
• Verify the encounter is for follow-up care, not the initial presentation, which would require an 'A' (initial encounter) seventh character.
• Always code the specific vesicant agent involved, if known, as an additional diagnosis.