Corrosion of third degree of left upper arm, sequela

This code signifies a third-degree burn injury to the left upper arm that has resulted in a long-term complication or residual effect. A third-degree burn involves full-thickness destruction of the skin, often extending into subcutaneous tissue, and the "corrosion" aspect indicates a chemical burn etiology. The sequela indicates that the acute phase of the injury has passed, and the patient is now experiencing a lasting consequence.

This code is used when documenting a patient presenting with a chronic condition or complication directly attributable to a past third-degree chemical burn of the left upper arm. Examples include significant scarring, contractures, chronic pain, or functional impairment that developed as a result of the original injury. It should be assigned for encounters where the focus of care is the management of these long-term effects.

• Always assign an external cause code (V00-Y99) to describe the circumstances of the chemical burn, if known and applicable.
• Do not use this code for initial or subsequent encounters when the burn is still in its acute healing phase; use the appropriate acute burn code with the correct encounter type.
• Ensure documentation clearly links the current condition to the past third-degree chemical burn of the left upper arm.