Blister (nonthermal) of middle front wall of thorax, init

This code signifies a non-burn related blister located on the sternum or the central anterior chest wall. It indicates a superficial skin lesion characterized by a fluid-filled sac, resulting from friction, pressure, or other non-thermal causes.

Apply this code when documenting a patient's initial presentation for a blister on the middle front wall of the thorax, such as one caused by ill-fitting clothing, prolonged pressure, or an allergic reaction. This code is appropriate for the first time a patient is seen for this specific injury.

• Ensure the blister is explicitly documented as non-thermal in nature.
• Verify the precise anatomical location is the middle front wall of the thorax (e.g., sternal area).
• Confirm this is the initial encounter for the injury; subsequent encounters will require a different seventh character.